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Add compatible strings for V853 family pinctrl.
Signed-off-by: Andras Szemzo <szemzo.andras@gmail.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/20250110123923.270626-3-szemzo.andras@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Replace ternary (condition ? "enable" : "disable") syntax with helpers
from string_choices.h because:
1. Simple function call with one argument is easier to read. Ternary
operator has three arguments and with wrapping might lead to quite
long code.
2. Is slightly shorter thus also easier to read.
3. It brings uniformity in the text - same string.
4. Allows deduping by the linker, which results in a smaller binary
file.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Antonio Borneo <antonio.borneo@foss.st.com>
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/20250114203602.1013275-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers into devel
pinctrl: renesas: Updates for v6.14 (take three)
- Fix PFC_MASK for RZ/V2H and RZ/G3E.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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DTS example in the bindings should be indented with 2- or 4-spaces and
aligned with opening '- |', so correct any differences like 3-spaces or
mixtures 2- and 4-spaces in one binding.
No functional changes here, but saves some comments during reviews of
new patches built on existing code.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Manikandan Muralidharan <manikandan.m@microchip.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/20250107125836.225447-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Some laptops have pins which are a wake source for S0i3/S3 but which
aren't a wake source for S4/S5 and which cause issues when left unmasked
during hibernation (S4).
For example HP EliteBook 855 G7 has pin #24 that causes instant wakeup
(hibernation failure) if left unmasked (it is a wake source only for
S0i3/S3).
GPIO pin #24 on this platform is likely dedicated to WWAN XMM7360
modem since this pin triggers wake notify to WWAN modem's parent PCIe
port.
Fix this by considering a pin a wake source only if it is marked as one
for the current suspend type (S0i3/S3 vs S4/S5).
Since Z-wake pins only make sense at runtime these were excluded from
both of suspend categories, so pins with only the Z-wake flag set are
effectively treated as non-wake pins.
Fixes: 2fff0b5e1a6b ("pinctrl: amd: Mask non-wake source pins with interrupt enabled at suspend")
Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/d4b2d076366fdd08a0c1cd9b7ecd91dc95e07269.1736184752.git.mail@maciej.szmigiero.name
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Convert the driver to clk_bulk*() API.
Add check for the return value of clk_bulk_enable() to catch
the potential error.
Fixes: 05d8af449d93 ("pinctrl: stm32: Keep pinctrl block clock enabled when LEVEL IRQ requested")
Signed-off-by: Mingwei Zheng <zmw12306@gmail.com>
Signed-off-by: Jiasheng Jiang <jiashengjiangcool@gmail.com>
Reviewed-by: Antonio Borneo <antonio.borneo@foss.st.com>
Link: https://lore.kernel.org/20250106220659.2640365-1-zmw12306@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers into devel
pinctrl: renesas: Updates for v6.14 (take two)
- Add support for alpha-numerical port references on the RZ/V2H SoC,
- Add support for the RZ/G3E (R9A09G047) Soc.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The PFC_MASK value for the PFC_mx registers is currently hardcoded to
0x07, which is correct for SoCs in the RZ/G2L family, but insufficient
for RZ/V2H and RZ/G3E, where the mask value should be 0x0f. This
discrepancy causes incorrect PFC register configuration on RZ/V2H and
RZ/G3E SoCs.
On RZ/G2L, the PFC_mx bitfields are also 4 bits wide, with bit 4 marked
as reserved. The reserved bits are documented to read as zero and be
ignored when written. Updating the PFC_MASK definition from 0x07 to
0x0f ensures compatibility with both SoC families while maintaining
correct behavior on RZ/G2L.
Fixes: 9bd95ac86e70 ("pinctrl: renesas: rzg2l: Add support for RZ/V2H SoC")
Cc: stable@vger.kernel.org
Reported-by: Hien Huynh <hien.huynh.px@renesas.com>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20250110221045.594596-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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lvds, lcd, dsi all shares the same GPIO D bank and lvds0
data 3 lines and lvds1 pins are missed, add them.
