Merge tag 'acpi-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI updates from Rafael Wysocki:
 "These include an ACPICA update (upstream revision 20250807 with a few
  fixes on top), fixes and cleanups of the ACPI processor driver, fixes
  and cleanups of the ACPI properties management code, one more ACPI IRQ
  resource management quirk, one more ACPI backlight quirk, an ACPI
  device enumeration quirk related to _DEP, a power resource quirk
  related to WWAN modem for HP EliteBook 855 G7, ACPI SPCR table parser
  extensions, an ACPI APEI EINJ driver update allowing it to handle more
  address types, and several assorted cleanups of ACPI drivers and PNP
  code.

  Specifics:

   - Add SoundWire File Table (SWFT) signature to ACPICA (Maciej
     Strozek)

   - Rearrange local variable definition involving #ifdef in ACPICA to
     avoid using uninitialized variables (Zhe Qiao)

   - Allow ACPICA to skip Global Lock initialization (Huacai Chen)

   - Apply ACPI_NONSTRING in more places in ACPICA and fix two
     regressions related to incorrect ACPI_NONSTRING usage (Ahmed Salem)

   - Fix printing CDAT table header when dissasebling CDAT AML (Ahmed
     Salem)

   - Use acpi_ds_clear_operands() in acpi_ds_call_control_method() in
     ACPICA (Hans de Goede)

   - Update dsmethod.c in ACPICA to address unused variable warning
     (Saket Dumbre)

   - Print error messages in ACPICA for too few or too many control
     method arguments (Saket Dumbre)

   - Update ACPICA version to 20250807 (Saket Dumbre)

   - Fix largest possible resource descriptor index in ACPICA (Dmitry
     Antipov)

   - Add Back-Invalidate restriction to CXL Window for CEDT in ACPICA
     (Davidlohr Bueso)

   - Add the package type to acceptable Arg3 types for _DSM in ACPICA
     because ACPI_TYPE_ANY does not cover it (Saket Dumbre)

   - Fix return values in ap_is_valid_checksum() in the acpidump utility
     in ACPICA (Kaushlendra Kumar)

   - Add Intel CVS ACPI HIDs to acpi_ignore_dep_ids[] so it is not
     regarded as real dependency (Hans de Goede)

   - Use ACPI_FREE() for freeing an ACPI object in description_show() in
     the ACPI sysfs-related code (Kaushlendra Kumar)

   - Fix memory leak in the ACPI processor idle driver registration
     error code path and optimize ACPI idle driver registration (Huisong
     Li, Rafael Wysocki)

   - Add module import namespace to the ACPI processor idle driver
     (Rafael Wysocki)

   - Eliminate static variable flat_state_cnt from the ACPI processor
     idle driver (Rafael Wysocki)

   - Release cpufreq policy references using __free() in the ACPI
     processor thremal driver (Zihuan Zhang)

   - Remove unused empty stubs of some functions and rearrange function
     declarations in a header file in the ACPI processor driver (Huisong
     Li)

   - Redefine two functions as void in the ACPI processor driver (Rafael
     Wysocki)

   - Stop exposing global variable acpi_idle_driver in the ACPI
     processor driver (Huisong Li)

   - Fix ACPI buffer properties extraction for data-only subnodes
     represented as _DSD-equivalent packages (Rafael Wysocki)

   - Fix handling of ACPI data-only subnodes represented as
     _DSD-equivalent packages in the case when they are embedded in
     larger _DSD-equivalent packages and clean up
     acpi_nondev_subnode_extract() (Rafael Wysocki)

   - Skip ACPI IRQ override on ASUS Vivobook Pro N6506CU (Sam van
     Kampen)

   - Add power resource init function and use it for introducing an HP
     EliteBook 855 G7 WWAN modem power resource quirk (Maciej Szmigiero)

   - Add support for DBG2 RISC-V SBI port subtype and Precise Baud Rate
     field to the ACPI SPCR table parser (Chen Pei)

   - Eliminate a dummy local variable from the ACPI thermal driver
     (Rafael Wysocki)

   - Fold two simple functions into their only caller in the ACPI fan
     driver (Rafael Wysocki)

   - Force native backlight on Lenovo 82K8 in the ACPI backlight (video)
     driver (Mario Limonciello)

   - Add missing sysfs_remove_group() for ACPI_TAD_RT (Daniel Tang)

   - Skip PRM handlers with NULL handler_address or NULL VA in the ACPI
     PRM driver (Shang song)

   - Remove redundant assignments in erst_dbg_{ioctl|write}() in the
     ACPI APEI driver (Thorsten Blum)

   - Allow the ACPI APEI EINJ to handle more types of addresses than
     just MMIO (Jiaqi Yan)

   - Use str_low_high() helper in two places in the ACPI code (Chelsy
     Ratnawat)

   - Use str_plural() to simplify the PNP code (Xichao Zhao)

   - Fix signedness issues in read/write helpers in the ACPI AML
     debugger interface (Amir Mohammad)"

* tag 'acpi-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (50 commits)
  ACPI: debug: fix signedness issues in read/write helpers
  ACPI: processor: Do not expose global variable acpi_idle_driver
  ACPI: SPCR: Support Precise Baud Rate field
  ACPI: processor: idle: Redefine two functions as void
  ACPI: processor: Update cpuidle driver check in __acpi_processor_start()
  ACPI: processor: idle: Rearrange declarations in header file
  ACPI: processor: Remove unused empty stubs of some functions
  ACPI: property: Adjust failure handling in acpi_nondev_subnode_extract()
  ACPI: property: Do not pass NULL handles to acpi_attach_data()
  ACPI: property: Add code comments explaining what is going on
  ACPI: property: Disregard references in data-only subnode lists
  ACPI: property: Fix buffer properties extraction for subnodes
  ACPI: SPCR: Add support for DBG2 RISC-V SBI port subtype
  ACPI: APEI: EINJ: Allow more types of addresses except MMIO
  ACPI: APEI: Remove redundant assignments in erst_dbg_{ioctl|write}()
  ACPICA: acpidump: fix return values in ap_is_valid_checksum()
  ACPICA: ACPI_TYPE_ANY does not include the package type
  ACPICA: CEDT: Add Back-Invalidate restriction to CXL Window
  ACPICA: Fix largest possible resource descriptor index
  ACPICA: Update version to 20250807
  ...

38 files changed, 498 insertions, 252 deletions

diff --git a/drivers/acpi/acpi_dbg.c b/drivers/acpi/acpi_dbg.c
index d50261d05f3a..515b20d0b698 100644
--- a/drivers/acpi/acpi_dbg.c
+++ b/drivers/acpi/acpi_dbg.c
@@ -569,11 +569,11 @@ static int acpi_aml_release(struct inode *inode, struct file *file)
 	return 0;
 }
 
-static int acpi_aml_read_user(char __user *buf, int len)
+static ssize_t acpi_aml_read_user(char __user *buf, size_t len)
 {
-	int ret;
 	struct circ_buf *crc = &acpi_aml_io.out_crc;
-	int n;
+	ssize_t ret;
+	size_t n;
 	char *p;
 
 	ret = acpi_aml_lock_read(crc, ACPI_AML_OUT_USER);
@@ -582,7 +582,7 @@ static int acpi_aml_read_user(char __user *buf, int len)
 	/* sync head before removing logs */
 	smp_rmb();
 	p = &crc->buf[crc->tail];
-	n = min(len, circ_count_to_end(crc));
+	n = min_t(size_t, len, circ_count_to_end(crc));
 	if (copy_to_user(buf, p, n)) {
 		ret = -EFAULT;
 		goto out;
@@ -599,8 +599,8 @@ out:
 static ssize_t acpi_aml_read(struct file *file, char __user *buf,
 			     size_t count, loff_t *ppos)
 {
-	int ret = 0;
-	int size = 0;
+	ssize_t ret = 0;
+	ssize_t size = 0;
 
 	if (!count)
 		return 0;
@@ -639,11 +639,11 @@ again:
 	return size > 0 ? size : ret;
 }
 
-static int acpi_aml_write_user(const char __user *buf, int len)
+static ssize_t acpi_aml_write_user(const char __user *buf, size_t len)
 {
-	int ret;
 	struct circ_buf *crc = &acpi_aml_io.in_crc;
-	int n;
+	ssize_t ret;
+	size_t n;
 	char *p;
 
 	ret = acpi_aml_lock_write(crc, ACPI_AML_IN_USER);
@@ -652,7 +652,7 @@ static int acpi_aml_write_user(const char __user *buf, int len)
 	/* sync tail before inserting cmds */
 	smp_mb();
 	p = &crc->buf[crc->head];
-	n = min(len, circ_space_to_end(crc));
+	n = min_t(size_t, len, circ_space_to_end(crc));
 	if (copy_from_user(p, buf, n)) {
 		ret = -EFAULT;
 		goto out;
@@ -663,14 +663,14 @@ static int acpi_aml_write_user(const char __user *buf, int len)
 	ret = n;
 out:
 	acpi_aml_unlock_fifo(ACPI_AML_IN_USER, ret >= 0);
-	return n;
+	return ret;
 }
 
 static ssize_t acpi_aml_write(struct file *file, const char __user *buf,
 			      size_t count, loff_t *ppos)
 {
-	int ret = 0;
-	int size = 0;
+	ssize_t ret = 0;
+	ssize_t size = 0;
 
 	if (!count)
 		return 0;
diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c
index 2a99f5eb6962..7ec1dc04fd11 100644
--- a/drivers/acpi/acpi_processor.c
+++ b/drivers/acpi/acpi_processor.c
@@ -815,7 +815,7 @@ bool acpi_processor_claim_cst_control(void)
 	cst_control_claimed = true;
 	return true;
 }
-EXPORT_SYMBOL_GPL(acpi_processor_claim_cst_control);
+EXPORT_SYMBOL_NS_GPL(acpi_processor_claim_cst_control, "ACPI_PROCESSOR_IDLE");
 
