Merge branch 'pci/reset'

- Wait longer for devices to become ready after resume (as we do for reset)
  to accommodate Intel Titan Ridge xHCI devices (Mika Westerberg)

- Drop pci_bridge_wait_for_secondary_bus() timeout parameter since all
  callers pass the same value (Mika Westerberg)

- Extend D3hot delay for NVIDIA HDA controllers to avoid unrecoverable
  devices after a bus reset (Alex Williamson)

* pci/reset:
  PCI/PM: Extend D3hot delay for NVIDIA HDA controllers
  PCI/PM: Drop pci_bridge_wait_for_secondary_bus() timeout parameter
  PCI/PM: Increase wait time after resume

1 files changed, 12 insertions, 6 deletions

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 7a67611dc5f4..0b4f3b08f780 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -64,6 +64,14 @@ struct pci_pme_device {
 
 #define PME_TIMEOUT 1000 /* How long between PME checks */
 
+/*
+ * Devices may extend the 1 sec period through Request Retry Status
+ * completions (PCIe r6.0 sec 2.3.1).  The spec does not provide an upper
+ * limit, but 60 sec ought to be enough for any device to become
+ * responsive.
+ */
+#define PCIE_RESET_READY_POLL_MS 60000 /* msec */
+
 static void pci_dev_d3_sleep(struct pci_dev *dev)
 {
 	unsigned int delay_ms = max(dev->d3hot_delay, pci_pm_d3hot_delay);
@@ -4939,7 +4947,6 @@ static int pci_bus_max_d3cold_delay(const struct pci_bus *bus)
  * pci_bridge_wait_for_secondary_bus - Wait for secondary bus to be accessible
  * @dev: PCI bridge
  * @reset_type: reset type in human-readable form
- * @timeout: maximum time to wait for devices on secondary bus (milliseconds)
  *
  * Handle necessary delays before access to the devices on the secondary
  * side of the bridge are permitted after D3cold to D0 transition
@@ -4952,8 +4959,7 @@ static int pci_bus_max_d3cold_delay(const struct pci_bus *bus)
  * Return 0 on success or -ENOTTY if the first device on the secondary bus
  * failed to become accessible.
  */
-int pci_bridge_wait_for_secondary_bus(struct pci_dev *dev, char *reset_type,
-				      int timeout)
+int pci_bridge_wait_for_secondary_bus(struct pci_dev *dev, char *reset_type)
 {
 	struct pci_dev *child;
 	int delay;
@@ -5031,7 +5037,8 @@ int pci_bridge_wait_for_secondary_bus(struct pci_dev *dev, char *reset_type,
 		}
 	}
 
-	return pci_dev_wait(child, reset_type, timeout - delay);
+	return pci_dev_wait(child, reset_type,
+			    PCIE_RESET_READY_POLL_MS - delay);
 }
 
 void pci_reset_secondary_bus(struct pci_dev *dev)
@@ -5068,8 +5075,7 @@ int pci_bridge_secondary_bus_reset(struct pci_dev *dev)
 {
 	pcibios_reset_secondary_bus(dev);
 
-	return pci_bridge_wait_for_secondary_bus(dev, "bus reset",
-						 PCIE_RESET_READY_POLL_MS);
+	return pci_bridge_wait_for_secondary_bus(dev, "bus reset");
 }
 EXPORT_SYMBOL_GPL(pci_bridge_secondary_bus_reset);