Signed-off-by: Parthiban Nallathambi <parthiban@linumiz.com>
Link: https://lore.kernel.org/20241227-a133-display-support-v1-10-13b52f71fb14@linumiz.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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This function is unused and causing compile errors, delete it.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Link: https://lore.kernel.org/linux-next/20250106164630.4447cd0d@canb.auug.org.au/
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Add pinctrl driver support for RZ/G3E SoC.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20241216195325.164212-5-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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renesas-pinctrl-for-v6.14
Renesas RZ/G3E Pin Control DT Binding Definitions
Pin control DT bindings and binding definitions for the Renesas RZ/G3E
(R9A09G047) SoC, shared by driver and DT source files.
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Currently r9a09g057_variable_pin_cfg table uses port 11 instead of port PB
as mentioned in the hardware manual. Update the r9a09g057_variable_pin_cfg
table with alpha-numeric port names to match with the hardware manual.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20241216195325.164212-4-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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renesas-pinctrl-for-v6.14
Renesas RZ/V2H Pin Control DT Binding Definitions
Pin control DT binding definitions for the Renesas RZ/V2H (R9A09G057)
SoC, shared by driver and DT source files.
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Add documentation for the pin controller found on the Renesas RZ/G3E
(R9A09G047) SoC. The RZ/G3E PFC is similar to the RZ/V2H SoC but has more
pins(P00-PS3).
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20241216195325.164212-3-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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RZ/V2H has ports P0-P9 and PA-PB. Add support for defining alpha-numerical
ports in DT using RZV2H_* macros.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20241216195325.164212-2-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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https://git.kernel.org/pub/scm/linux/kernel/git/pinctrl/samsung into devel
Samsung pinctrl drivers changes for v6.14
Two fixes for very old issues around error handling and also one
cleanup.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Add support for the 5 GPIO banks in the rk3562.
Signed-off-by: Steven Liu <steven.liu@rock-chips.com>
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/20241224093620.3815705-1-kever.yang@rock-chips.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Add the compatible string for the rk3562 SoC.
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/20241224093522.3815562-1-kever.yang@rock-chips.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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When some client does devm_pinctrl_get() followed by
pinctrl_select_state() that does pinmux first successfully and later
during config setting it sets the wrong drive strenght to the pin due to
which pinconf_apply_setting fails. Currently, on failure during config
setting is implemented as if pinmux has failed for one of the pin but
that does not seem right and need to undo the pinmux for all the pin if
config setting fails.
Current commit does a bit refactor to reuse the code and tries to clean
up mux setting on config setting failure.
Signed-off-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>
Link: https://lore.kernel.org/20241224084441.515870-1-mukesh.ojha@oss.qualcomm.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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This adds bindings for MT7988 pinctrl driver.
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/20241217085435.9586-4-linux@fw-web.de
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Add pinctrl driver for the MediaTek MT7988 SoC.
Signed-off-by: Sam Shih <sam.shih@mediatek.com>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
[correctly initialise for the function_desc structure]
Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/20241217085435.9586-3-linux@fw-web.de
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The MediaTek MT7988 SoC got some pins which only got configurable
pull-down but unlike previous designs there is no pull-up option.
Add new type MTK_PULL_PD_TYPE to support configuring such pins.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/20241217085435.9586-2-linux@fw-web.de
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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'struct ocelot_match_data and 'struct irq_chip' are not modified in this
driver.
Constifying these structures moves some data to a read-only section, so
increase overall security, especially when the structure holds some
function pointers.
On a x86_64, with allmodconfig:
Before:
======
text data bss dec hex filename
41459 9008 80 50547 c573 drivers/pinctrl/pinctrl-ocelot.o
After:
=====
text data bss dec hex filename
42803 7640 80 50523 c55b drivers/pinctrl/pinctrl-ocelot.o
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/32edcf0567fffd0b1a219e7e2dad7e0bd8c5aaf4.1734023550.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers into devel
pinctrl: renesas: Updates for v6.14
- Add audio clock pin support for the RZ/G3S SoC.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Add audio clock pins on the RZ/G3S SoC. These are used by audio IPs as
input pins to feed them with audio clocks.