 /**
  * acpi_processor_evaluate_cst - Evaluate the processor _CST control method.
@@ -994,5 +994,5 @@ end:
 
 	return ret;
 }
-EXPORT_SYMBOL_GPL(acpi_processor_evaluate_cst);
+EXPORT_SYMBOL_NS_GPL(acpi_processor_evaluate_cst, "ACPI_PROCESSOR_IDLE");
 #endif /* CONFIG_ACPI_PROCESSOR_CSTATE */
diff --git a/drivers/acpi/acpi_tad.c b/drivers/acpi/acpi_tad.c
index 91d7d90c47da..33418dd6768a 100644
--- a/drivers/acpi/acpi_tad.c
+++ b/drivers/acpi/acpi_tad.c
@@ -565,6 +565,9 @@ static void acpi_tad_remove(struct platform_device *pdev)
 
 	pm_runtime_get_sync(dev);
 
+	if (dd->capabilities & ACPI_TAD_RT)
+		sysfs_remove_group(&dev->kobj, &acpi_tad_time_attr_group);
+
 	if (dd->capabilities & ACPI_TAD_DC_WAKE)
 		sysfs_remove_group(&dev->kobj, &acpi_tad_dc_attr_group);
 
diff --git a/drivers/acpi/acpica/acdebug.h b/drivers/acpi/acpica/acdebug.h
index fe6d38b43c9a..91241bd6917a 100644
--- a/drivers/acpi/acpica/acdebug.h
+++ b/drivers/acpi/acpica/acdebug.h
@@ -37,7 +37,7 @@ struct acpi_db_argument_info {
 struct acpi_db_execute_walk {
 	u32 count;
 	u32 max_count;
-	char name_seg[ACPI_NAMESEG_SIZE + 1] ACPI_NONSTRING;
+	char name_seg[ACPI_NAMESEG_SIZE + 1];
 };
 
 #define PARAM_LIST(pl)                  pl
diff --git a/drivers/acpi/acpica/aclocal.h b/drivers/acpi/acpica/aclocal.h
index 0c41f0097e8d..f98640086f4e 100644
--- a/drivers/acpi/acpica/aclocal.h
+++ b/drivers/acpi/acpica/aclocal.h
@@ -1141,7 +1141,7 @@ struct acpi_port_info {
 #define ACPI_RESOURCE_NAME_PIN_GROUP_FUNCTION   0x91
 #define ACPI_RESOURCE_NAME_PIN_GROUP_CONFIG     0x92
 #define ACPI_RESOURCE_NAME_CLOCK_INPUT          0x93
-#define ACPI_RESOURCE_NAME_LARGE_MAX            0x94
+#define ACPI_RESOURCE_NAME_LARGE_MAX            0x93
 
 /*****************************************************************************
  *
diff --git a/drivers/acpi/acpica/acpredef.h b/drivers/acpi/acpica/acpredef.h
index 76c5ed02e916..da2c45880cc7 100644
--- a/drivers/acpi/acpica/acpredef.h
+++ b/drivers/acpi/acpica/acpredef.h
@@ -450,7 +450,8 @@ const union acpi_predefined_info acpi_gbl_predefined_methods[] = {
 
 	{{"_DSM",
 	  METHOD_4ARGS(ACPI_TYPE_BUFFER, ACPI_TYPE_INTEGER, ACPI_TYPE_INTEGER,
-		       ACPI_TYPE_ANY) | ARG_COUNT_IS_MINIMUM,
+		       ACPI_TYPE_ANY | ACPI_TYPE_PACKAGE) |
+		       ARG_COUNT_IS_MINIMUM,
 	  METHOD_RETURNS(ACPI_RTYPE_ALL)}},	/* Must return a value, but it can be of any type */
 
 	{{"_DSS", METHOD_1ARGS(ACPI_TYPE_INTEGER),
diff --git a/drivers/acpi/acpica/dsmethod.c b/drivers/acpi/acpica/dsmethod.c
index fef6fb29ece4..45ec32e81903 100644
--- a/drivers/acpi/acpica/dsmethod.c
+++ b/drivers/acpi/acpica/dsmethod.c
@@ -462,7 +462,6 @@ acpi_ds_call_control_method(struct acpi_thread_state *thread,
 	struct acpi_walk_state *next_walk_state = NULL;
 	union acpi_operand_object *obj_desc;
 	struct acpi_evaluate_info *info;
-	u32 i;
 
 	ACPI_FUNCTION_TRACE_PTR(ds_call_control_method, this_walk_state);
 
@@ -484,10 +483,17 @@ acpi_ds_call_control_method(struct acpi_thread_state *thread,
 	}
 
 	if (this_walk_state->num_operands < obj_desc->method.param_count) {
-		ACPI_ERROR((AE_INFO, "Missing argument for method [%4.4s]",
+		ACPI_ERROR((AE_INFO, "Missing argument(s) for method [%4.4s]",
 			    acpi_ut_get_node_name(method_node)));
 
-		return_ACPI_STATUS(AE_AML_UNINITIALIZED_ARG);
+		return_ACPI_STATUS(AE_AML_TOO_FEW_ARGUMENTS);
+	}
+
+	else if (this_walk_state->num_operands > obj_desc->method.param_count) {
+		ACPI_ERROR((AE_INFO, "Too many arguments for method [%4.4s]",
+			    acpi_ut_get_node_name(method_node)));
+
+		return_ACPI_STATUS(AE_AML_TOO_MANY_ARGUMENTS);
 	}
 
 	/* Init for new method, possibly wait on method mutex */
@@ -546,14 +552,7 @@ acpi_ds_call_control_method(struct acpi_thread_state *thread,
 	 * Delete the operands on the previous walkstate operand stack
 	 * (they were copied to new objects)
 	 */
-	for (i = 0; i < obj_desc->method.param_count; i++) {
-		acpi_ut_remove_reference(this_walk_state->operands[i]);
-		this_walk_state->operands[i] = NULL;
-	}
-
-	/* Clear the operand stack */
-
-	this_walk_state->num_operands = 0;
+	acpi_ds_clear_operands(this_walk_state);
 
 	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 			  "**** Begin nested execution of [%4.4s] **** WalkState=%p\n",
diff --git a/drivers/acpi/acpica/evglock.c b/drivers/acpi/acpica/evglock.c
index fa3e0d00d1ca..df2a4ab0e0da 100644
--- a/drivers/acpi/acpica/evglock.c
+++ b/drivers/acpi/acpica/evglock.c
@@ -42,6 +42,10 @@ acpi_status acpi_ev_init_global_lock_handler(void)
 		return_ACPI_STATUS(AE_OK);
 	}
 
+	if (!acpi_gbl_use_global_lock) {
+		return_ACPI_STATUS(AE_OK);
+	}
+
 	/* Attempt installation of the global lock handler */
 
 	status = acpi_install_fixed_event_handler(ACPI_EVENT_GLOBAL,
diff --git a/drivers/acpi/acpica/psopinfo.c b/drivers/acpi/acpica/psopinfo.c
index 1c8044ffcb97..532ea307a675 100644
--- a/drivers/acpi/acpica/psopinfo.c
+++ b/drivers/acpi/acpica/psopinfo.c
@@ -34,7 +34,7 @@ static const u8 acpi_gbl_argument_count[] =
 
 const struct acpi_opcode_info *acpi_ps_get_opcode_info(u16 opcode)
 {
-#ifdef ACPI_DEBUG_OUTPUT
+#if defined ACPI_ASL_COMPILER && defined ACPI_DEBUG_OUTPUT
 	const char *opcode_name = "Unknown AML opcode";
 #endif
 
@@ -102,11 +102,11 @@ const struct acpi_opcode_info *acpi_ps_get_opcode_info(u16 opcode)
 	default:
 		break;
 	}
-#endif
 