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20241113133540.2005850-6-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Add check for the return value of clk_enable() to catch the potential
error.
Disable success clks in the error handling.
Change return type of nmk_gpio_glitch_slpm_init casade.
Fixes: 3a19805920f1 ("pinctrl: nomadik: move all Nomadik drivers to subdir")
Signed-off-by: Mingwei Zheng <zmw12306@gmail.com>
Signed-off-by: Jiasheng Jiang <jiashengjiangcool@gmail.com>
Link: https://lore.kernel.org/20241206221618.3453159-1-zmw12306@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Simplify "seq_printf(p, "%s", ...)" to "seq_puts(p, ...)".
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/9a5b38027ed674ca773fe28a3b3246631eae8834.1733404358.git.geert+renesas@glider.be
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The GPIO configuration differs for the spi0 clk, cs, miso, mosi pins.
Therefore, split the spi0 pin group and assign function to each pin
as per the specification.
Signed-off-by: Manikanta Mylavarapu <quic_mmanikan@quicinc.com>
Link: https://lore.kernel.org/20241217091308.3253897-3-quic_mmanikan@quicinc.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The GPIO configuration differs for the spi0 clk, cs, miso, mosi pins.
Therefore, split the spi0 pin group and document each pin function.
Fixes: b88752d3133b ("dt-bindings: pinctrl: qcom: add IPQ5424 pinctrl")
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Manikanta Mylavarapu <quic_mmanikan@quicinc.com>
Link: https://lore.kernel.org/20241217091308.3253897-2-quic_mmanikan@quicinc.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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It is based on MSM8916 driver with the pinctrl definitions from
Qualcomm's downstream MSM8917 driver.
Signed-off-by: Otto Pflüger <otto.pflueger@abscue.de>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
Link: https://lore.kernel.org/20241215-msm8917-v9-3-bacaa26f3eef@mainlining.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Add device tree bindings documentation for Qualcomm MSM8917
pinctrl driver.
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
Link: https://lore.kernel.org/20241215-msm8917-v9-2-bacaa26f3eef@mainlining.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Document the device tree bindings for the Renesas RZ/G3E SoC
Clock Pulse Generator (CPG).
Also define constants for the core clocks of the RZ/G3E SoC.
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20241203105005.103927-5-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Document the Renesas RZ/G3E SMARC Carrier-II EVK board which is based
on the Renesas RZ/G3E SMARC SoM. The RZ/G3E SMARC Carrier-II EVK
consists of an RZ/G3E SoM module and a SMARC Carrier-II carrier board.
The SoM module sits on top of the carrier board.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20241203105005.103927-4-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Document Renesas RZ/G3E (R9A09G047) SoC variants.
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20241203105005.103927-3-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Commit 954445c72fc7 ("pinctrl: samsung: Drop redundant node parameter in
samsung_banks_of_node_get()") modified the name of the function used to
release child nodes from samsung_drop_banks_of_node() to
samsung_banks_node_put(). Update the comment to use the current function
name.
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://lore.kernel.org/r/20241106-samsung-pinctrl-put-v1-2-de854e26dd03@gmail.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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fails
Commit 50ebd19e3585 ("pinctrl: samsung: drop pin banks references on
error paths") fixed the pin bank references on the error paths of the
probe function, but there is still an error path where this is not done.
If samsung_pinctrl_get_soc_data() does not fail, the child references
will have acquired, and they will need to be released in the error path
of platform_get_irq_optional(), as it is done in the following error
paths within the probe function.
Replace the direct return in the error path with a goto instruction to
the cleanup function.
Cc: stable@vger.kernel.org
Fixes: a382d568f144 ("pinctrl: samsung: Use platform_get_irq_optional() to get the interrupt")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://lore.kernel.org/r/20241106-samsung-pinctrl-put-v1-1-de854e26dd03@gmail.com
[krzysztof: change Fixes SHA to point to commit introducing the return
leading to OF node leak]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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exynos_irq_demux_eint16_31()
chained_irq_enter(() should be paired with a corresponding
chained_irq_exit().