 	/* Unknown AML opcode */
 
 	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "%s [%4.4X]\n", opcode_name, opcode));
+#endif
 
 	return (&acpi_gbl_aml_op_info[_UNK]);
 }
diff --git a/drivers/acpi/acpica/tbprint.c b/drivers/acpi/acpica/tbprint.c
index fd64460a2e26..049f6c2f1e32 100644
--- a/drivers/acpi/acpica/tbprint.c
+++ b/drivers/acpi/acpica/tbprint.c
@@ -121,6 +121,14 @@ acpi_tb_print_table_header(acpi_physical_address address,
 			   ACPI_CAST_PTR(struct acpi_table_rsdp,
 					 header)->revision,
 			   local_header.oem_id));
+	} else if (acpi_gbl_CDAT && !acpi_ut_valid_nameseg(header->signature)) {
+
+		/* CDAT does not use the common ACPI table header */
+
+		ACPI_INFO(("%-4.4s 0x%8.8X%8.8X %06X",
+			   ACPI_SIG_CDAT, ACPI_FORMAT_UINT64(address),
+			   ACPI_CAST_PTR(struct acpi_table_cdat,
+					 header)->length));
 	} else {
 		/* Standard ACPI table with full common header */
 
diff --git a/drivers/acpi/apei/einj-core.c b/drivers/acpi/apei/einj-core.c
index 2561b045acc7..3c87953dbd19 100644
--- a/drivers/acpi/apei/einj-core.c
+++ b/drivers/acpi/apei/einj-core.c
@@ -656,6 +656,43 @@ static int __einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2,
 	return rc;
 }
 
+/* Allow almost all types of address except MMIO. */
+static bool is_allowed_range(u64 base_addr, u64 size)
+{
+	int i;
+	/*
+	 * MMIO region is usually claimed with IORESOURCE_MEM + IORES_DESC_NONE.
+	 * However, IORES_DESC_NONE is treated like a wildcard when we check if
+	 * region intersects with known resource. So do an allow list check for
+	 * IORES_DESCs that definitely or most likely not MMIO.
+	 */
+	int non_mmio_desc[] = {
+		IORES_DESC_CRASH_KERNEL,
+		IORES_DESC_ACPI_TABLES,
+		IORES_DESC_ACPI_NV_STORAGE,
+		IORES_DESC_PERSISTENT_MEMORY,
+		IORES_DESC_PERSISTENT_MEMORY_LEGACY,
+		/* Treat IORES_DESC_DEVICE_PRIVATE_MEMORY as MMIO. */
+		IORES_DESC_RESERVED,
+		IORES_DESC_SOFT_RESERVED,
+	};
+
+	if (region_intersects(base_addr, size, IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE)
+			      == REGION_INTERSECTS)
+		return true;
+
+	for (i = 0; i < ARRAY_SIZE(non_mmio_desc); ++i) {
+		if (region_intersects(base_addr, size, IORESOURCE_MEM, non_mmio_desc[i])
+				      == REGION_INTERSECTS)
+			return true;
+	}
+
+	if (arch_is_platform_page(base_addr))
+		return true;
+
+	return false;
+}
+
 /* Inject the specified hardware error */
 int einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2, u64 param3,
 		      u64 param4)
@@ -702,19 +739,15 @@ int einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2, u64 param3,
 	 * Disallow crazy address masks that give BIOS leeway to pick
 	 * injection address almost anywhere. Insist on page or
 	 * better granularity and that target address is normal RAM or
-	 * NVDIMM.
+	 * as long as is not MMIO.
 	 */
 	base_addr = param1 & param2;
 	size = ~param2 + 1;
 
-	if (((param2 & PAGE_MASK) != PAGE_MASK) ||
-	    ((region_intersects(base_addr, size, IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE)
-				!= REGION_INTERSECTS) &&
-	     (region_intersects(base_addr, size, IORESOURCE_MEM, IORES_DESC_PERSISTENT_MEMORY)
-				!= REGION_INTERSECTS) &&
-	     (region_intersects(base_addr, size, IORESOURCE_MEM, IORES_DESC_SOFT_RESERVED)
-				!= REGION_INTERSECTS) &&
-	     !arch_is_platform_page(base_addr)))
+	if ((param2 & PAGE_MASK) != PAGE_MASK)
+		return -EINVAL;
+
+	if (!is_allowed_range(base_addr, size))
 		return -EINVAL;
 
 	if (is_zero_pfn(base_addr >> PAGE_SHIFT))
diff --git a/drivers/acpi/apei/erst-dbg.c b/drivers/acpi/apei/erst-dbg.c
index 246076341e8c..ff0e8bf8e97a 100644
--- a/drivers/acpi/apei/erst-dbg.c
+++ b/drivers/acpi/apei/erst-dbg.c
@@ -60,9 +60,8 @@ static long erst_dbg_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
 
 	switch (cmd) {
 	case APEI_ERST_CLEAR_RECORD:
-		rc = copy_from_user(&record_id, (void __user *)arg,
-				    sizeof(record_id));
-		if (rc)
+		if (copy_from_user(&record_id, (void __user *)arg,
+				   sizeof(record_id)))
 			return -EFAULT;
 		return erst_clear(record_id);
 	case APEI_ERST_GET_RECORD_COUNT:
@@ -175,8 +174,7 @@ static ssize_t erst_dbg_write(struct file *filp, const char __user *ubuf,
 		erst_dbg_buf = p;
 		erst_dbg_buf_len = usize;
 	}
-	rc = copy_from_user(erst_dbg_buf, ubuf, usize);
-	if (rc) {
+	if (copy_from_user(erst_dbg_buf, ubuf, usize)) {
 		rc = -EFAULT;
 		goto out;
 	}
diff --git a/drivers/acpi/device_sysfs.c b/drivers/acpi/device_sysfs.c
index 3961fc47152c..cd199fbe4dc9 100644
--- a/drivers/acpi/device_sysfs.c
+++ b/drivers/acpi/device_sysfs.c
@@ -464,7 +464,7 @@ static ssize_t description_show(struct device *dev,
 
 	buf[result++] = '\n';
 
-	kfree(str_obj);
+	ACPI_FREE(str_obj);
 
 	return result;
 }
diff --git a/drivers/acpi/fan_core.c b/drivers/acpi/fan_core.c
index 095502086b41..04ff608f2ff0 100644
--- a/drivers/acpi/fan_core.c
+++ b/drivers/acpi/fan_core.c
@@ -203,18 +203,6 @@ static const struct thermal_cooling_device_ops fan_cooling_ops = {
  * --------------------------------------------------------------------------
 */
 
-static bool acpi_fan_has_fst(struct acpi_device *device)
-{
-	return acpi_has_method(device->handle, "_FST");
-}
-
-static bool acpi_fan_is_acpi4(struct acpi_device *device)
-{
-	return acpi_has_method(device->handle, "_FIF") &&
-	       acpi_has_method(device->handle, "_FPS") &&
-	       acpi_has_method(device->handle, "_FSL");
-}
-
 static int acpi_fan_get_fif(struct acpi_device *device)
 {
 	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
@@ -331,9 +319,11 @@ static int acpi_fan_probe(struct platform_device *pdev)
 	device->driver_data = fan;
 	platform_set_drvdata(pdev, fan);
 
-	if (acpi_fan_has_fst(device)) {
+	if (acpi_has_method(device->handle, "_FST")) {
 		fan->has_fst = true;
-		fan->acpi4 = acpi_fan_is_acpi4(device);
+		fan->acpi4 = acpi_has_method(device->handle, "_FIF") &&
+				acpi_has_method(device->handle, "_FPS") &&
+				acpi_has_method(device->handle, "_FSL");
 	}
 
 	if (fan->acpi4) {
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index e2781864fdce..63354972ab0b 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -140,6 +140,7 @@ int __acpi_device_uevent_modalias(const struct acpi_device *adev,
 /* --------------------------------------------------------------------------
                                   Power Resource
    -------------------------------------------------------------------------- */
+void acpi_power_resources_init(void);
 void acpi_power_resources_list_free(struct list_head *list);
 int acpi_extract_power_resources(union acpi_object *package, unsigned int start,
 				 struct list_head *list);
diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index 630fe0a34bc6..ad81aa03fe2f 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -22,6 +22,7 @@
 #include <linux/acpi.h>
 #include <linux/slab.h>
 #include <linux/interrupt.h>
+#include <linux/string_choices.h>
 
 struct acpi_prt_entry {
 	struct acpi_pci_id	id;
@@ -468,7 +469,7 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
 	dev_dbg(&dev->dev, "PCI INT %c%s -> GSI %u (%s, %s) -> IRQ %d\n",
 		pin_name(pin), link_desc, gsi,
 		(triggering == ACPI_LEVEL_SENSITIVE) ? "level" : "edge",
-		(polarity == ACPI_ACTIVE_LOW) ? "low" : "high", dev->irq);
+		str_low_high(polarity == ACPI_ACTIVE_LOW), dev->irq);
 
 	kfree(entry);
 	return 0;
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index b7243d7563b1..361a7721a6a8 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -23,6 +23,7 @@
 
 #define pr_fmt(fmt) "ACPI: PM: " fmt
 
+#include <linux/delay.h>
 #include <linux/dmi.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
@@ -63,6 +64,9 @@ struct acpi_power_resource_entry {
 	struct acpi_power_resource *resource;
 };
 
+static bool hp_eb_gp12pxp_quirk;
+static bool unused_power_resources_quirk;
+
 static LIST_HEAD(acpi_power_resource_list);
 static DEFINE_MUTEX(power_resource_list_lock);
 
@@ -992,6 +996,38 @@ struct acpi_device *acpi_add_power_resource(acpi_handle handle)
 }
 
 #ifdef CONFIG_ACPI_SLEEP
+static bool resource_is_gp12pxp(acpi_handle handle)
+{
+	const char *path;
+	bool ret;
+
+	path = acpi_handle_path(handle);
+	ret = path && strcmp(path, "\\_SB_.PCI0.GP12.PXP_") == 0;
+	kfree(path);
+
+	return ret;
+}
+
+static void acpi_resume_on_eb_gp12pxp(struct acpi_power_resource *resource)
+{
+	acpi_handle_notice(resource->device.handle,
+			   "HP EB quirk - turning OFF then ON\n");
+
+	__acpi_power_off(resource);
+	__acpi_power_on(resource);
+
+	/*
+	 * Use the same delay as DSDT uses in modem _RST method.
+	 *
+	 * Otherwise we get "Unable to change power state from unknown to D0,
+	 * device inaccessible" error for the modem PCI device after thaw.
+	 *
+	 * This power resource is normally being enabled only during thaw (once)
+	 * so this wait is not a performance issue.
+	 */
+	msleep(200);
+}
+
 void acpi_resume_power_resources(void)
 {
 	struct acpi_power_resource *resource;
@@ -1013,8 +1049,14 @@ void acpi_resume_power_resources(void)
 
 		if (state == ACPI_POWER_RESOURCE_STATE_OFF
 		    && resource->ref_count) {
-			acpi_handle_debug(resource->device.handle, "Turning ON\n");
-			__acpi_power_on(resource);
+			if (hp_eb_gp12pxp_quirk &&
+			    resource_is_gp12pxp(resource->device.handle)) {
+				acpi_resume_on_eb_gp12pxp(resource);
+			} else {
+				acpi_handle_debug(resource->device.handle,
+						  "Turning ON\n");
+				__acpi_power_on(resource);
+			}
 		}
 
 		mutex_unlock(&resource->resource_lock);
@@ -1024,6 +1066,41 @@ void acpi_resume_power_resources(void)
 }
 #endif
 
+static const struct dmi_system_id dmi_hp_elitebook_gp12pxp_quirk[] = {
+/*
+ * This laptop (and possibly similar models too) has power resource called
+ * "GP12.PXP_" for its WWAN modem.
+ *
+ * For this power resource to turn ON power for the modem it needs certain
+ * internal flag called "ONEN" to be set.
+ * This flag only gets set from this power resource "_OFF" method, while the
+ * actual modem power gets turned off during suspend by "GP12.PTS" method
+ * called from the global "_PTS" (Prepare To Sleep) method.
+ * On the other hand, this power resource "_OFF" method implementation just
+ * sets the aforementioned flag without actually doing anything else (it
+ * doesn't contain any code to actually turn off power).
+ *
+ * The above means that when upon hibernation finish we try to set this
+ * power resource back ON since its "_STA" method returns 0 (while the resource
+ * is still considered in use) its "_ON" method won't do anything since
+ * that "ONEN" flag is not set.
+ * Overall, this means the modem is dead until laptop is rebooted since its
+ * power has been cut by "_PTS" and its PCI configuration was lost and not able
+ * to be restored.
+ *
+ * The easiest way to workaround the issue is to call this power resource
+ * "_OFF" method before calling the "_ON" method to make sure the "ONEN"
+ * flag gets properly set.
+ */
+	{
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "HP"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook 855 G7 Notebook PC"),
+		},
+	},
+	{}
+};
+
 static const struct dmi_system_id dmi_leave_unused_power_resources_on[] = {
 	{
 		/*
@@ -1046,7 +1123,7 @@ void acpi_turn_off_unused_power_resources(void)
 {
 	struct acpi_power_resource *resource;
 
-	if (dmi_check_system(dmi_leave_unused_power_resources_on))
+	if (unused_power_resources_quirk)
 		return;
 
 	mutex_lock(&power_resource_list_lock);
@@ -1065,3 +1142,10 @@ void acpi_turn_off_unused_power_resources(void)
 
 	mutex_unlock(&power_resource_list_lock);
 }
+
+void __init acpi_power_resources_init(void)
+{
+	hp_eb_gp12pxp_quirk = dmi_check_system(dmi_hp_elitebook_gp12pxp_quirk);
+	unused_power_resources_quirk =
+		dmi_check_system(dmi_leave_unused_power_resources_on);
+}
diff --git a/drivers/acpi/prmt.c b/drivers/acpi/prmt.c
index be033bbb126a..6792d4385eee 100644
--- a/drivers/acpi/prmt.c
+++ b/drivers/acpi/prmt.c
@@ -150,15 +150,28 @@ acpi_parse_prmt(union acpi_subtable_headers *header, const unsigned long end)
 		th = &tm->handlers[cur_handler];
 
 		guid_copy(&th->guid, (guid_t *)handler_info->handler_guid);
+
+		/*
+		 * Print an error message if handler_address is NULL, the parse of VA also
+		 * can be skipped.
+		 */
+		if (unlikely(!handler_info->handler_address)) {
+			pr_info("Skipping handler with NULL address for GUID: %pUL",
+					(guid_t *)handler_info->handler_guid);
+			continue;
+		}
+
 		th->handler_addr =
 			(void *)efi_pa_va_lookup(&th->guid, handler_info->handler_address);
 		/*
-		 * Print a warning message if handler_addr is zero which is not expected to
-		 * ever happen.
+		 * Print a warning message and skip the parse of VA if handler_addr is zero
+		 * which is not expected to ever happen.
 		 */
-		if (unlikely(!th->handler_addr))
+		if (unlikely(!th->handler_addr)) {
 			pr_warn("Failed to find VA of handler for GUID: %pUL, PA: 0x%llx",
 				&th->guid, handler_info->handler_address);
+			continue;
+		}
 
 		th->static_data_buffer_addr =
 			efi_pa_va_lookup(&th->guid, handler_info->static_data_buffer_address);
diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c
index 65e779be64ff..5d824435b26b 100644
--- a/drivers/acpi/processor_driver.c
+++ b/drivers/acpi/processor_driver.c
@@ -166,8 +166,7 @@ static int __acpi_processor_start(struct acpi_device *device)
 	if (result && !IS_ENABLED(CONFIG_ACPI_CPU_FREQ_PSS))
 		dev_dbg(&device->dev, "CPPC data invalid or not present\n");
 
-	if (!cpuidle_get_driver() || cpuidle_get_driver() == &acpi_idle_driver)
-		acpi_processor_power_init(pr);
+	acpi_processor_power_init(pr);
 
 	acpi_pss_perf_init(pr);
 
@@ -263,6 +262,8 @@ static int __init acpi_processor_driver_init(void)
 	if (result < 0)
 		return result;
 
+	acpi_processor_register_idle_driver();
+
 	result = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN,
 				   "acpi/cpu-drv:online",
 				   acpi_soft_cpu_online, NULL);
@@ -301,6 +302,7 @@ static void __exit acpi_processor_driver_exit(void)
 
 	cpuhp_remove_state_nocalls(hp_online);
 	cpuhp_remove_state_nocalls(CPUHP_ACPI_CPUDRV_DEAD);
+	acpi_processor_unregister_idle_driver();
 	driver_unregister(&acpi_processor_driver);
 }
 
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 2c2dc559e0f8..22b051b94a86 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -51,7 +51,7 @@ module_param(latency_factor, uint, 0644);
 
 static DEFINE_PER_CPU(struct cpuidle_device *, acpi_cpuidle_device);
 
-struct cpuidle_driver acpi_idle_driver = {
+static struct cpuidle_driver acpi_idle_driver = {
 	.name =		"acpi_idle",
 	.owner =	THIS_MODULE,
 };
@@ -998,11 +998,6 @@ end:
 	return ret;
 }
 
-/*
- * flat_state_cnt - the number of composite LPI states after the process of flattening
- */
-static int flat_state_cnt;
-
 /**
  * combine_lpi_states - combine local and parent LPI states to form a composite LPI state
  *
@@ -1045,9 +1040,10 @@ static void stash_composite_state(struct acpi_lpi_states_array *curr_level,
 	curr_level->composite_states[curr_level->composite_states_size++] = t;
 }
 