Here, if clk_enable() fails, a early return occurs and chained_irq_exit()
is not called.
Add a new label and a goto for fix it.
Fixes: f9c744747973 ("pinctrl: samsung: support a bus clock")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: André Draszik <andre.draszik@linaro.org>
Link: https://lore.kernel.org/r/f148d823acfb3326a115bd49a0eed60f2345f909.1731844995.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c component probing support from Wolfram Sang:
"Add OF component probing.
Some devices are designed and manufactured with some components having
multiple drop-in replacement options. These components are often
connected to the mainboard via ribbon cables, having the same signals
and pin assignments across all options. These may include the display
panel and touchscreen on laptops and tablets, and the trackpad on
laptops. Sometimes which component option is used in a particular
device can be detected by some firmware provided identifier, other
times that information is not available, and the kernel has to try to
probe each device.
Instead of a delicate dance between drivers and device tree quirks,
this change introduces a simple I2C component probe function. For a
given class of devices on the same I2C bus, it will go through all of
them, doing a simple I2C read transfer and see which one of them
responds. It will then enable the device that responds"
* tag 'i2c-for-6.13-rc1-part3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
MAINTAINERS: fix typo in I2C OF COMPONENT PROBER
of: base: Document prefix argument for of_get_next_child_with_prefix()
i2c: Fix whitespace style issue
arm64: dts: mediatek: mt8173-elm-hana: Mark touchscreens and trackpads as fail
platform/chrome: Introduce device tree hardware prober
i2c: of-prober: Add GPIO support to simple helpers
i2c: of-prober: Add simple helpers for regulator support
i2c: Introduce OF component probe function
of: base: Add for_each_child_of_node_with_prefix()
of: dynamic: Add of_changeset_update_prop_string
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git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull bprintf() removal from Steven Rostedt:
- Remove unused bprintf() function, that was added with the rest of the
"bin-printf" functions.
These are functions that are used by trace_printk() that allows to
quickly save the format and arguments into the ring buffer without
the expensive processing of converting numbers to ASCII. Then on
output, at a much later time, the ring buffer is read and the string
processing occurs then. The bprintf() was added for consistency but
was never used. It can be safely removed.
* tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
printf: Remove unused 'bprintf'
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Borislav Petkov:
- Fix a case where posix timers with a thread-group-wide target would
miss signals if some of the group's threads are exiting
- Fix a hang caused by ndelay() calling the wrong delay function
__udelay()
- Fix a wrong offset calculation in adjtimex(2) when using ADJ_MICRO
(microsecond resolution) and a negative offset
* tag 'timers_urgent_for_v6.13_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
posix-timers: Target group sigqueue to current task only if not exiting
delay: Fix ndelay() spuriously treated as udelay()
ntp: Remove invalid cast in time offset math
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fixes from Borislav Petkov:
- Move the ->select callback to the correct ops structure in
irq-mvebu-sei to fix some Marvell Armada platforms
- Add a workaround for Hisilicon ITS erratum 162100801 which can cause
some virtual interrupts to get lost
- More platform_driver::remove() conversion
* tag 'irq_urgent_for_v6.13_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip: Switch back to struct platform_driver::remove()
irqchip/gicv3-its: Add workaround for hip09 ITS erratum 162100801
irqchip/irq-mvebu-sei: Move misplaced select() callback to SEI CP domain
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Borislav Petkov:
- Add a terminating zero end-element to the array describing AMD CPUs
affected by erratum 1386 so that the matching loop actually
terminates instead of going off into the weeds
- Update the boot protocol documentation to mention the fact that the
preferred address to load the kernel to is considered in the
relocatable kernel case too
- Flush the memory buffer containing the microcode patch after applying
microcode on AMD Zen1 and Zen2, to avoid unnecessary slowdowns
- Make sure the PPIN CPU feature flag is cleared on all CPUs if PPIN
has been disabled
* tag 'x86_urgent_for_v6.13_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/CPU/AMD: Terminate the erratum_1386_microcode array
x86/Documentation: Update algo in init_size description of boot protocol
x86/microcode/AMD: Flush patch buffer mapping after application
x86/mm: Carve out INVLPG inline asm for use by others
x86/cpu: Fix PPIN initialization
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The point behind strscpy() was to once and for all avoid all the
problems with 'strncpy()' and later broken "fixed" versions like
strlcpy() that just made things worse.