-static int flatten_lpi_states(struct acpi_processor *pr,
-			      struct acpi_lpi_states_array *curr_level,
-			      struct acpi_lpi_states_array *prev_level)
+static unsigned int flatten_lpi_states(struct acpi_processor *pr,
+				       unsigned int flat_state_cnt,
+				       struct acpi_lpi_states_array *curr_level,
+				       struct acpi_lpi_states_array *prev_level)
 {
 	int i, j, state_count = curr_level->size;
 	struct acpi_lpi_state *p, *t = curr_level->entries;
@@ -1087,7 +1083,7 @@ static int flatten_lpi_states(struct acpi_processor *pr,
 	}
 
 	kfree(curr_level->entries);
-	return 0;
+	return flat_state_cnt;
 }
 
 int __weak acpi_processor_ffh_lpi_probe(unsigned int cpu)
@@ -1102,6 +1098,7 @@ static int acpi_processor_get_lpi_info(struct acpi_processor *pr)
 	acpi_handle handle = pr->handle, pr_ahandle;
 	struct acpi_device *d = NULL;
 	struct acpi_lpi_states_array info[2], *tmp, *prev, *curr;
+	unsigned int state_count;
 
 	/* make sure our architecture has support */
 	ret = acpi_processor_ffh_lpi_probe(pr->id);
@@ -1114,14 +1111,13 @@ static int acpi_processor_get_lpi_info(struct acpi_processor *pr)
 	if (!acpi_has_method(handle, "_LPI"))
 		return -EINVAL;
 
-	flat_state_cnt = 0;
 	prev = &info[0];
 	curr = &info[1];
 	handle = pr->handle;
 	ret = acpi_processor_evaluate_lpi(handle, prev);
 	if (ret)
 		return ret;
-	flatten_lpi_states(pr, prev, NULL);
+	state_count = flatten_lpi_states(pr, 0, prev, NULL);
 
 	status = acpi_get_parent(handle, &pr_ahandle);
 	while (ACPI_SUCCESS(status)) {
@@ -1143,18 +1139,19 @@ static int acpi_processor_get_lpi_info(struct acpi_processor *pr)
 			break;
 
 		/* flatten all the LPI states in this level of hierarchy */
-		flatten_lpi_states(pr, curr, prev);
+		state_count = flatten_lpi_states(pr, state_count, curr, prev);
 
 		tmp = prev, prev = curr, curr = tmp;
 
 		status = acpi_get_parent(handle, &pr_ahandle);
 	}
 
-	pr->power.count = flat_state_cnt;
 	/* reset the index after flattening */
-	for (i = 0; i < pr->power.count; i++)
+	for (i = 0; i < state_count; i++)
 		pr->power.lpi_states[i].index = i;
 
+	pr->power.count = state_count;
+
 	/* Tell driver that _LPI is supported. */
 	pr->flags.has_lpi = 1;
 	pr->flags.power = 1;
@@ -1360,74 +1357,102 @@ int acpi_processor_power_state_has_changed(struct acpi_processor *pr)
 	return 0;
 }
 
-static int acpi_processor_registered;
+void acpi_processor_register_idle_driver(void)
+{
+	struct acpi_processor *pr;
+	int ret = -ENODEV;
+	int cpu;
+
+	/*
+	 * Acpi idle driver is used by all possible CPUs.
+	 * Install the idle handler by the processor power info of one in them.
+	 * Note that we use previously set idle handler will be used on
+	 * platforms that only support C1.
+	 */
+	for_each_cpu(cpu, (struct cpumask *)cpu_possible_mask) {
+		pr = per_cpu(processors, cpu);
+		if (!pr)
+			continue;
+
+		ret = acpi_processor_get_power_info(pr);
+		if (!ret) {
+			pr->flags.power_setup_done = 1;
+			acpi_processor_setup_cpuidle_states(pr);
+			break;
+		}
+	}
+
+	if (ret) {
+		pr_debug("No ACPI power information from any CPUs.\n");
+		return;
+	}
+
+	ret = cpuidle_register_driver(&acpi_idle_driver);
+	if (ret) {
+		pr_debug("register %s failed.\n", acpi_idle_driver.name);
+		return;
+	}
+	pr_debug("%s registered with cpuidle.\n", acpi_idle_driver.name);
+}
+
+void acpi_processor_unregister_idle_driver(void)
+{
+	cpuidle_unregister_driver(&acpi_idle_driver);
+}
 
-int acpi_processor_power_init(struct acpi_processor *pr)
+void acpi_processor_power_init(struct acpi_processor *pr)
 {
-	int retval;
 	struct cpuidle_device *dev;
 
+	/*
+	 * The code below only works if the current cpuidle driver is the ACPI
+	 * idle driver.
+	 */
+	if (cpuidle_get_driver() != &acpi_idle_driver)
+		return;
+
 	if (disabled_by_idle_boot_param())
-		return 0;
+		return;
 
 	acpi_processor_cstate_first_run_checks();
 
 	if (!acpi_processor_get_power_info(pr))
 		pr->flags.power_setup_done = 1;
 
-	/*
-	 * Install the idle handler if processor power management is supported.
-	 * Note that we use previously set idle handler will be used on
-	 * platforms that only support C1.
-	 */
-	if (pr->flags.power) {
-		/* Register acpi_idle_driver if not already registered */
-		if (!acpi_processor_registered) {
-			acpi_processor_setup_cpuidle_states(pr);
-			retval = cpuidle_register_driver(&acpi_idle_driver);
-			if (retval)
-				return retval;
-			pr_debug("%s registered with cpuidle\n",
-				 acpi_idle_driver.name);
-		}
+	if (!pr->flags.power)
+		return;
 
-		dev = kzalloc(sizeof(*dev), GFP_KERNEL);
-		if (!dev)
-			return -ENOMEM;
-		per_cpu(acpi_cpuidle_device, pr->id) = dev;
+	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+	if (!dev)
+		return;
 
-		acpi_processor_setup_cpuidle_dev(pr, dev);
+	per_cpu(acpi_cpuidle_device, pr->id) = dev;
 
-		/* Register per-cpu cpuidle_device. Cpuidle driver
-		 * must already be registered before registering device
-		 */
-		retval = cpuidle_register_device(dev);
-		if (retval) {
-			if (acpi_processor_registered == 0)
-				cpuidle_unregister_driver(&acpi_idle_driver);
-			return retval;
-		}
-		acpi_processor_registered++;
+	acpi_processor_setup_cpuidle_dev(pr, dev);
+
+	/*
+	 * Register a cpuidle device for this CPU.  The cpuidle driver using
+	 * this device is expected to be registered.
+	 */
+	if (cpuidle_register_device(dev)) {
+		per_cpu(acpi_cpuidle_device, pr->id) = NULL;
+		kfree(dev);
 	}
-	return 0;
 }
 
-int acpi_processor_power_exit(struct acpi_processor *pr)
+void acpi_processor_power_exit(struct acpi_processor *pr)
 {
 	struct cpuidle_device *dev = per_cpu(acpi_cpuidle_device, pr->id);
 
 	if (disabled_by_idle_boot_param())
-		return 0;
+		return;
 
 	if (pr->flags.power) {
 		cpuidle_unregister_device(dev);
-		acpi_processor_registered--;
-		if (acpi_processor_registered == 0)
-			cpuidle_unregister_driver(&acpi_idle_driver);
-
 		kfree(dev);
 	}
 
 	pr->flags.power_setup_done = 0;
-	return 0;
 }
+
+MODULE_IMPORT_NS("ACPI_PROCESSOR_IDLE");
diff --git a/drivers/acpi/processor_thermal.c b/drivers/acpi/processor_thermal.c
index 1219adb11ab9..c7b1dc5687ec 100644
--- a/drivers/acpi/processor_thermal.c
+++ b/drivers/acpi/processor_thermal.c
@@ -62,19 +62,14 @@ static int phys_package_first_cpu(int cpu)
 	return 0;
 }
 
-static int cpu_has_cpufreq(unsigned int cpu)
+static bool cpu_has_cpufreq(unsigned int cpu)
 {
-	struct cpufreq_policy *policy;
-
 	if (!acpi_processor_cpufreq_init)
 		return 0;
 
-	policy = cpufreq_cpu_get(cpu);
-	if (policy) {
-		cpufreq_cpu_put(policy);
-		return 1;
-	}
-	return 0;
+	struct cpufreq_policy *policy __free(put_cpufreq_policy) = cpufreq_cpu_get(cpu);
+
+	return policy != NULL;
 }
 
 static int cpufreq_get_max_state(unsigned int cpu)
@@ -93,12 +88,31 @@ static int cpufreq_get_cur_state(unsigned int cpu)
 	return reduction_step(cpu);
 }
 
+static bool cpufreq_update_thermal_limit(unsigned int cpu, struct acpi_processor *pr)
+{
+	unsigned long max_freq;
+	int ret;
+
+	struct cpufreq_policy *policy __free(put_cpufreq_policy) = cpufreq_cpu_get(cpu);
+	if (!policy)
+		return false;
+
+	max_freq = (policy->cpuinfo.max_freq *
+		(100 - reduction_step(cpu) * cpufreq_thermal_reduction_pctg)) / 100;
+
+	ret = freq_qos_update_request(&pr->thermal_req, max_freq);
+	if (ret < 0) {
+		pr_warn("Failed to update thermal freq constraint: CPU%d (%d)\n",
+			pr->id, ret);
+	}
+
+	return true;
+}
+
 static int cpufreq_set_cur_state(unsigned int cpu, int state)
 {
-	struct cpufreq_policy *policy;
 	struct acpi_processor *pr;
-	unsigned long max_freq;
-	int i, ret;
+	int i;
 
 	if (!cpu_has_cpufreq(cpu))
 		return 0;
@@ -120,20 +134,8 @@ static int cpufreq_set_cur_state(unsigned int cpu, int state)
 		if (unlikely(!freq_qos_request_active(&pr->thermal_req)))
 			continue;
 
-		policy = cpufreq_cpu_get(i);
-		if (!policy)
+		if (!cpufreq_update_thermal_limit(i, pr))
 			return -EINVAL;
-
-		max_freq = (policy->cpuinfo.max_freq *
-			    (100 - reduction_step(i) * cpufreq_thermal_reduction_pctg)) / 100;
-
-		cpufreq_cpu_put(policy);
-
-		ret = freq_qos_update_request(&pr->thermal_req, max_freq);
-		if (ret < 0) {
-			pr_warn("Failed to update thermal freq constraint: CPU%d (%d)\n",
-				pr->id, ret);
-		}
 	}
 	return 0;
 }
diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c
index 436019d96027..54baa23a9e5a 100644
--- a/drivers/acpi/property.c
+++ b/drivers/acpi/property.c
@@ -83,6 +83,7 @@ static bool acpi_nondev_subnode_extract(union acpi_object *desc,
 					struct fwnode_handle *parent)
 {
 	struct acpi_data_node *dn;
+	acpi_handle scope = NULL;
 	bool result;
 
 	if (acpi_graph_ignore_port(handle))
@@ -98,59 +99,45 @@ static bool acpi_nondev_subnode_extract(union acpi_object *desc,
 	INIT_LIST_HEAD(&dn->data.properties);
 	INIT_LIST_HEAD(&dn->data.subnodes);
 
-	result = acpi_extract_properties(handle, desc, &dn->data);
-
-	if (handle) {
-		acpi_handle scope;
-		acpi_status status;
+	/*
+	 * The scope for the completion of relative pathname segments and
+	 * subnode object lookup is the one of the namespace node (device)
+	 * containing the object that has returned the package.  That is, it's
+	 * the scope of that object's parent device.
+	 */
+	if (handle)
+		acpi_get_parent(handle, &scope);
 
-		/*
-		 * The scope for the subnode object lookup is the one of the
-		 * namespace node (device) containing the object that has
-		 * returned the package.  That is, it's the scope of that
-		 * object's parent.
-		 */
-		status = acpi_get_parent(handle, &scope);
-		if (ACPI_SUCCESS(status)
-		    && acpi_enumerate_nondev_subnodes(scope, desc, &dn->data,
-						      &dn->fwnode))
-			result = true;
-	} else if (acpi_enumerate_nondev_subnodes(NULL, desc, &dn->data,
-						  &dn->fwnode)) {
+	/*
+	 * Extract properties from the _DSD-equivalent package pointed to by
+	 * desc and use scope (if not NULL) for the completion of relative
+	 * pathname segments.
+	 *
+	 * The extracted properties will be held in the new data node dn.
+	 */
+	result = acpi_extract_properties(scope, desc, &dn->data);
+	/*
+	 * Look for subnodes in the _DSD-equivalent package pointed to by desc
+	 * and create child nodes of dn if there are any.
+	 */
+	if (acpi_enumerate_nondev_subnodes(scope, desc, &dn->data, &dn->fwnode))
 		result = true;
-	}
-
-	if (result) {
-		dn->handle = handle;
-		dn->data.pointer = desc;
-		list_add_tail(&dn->sibling, list);
-		return true;
-	}
-
-	kfree(dn);
-	acpi_handle_debug(handle, "Invalid properties/subnodes data, skipping\n");
-	return false;
-}
 
-static bool acpi_nondev_subnode_data_ok(acpi_handle handle,
-					const union acpi_object *link,
-					struct list_head *list,
-					struct fwnode_handle *parent)
-{
-	struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER };
-	acpi_status status;
-
-	status = acpi_evaluate_object_typed(handle, NULL, NULL, &buf,
-					    ACPI_TYPE_PACKAGE);
-	if (ACPI_FAILURE(status))
+	if (!result) {
+		kfree(dn);
+		acpi_handle_debug(handle, "Invalid properties/subnodes data, skipping\n");
 		return false;
+	}
 
-	if (acpi_nondev_subnode_extract(buf.pointer, handle, link, list,
-					parent))
-		return true;
+	/*
+	 * This will be NULL if the desc package is embedded in an outer
+	 * _DSD-equivalent package and its scope cannot be determined.
+	 */
+	dn->handle = handle;
+	dn->data.pointer = desc;
+	list_add_tail(&dn->sibling, list);
 
-	ACPI_FREE(buf.pointer);
-	return false;
+	return true;
 }
 
 static bool acpi_nondev_subnode_ok(acpi_handle scope,
@@ -158,9 +145,16 @@ static bool acpi_nondev_subnode_ok(acpi_handle scope,
 				   struct list_head *list,
 				   struct fwnode_handle *parent)
 {
+	struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER };
 	acpi_handle handle;
 	acpi_status status;
 
+	/*
+	 * If the scope is unknown, the _DSD-equivalent package being parsed
+	 * was embedded in an outer _DSD-equivalent package as a result of
+	 * direct evaluation of an object pointed to by a reference.  In that
+	 * case, using a pathname as the target object pointer is invalid.
+	 */
 	if (!scope)
 		return false;
 
@@ -169,7 +163,17 @@ static bool acpi_nondev_subnode_ok(acpi_handle scope,
 	if (ACPI_FAILURE(status))
 		return false;
 
-	return acpi_nondev_subnode_data_ok(handle, link, list, parent);
+	status = acpi_evaluate_object_typed(handle, NULL, NULL, &buf,
+					    ACPI_TYPE_PACKAGE);
+	if (ACPI_FAILURE(status))
+		return false;
+
+	if (acpi_nondev_subnode_extract(buf.pointer, handle, link, list,
+					parent))
+		return true;
+
+	ACPI_FREE(buf.pointer);
+	return false;
 }
 
 static bool acpi_add_nondev_subnodes(acpi_handle scope,
@@ -180,9 +184,12 @@ static bool acpi_add_nondev_subnodes(acpi_handle scope,
 	bool ret = false;
 	int i;
 
+	/*
+	 * Every element in the links package is expected to represent a link
+	 * to a non-device node in a tree containing device-specific data.
+	 */
 	for (i = 0; i < links->package.count; i++) {
 		union acpi_object *link, *desc;
-		acpi_handle handle;
 		bool result;
 
 		link = &links->package.elements[i];
@@ -190,26 +197,53 @@ static bool acpi_add_nondev_subnodes(acpi_handle scope,
 		if (link->package.count != 2)
 			continue;
 
-		/* The first one must be a string. */
+		/* The first one (the key) must be a string. */
 		if (link->package.elements[0].type != ACPI_TYPE_STRING)
 			continue;
 
-		/* The second one may be a string, a reference or a package. */
+		/* The second one (the target) may be a string or a package. */
 		switch (link->package.elements[1].type) {
 		case ACPI_TYPE_STRING:
+			/*
+			 * The string is expected to be a full pathname or a
+			 * pathname segment relative to the given scope.  That
+			 * pathname is expected to point to an object returning
+			 * a package that contains _DSD-equivalent information.
+			 */
 			result = acpi_nondev_subnode_ok(scope, link, list,
 							 parent);
 			break;
-		case ACPI_TYPE_LOCAL_REFERENCE:
-			handle = link->package.elements[1].reference.handle;
-			result = acpi_nondev_subnode_data_ok(handle, link, list,
-							     parent);
-			break;
 		case ACPI_TYPE_PACKAGE:
+			/*
+			 * This happens when a reference is used in AML to
+			 * point to the target.  Since the target is expected
+			 * to be a named object, a reference to it will cause it
+			 * to be avaluated in place and its return package will
+			 * be embedded in the links package at the location of
+			 * the reference.
+			 *
+			 * The target package is expected to contain _DSD-
+			 * equivalent information, but the scope in which it
+			 * is located in the original AML is unknown.  Thus
+			 * it cannot contain pathname segments represented as
+			 * strings because there is no way to build full
+			 * pathnames out of them.
+			 */
+			acpi_handle_debug(scope, "subnode %s: Unknown scope\n",
+					  link->package.elements[0].string.pointer);
 			desc = &link->package.elements[1];
 			result = acpi_nondev_subnode_extract(desc, NULL, link,
 							     list, parent);
 			break;
+		case ACPI_TYPE_LOCAL_REFERENCE:
+			/*
+			 * It is not expected to see any local references in
+			 * the links package because referencing a named object
+			 * should cause it to be evaluated in place.
+			 */
+			acpi_handle_info(scope, "subnode %s: Unexpected reference\n",
+					 link->package.elements[0].string.pointer);
+			fallthrough;
 		default:
 			result = false;
 			break;
@@ -369,6 +403,9 @@ static void acpi_untie_nondev_subnodes(struct acpi_device_data *data)
 	struct acpi_data_node *dn;
 
 	list_for_each_entry(dn, &data->subnodes, sibling) {
+		if (!dn->handle)
+			continue;
+
 		acpi_detach_data(dn->handle, acpi_nondev_subnode_tag);
 
 		acpi_untie_nondev_subnodes(&dn->data);
@@ -383,6 +420,9 @@ static bool acpi_tie_nondev_subnodes(struct acpi_device_data *data)
 		acpi_status status;
 		bool ret;
 
+		if (!dn->handle)
+			continue;
+
 		status = acpi_attach_data(dn->handle, acpi_nondev_subnode_tag, dn);
 		if (ACPI_FAILURE(status) && status != AE_ALREADY_EXISTS) {
 			acpi_handle_err(dn->handle, "Can't tag data node\n");
diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index b1ab192d7a08..d16906f46484 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -17,6 +17,7 @@
 #include <linux/slab.h>
 #include <linux/irq.h>
 #include <linux/dmi.h>
+#include <linux/string_choices.h>
 
 #ifdef CONFIG_X86
 #define valid_IRQ(i) (((i) != 0) && ((i) != 2))
@@ -511,6 +512,13 @@ static const struct dmi_system_id irq1_level_low_skip_override[] = {
 		},
 	},
 	{
+		/* Asus Vivobook Pro N6506CU* */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+			DMI_MATCH(DMI_BOARD_NAME, "N6506CU"),
+		},
+	},
+	{
 		/* LG Electronics 17U70P */
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "LG Electronics"),
@@ -773,7 +781,7 @@ static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
 			pr_warn("ACPI: IRQ %d override to %s%s, %s%s\n", gsi,
 				t ? "level" : "edge",
 				trig == triggering ? "" : "(!)",
-				p ? "low" : "high",
+				str_low_high(p),
 				pol == polarity ? "" : "(!)");
 			triggering = trig;
 			polarity = pol;
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index fb1fe9f3b1a3..880a544d73cd 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -845,6 +845,8 @@ static bool acpi_info_matches_ids(struct acpi_device_info *info,
 static const char * const acpi_ignore_dep_ids[] = {
 	"PNP0D80", /* Windows-compatible System Power Management Controller */
 	"INT33BD", /* Intel Baytrail Mailbox Device */
+	"INTC10DE", /* Intel CVS LNL */
+	"INTC10E0", /* Intel CVS ARL */
 	"LATT2021", /* Lattice FW Update Client Driver */
 	NULL
 };
@@ -2702,6 +2704,7 @@ void __init acpi_scan_init(void)
 	acpi_memory_hotplug_init();
 	acpi_watchdog_init();
 	acpi_pnp_init();
+	acpi_power_resources_init();
 	acpi_int340x_thermal_init();
 	acpi_init_lpit();
 
diff --git a/drivers/acpi/spcr.c b/drivers/acpi/spcr.c
index cd36a97b0ea2..d4d52d5e9016 100644
--- a/drivers/acpi/spcr.c
+++ b/drivers/acpi/spcr.c
@@ -141,12 +141,23 @@ int __init acpi_parse_spcr(bool enable_earlycon, bool enable_console)
 	case ACPI_DBG2_16550_NVIDIA:
 		uart = "uart";
 		break;
+	case ACPI_DBG2_RISCV_SBI_CON:
+		uart = "sbi";
+		break;
 	default:
 		err = -ENOENT;
 		goto done;
 	}
 
-	switch (table->baud_rate) {
+	/*
+	 * SPCR 1.09 defines Precise Baud Rate Filed contains a specific
+	 * non-zero baud rate which overrides the value of the Configured
+	 * Baud Rate field. If this field is zero or not present, Configured
+	 * Baud Rate is used.
+	 */
+	if (table->precise_baudrate)
+		baud_rate = table->precise_baudrate;
+	else switch (table->baud_rate) {
 	case 0:
 		/*
 		 * SPCR 1.04 defines 0 as a preconfigured state of UART.
diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
index fa9bb8c8ce95..57fc8bc56166 100644
--- a/drivers/acpi/tables.c
+++ b/drivers/acpi/tables.c
@@ -408,7 +408,7 @@ static const char table_sigs[][ACPI_NAMESEG_SIZE] __nonstring_array __initconst
 	ACPI_SIG_PSDT, ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT,
 	ACPI_SIG_IORT, ACPI_SIG_NFIT, ACPI_SIG_HMAT, ACPI_SIG_PPTT,
 	ACPI_SIG_NHLT, ACPI_SIG_AEST, ACPI_SIG_CEDT, ACPI_SIG_AGDI,
-	ACPI_SIG_NBFT };
+	ACPI_SIG_NBFT, ACPI_SIG_SWFT};
 
 #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
 
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 5c2defe55898..8537395b417b 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -924,7 +924,7 @@ static int acpi_thermal_suspend(struct device *dev)
 static int acpi_thermal_resume(struct device *dev)
 {
 	struct acpi_thermal *tz;
-	int i, j, power_state;
+	int i, j;
 
 	if (!dev)
 		return -EINVAL;
@@ -939,10 +939,8 @@ static int acpi_thermal_resume(struct device *dev)
 		if (!acpi_thermal_trip_valid(acpi_trip))
 			break;
 
-		for (j = 0; j < acpi_trip->devices.count; j++) {
-			acpi_bus_update_power(acpi_trip->devices.handles[j],
-					      &power_state);
-		}
+		for (j = 0; j < acpi_trip->devices.count; j++)
+			acpi_bus_update_power(acpi_trip->devices.handles[j], NULL);
 	}
 
 	acpi_queue_thermal_check(tz);
diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index d507d5e08435..4cf74f173c78 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -948,6 +948,14 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
 		DMI_MATCH(DMI_PRODUCT_NAME, "Mipad2"),
 		},
 	},
+	/* https://gitlab.freedesktop.org/drm/amd/-/issues/4512 */
+	{
+	 .callback = video_detect_force_native,
+	 .matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+		DMI_MATCH(DMI_PRODUCT_NAME, "82K8"),
+		},
+	},
 	{ },
 };
 
diff --git a/drivers/pnp/isapnp/core.c b/drivers/pnp/isapnp/core.c
index d2ff76e74a05..219f96f2aaaf 100644
--- a/drivers/pnp/isapnp/core.c
+++ b/drivers/pnp/isapnp/core.c
@@ -27,6 +27,7 @@
 #include <linux/init.h>
 #include <linux/isapnp.h>
 #include <linux/mutex.h>
+#include <linux/string_choices.h>
 #include <asm/io.h>
 
 #include "../base.h"
@@ -1037,7 +1038,7 @@ static int __init isapnp_init(void)
 	if (cards)
 		printk(KERN_INFO
 		       "isapnp: %i Plug & Play card%s detected total\n", cards,
-		       cards > 1 ? "s" : "");
+		       str_plural(cards));
 	else
 		printk(KERN_INFO "isapnp: No Plug & Play card found\n");
 
diff --git a/include/acpi/acexcep.h b/include/acpi/acexcep.h
index 53c98f5fe3c3..a2db36d18419 100644
--- a/include/acpi/acexcep.h
+++ b/include/acpi/acexcep.h
@@ -173,8 +173,10 @@ struct acpi_exception_info {
 #define AE_AML_TARGET_TYPE              EXCEP_AML (0x0023)
 #define AE_AML_PROTOCOL                 EXCEP_AML (0x0024)
 #define AE_AML_BUFFER_LENGTH            EXCEP_AML (0x0025)
+#define AE_AML_TOO_FEW_ARGUMENTS        EXCEP_AML (0x0026)
+#define AE_AML_TOO_MANY_ARGUMENTS       EXCEP_AML (0x0027)
 
-#define AE_CODE_AML_MAX                 0x0025
+#define AE_CODE_AML_MAX                 0x0027
 
 /*
  * Internal exceptions used for control
@@ -353,7 +355,11 @@ static const struct acpi_exception_info acpi_gbl_exception_names_aml[] = {
 		  "A target operand of an incorrect type was encountered"),
 	EXCEP_TXT("AE_AML_PROTOCOL", "Violation of a fixed ACPI protocol"),
 	EXCEP_TXT("AE_AML_BUFFER_LENGTH",
-		  "The length of the buffer is invalid/incorrect")
+		  "The length of the buffer is invalid/incorrect"),
+	EXCEP_TXT("AE_AML_TOO_FEW_ARGUMENTS",
+		  "There are fewer than expected method arguments"),
+	EXCEP_TXT("AE_AML_TOO_MANY_ARGUMENTS",
+		  "There are too many arguments for this method")
 };
 
 static const struct acpi_exception_info acpi_gbl_exception_names_ctrl[] = {
diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h
index b49396aa4058..e65a2afe9250 100644
--- a/include/acpi/acpixf.h
+++ b/include/acpi/acpixf.h
@@ -12,7 +12,7 @@
 
 /* Current ACPICA subsystem version in YYYYMMDD format */
 
-#define ACPI_CA_VERSION                 0x20250404
+#define ACPI_CA_VERSION                 0x20250807
 
 #include <acpi/acconfig.h>
 #include <acpi/actypes.h>
@@ -214,6 +214,12 @@ ACPI_INIT_GLOBAL(u8, acpi_gbl_osi_data, 0);
 ACPI_INIT_GLOBAL(u8, acpi_gbl_reduced_hardware, FALSE);
 
 /*
+ * ACPI Global Lock is mainly used for systems with SMM, so no-SMM systems
+ * (such as loong_arch) may not have and not use Global Lock.
+ */
+ACPI_INIT_GLOBAL(u8, acpi_gbl_use_global_lock, TRUE);
+
+/*
  * Maximum timeout for While() loop iterations before forced method abort.
  * This mechanism is intended to prevent infinite loops during interpreter
  * execution within a host kernel.
diff --git a/include/acpi/actbl.h b/include/acpi/actbl.h
index 243097a3da63..8a67d4ea6e3f 100644
--- a/include/acpi/actbl.h
+++ b/include/acpi/actbl.h
@@ -73,7 +73,7 @@ struct acpi_table_header {
 	char oem_id[ACPI_OEM_ID_SIZE] ACPI_NONSTRING;	/* ASCII OEM identification */
 	char oem_table_id[ACPI_OEM_TABLE_ID_SIZE] ACPI_NONSTRING;	/* ASCII OEM table identification */
 	u32 oem_revision;	/* OEM revision number */
-	char asl_compiler_id[ACPI_NAMESEG_SIZE];	/* ASCII ASL compiler vendor ID */
+	char asl_compiler_id[ACPI_NAMESEG_SIZE] ACPI_NONSTRING;	/* ASCII ASL compiler vendor ID */
 	u32 asl_compiler_revision;	/* ASL compiler version */
 };
 
diff --git a/include/acpi/actbl1.h b/include/acpi/actbl1.h
index 99fd1588ff38..0b4c332df25c 100644
--- a/include/acpi/actbl1.h
+++ b/include/acpi/actbl1.h
@@ -565,6 +565,7 @@ struct acpi_cedt_cfmws_target_element {
 #define ACPI_CEDT_CFMWS_RESTRICT_VOLATILE   (1<<2)
 #define ACPI_CEDT_CFMWS_RESTRICT_PMEM       (1<<3)
 #define ACPI_CEDT_CFMWS_RESTRICT_FIXED      (1<<4)
+#define ACPI_CEDT_CFMWS_RESTRICT_BI         (1<<5)
 
 /* 2: CXL XOR Interleave Math Structure */
 
diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h
index 048f5f47f8b8..f726bce3eb84 100644
--- a/include/acpi/actbl2.h
+++ b/include/acpi/actbl2.h
@@ -57,6 +57,7 @@
 #define ACPI_SIG_SDEI           "SDEI"	/* Software Delegated Exception Interface Table */
 #define ACPI_SIG_SDEV           "SDEV"	/* Secure Devices table */
 #define ACPI_SIG_SVKL           "SVKL"	/* Storage Volume Key Location Table */
+#define ACPI_SIG_SWFT           "SWFT"	/* SoundWire File Table */
 #define ACPI_SIG_TDEL           "TDEL"	/* TD Event Log Table */
 
 /*
@@ -3479,6 +3480,26 @@ enum acpi_svkl_format {
 };
 
 /*******************************************************************************
+ * SWFT - SoundWire File Table
+ *
+ * Conforms to "Discovery and Configuration (DisCo) Specification for SoundWire"
+ * Version 2.1, 2 October 2023
+ *
+ ******************************************************************************/
+struct acpi_sw_file {
+	u16 vendor_id;
+	u32 file_id;
+	u16 file_version;
+	u32 file_length;
+	u8 data[];
+};
+
+struct acpi_table_swft {
+	struct acpi_table_header header;
+	struct acpi_sw_file files[];
+};
+
+/*******************************************************************************
  *
  * TDEL - TD-Event Log
  *        From: "Guest-Host-Communication Interface (GHCI) for Intel
diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index d0eccbd920e5..7146a8e9e9c2 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -417,32 +417,15 @@ static inline void acpi_processor_throttling_init(void) {}
 #endif	/* CONFIG_ACPI_CPU_FREQ_PSS */
 
 /* in processor_idle.c */
-extern struct cpuidle_driver acpi_idle_driver;
 #ifdef CONFIG_ACPI_PROCESSOR_IDLE
-int acpi_processor_power_init(struct acpi_processor *pr);
-int acpi_processor_power_exit(struct acpi_processor *pr);
+void acpi_processor_power_init(struct acpi_processor *pr);
+void acpi_processor_power_exit(struct acpi_processor *pr);
 int acpi_processor_power_state_has_changed(struct acpi_processor *pr);
 int acpi_processor_hotplug(struct acpi_processor *pr);
-#else
-static inline int acpi_processor_power_init(struct acpi_processor *pr)
-{
-	return -ENODEV;
-}
-
-static inline int acpi_processor_power_exit(struct acpi_processor *pr)
-{
-	return -ENODEV;
-}
-
-static inline int acpi_processor_power_state_has_changed(struct acpi_processor *pr)
-{
-	return -ENODEV;
-}
-
-static inline int acpi_processor_hotplug(struct acpi_processor *pr)
-{
-	return -ENODEV;
-}
+void acpi_processor_register_idle_driver(void);
+void acpi_processor_unregister_idle_driver(void);
+int acpi_processor_ffh_lpi_probe(unsigned int cpu);
+int acpi_processor_ffh_lpi_enter(struct acpi_lpi_state *lpi);
 #endif /* CONFIG_ACPI_PROCESSOR_IDLE */
 
 /* in processor_thermal.c */
@@ -465,11 +448,6 @@ static inline void acpi_thermal_cpufreq_exit(struct cpufreq_policy *policy)
 }
 #endif	/* CONFIG_CPU_FREQ */
 
-#ifdef CONFIG_ACPI_PROCESSOR_IDLE
-extern int acpi_processor_ffh_lpi_probe(unsigned int cpu);
-extern int acpi_processor_ffh_lpi_enter(struct acpi_lpi_state *lpi);
-#endif
-
 void acpi_processor_init_invariance_cppc(void);
 
 #endif
diff --git a/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c b/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c
index 9741e7503591..de93067a5da3 100644
--- a/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c
+++ b/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c
@@ -995,7 +995,7 @@ static acpi_status osl_list_customized_tables(char *directory)
 {
 	void *table_dir;
 	u32 instance;
-	char temp_name[ACPI_NAMESEG_SIZE];
+	char temp_name[ACPI_NAMESEG_SIZE] ACPI_NONSTRING;
 	char *filename;
 	acpi_status status = AE_OK;
 
@@ -1312,7 +1312,7 @@ osl_get_customized_table(char *pathname,
 {
 	void *table_dir;
 	u32 current_instance = 0;
-	char temp_name[ACPI_NAMESEG_SIZE];
+	char temp_name[ACPI_NAMESEG_SIZE] ACPI_NONSTRING;
 	char table_filename[PATH_MAX];
 	char *filename;
 	acpi_status status;
diff --git a/tools/power/acpi/tools/acpidump/apdump.c b/tools/power/acpi/tools/acpidump/apdump.c
index bf30143efbdc..7a6223aa703c 100644
--- a/tools/power/acpi/tools/acpidump/apdump.c
+++ b/tools/power/acpi/tools/acpidump/apdump.c
@@ -86,9 +86,10 @@ u8 ap_is_valid_checksum(struct acpi_table_header *table)
 	if (ACPI_FAILURE(status)) {
 		fprintf(stderr, "%4.4s: Warning: wrong checksum in table\n",
 			table->signature);
+		return (FALSE);
 	}
 
-	return (AE_OK);
+	return (TRUE);
 }
 
 /******************************************************************************
diff --git a/tools/power/acpi/tools/acpidump/apfiles.c b/tools/power/acpi/tools/acpidump/apfiles.c
index 75db0091e275..d6b8a201480b 100644
--- a/tools/power/acpi/tools/acpidump/apfiles.c
+++ b/tools/power/acpi/tools/acpidump/apfiles.c
@@ -103,7 +103,7 @@ int ap_open_output_file(char *pathname)
 
 int ap_write_to_binary_file(struct acpi_table_header *table, u32 instance)
 {
-	char filename[ACPI_NAMESEG_SIZE + 16] ACPI_NONSTRING;
+	char filename[ACPI_NAMESEG_SIZE + 16];
 	char instance_str[16];
 	ACPI_FILE file;
 	acpi_size actual;