So strscpy not only guarantees NUL-termination (unlike strncpy), it also
doesn't do unnecessary padding at the destination. But at the same time
also avoids byte-at-a-time reads and writes by _allowing_ some extra NUL
writes - within the size, of course - so that the whole copy can be done
with word operations.
It is also stable in the face of a mutable source string: it explicitly
does not read the source buffer multiple times (so an implementation
using "strnlen()+memcpy()" would be wrong), and does not read the source
buffer past the size (like the mis-design that is strlcpy does).
Finally, the return value is designed to be simple and unambiguous: if
the string cannot be copied fully, it returns an actual negative error,
making error handling clearer and simpler (and the caller already knows
the size of the buffer). Otherwise it returns the string length of the
result.
However, there was one final stability issue that can be important to
callers: the stability of the destination buffer.
In particular, the same way we shouldn't read the source buffer more
than once, we should avoid doing multiple writes to the destination
buffer: first writing a potentially non-terminated string, and then
terminating it with NUL at the end does not result in a stable result
buffer.
Yes, it gives the right result in the end, but if the rule for the
destination buffer was that it is _always_ NUL-terminated even when
accessed concurrently with updates, the final byte of the buffer needs
to always _stay_ as a NUL byte.
[ Note that "final byte is NUL" here is literally about the final byte
in the destination array, not the terminating NUL at the end of the
string itself. There is no attempt to try to make concurrent reads and
writes give any kind of consistent string length or contents, but we
do want to guarantee that there is always at least that final
terminating NUL character at the end of the destination array if it
existed before ]
This is relevant in the kernel for the tsk->comm[] array, for example.
Even without locking (for either readers or writers), we want to know
that while the buffer contents may be garbled, it is always a valid C
string and always has a NUL character at 'comm[TASK_COMM_LEN-1]' (and
never has any "out of thin air" data).
So avoid any "copy possibly non-terminated string, and terminate later"
behavior, and write the destination buffer only once.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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bprintf() is unused. Remove it. It was added in the commit 4370aa4aa753
("vsprintf: add binary printf") but as far as I can see was never used,
unlike the other two functions in that patch.
Link: https://lore.kernel.org/20241002173147.210107-1-linux@treblig.org
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Acked-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux
Pull turbostat updates from Len Brown:
- assorted minor bug fixes
- assorted platform specific tweaks
- initial RAPL PSYS (SysWatt) support
* tag 'turbostat-2024.11.30' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux:
tools/power turbostat: 2024.11.30
tools/power turbostat: Add RAPL psys as a built-in counter
tools/power turbostat: Fix child's argument forwarding
tools/power turbostat: Force --no-perf in --dump mode
tools/power turbostat: Add support for /sys/class/drm/card1
tools/power turbostat: Cache graphics sysfs file descriptors during probe
tools/power turbostat: Consolidate graphics sysfs access
tools/power turbostat: Remove unnecessary fflush() call
tools/power turbostat: Enhance platform divergence description
tools/power turbostat: Add initial support for GraniteRapids-D
tools/power turbostat: Remove PC3 support on Lunarlake
tools/power turbostat: Rename arl_features to lnl_features
tools/power turbostat: Add back PC8 support on Arrowlake
tools/power turbostat: Remove PC7/PC9 support on MTL
tools/power turbostat: Honor --show CPU, even when even when num_cpus=1
tools/power turbostat: Fix trailing '\n' parsing
tools/power turbostat: Allow using cpu device in perf counters on hybrid platforms
tools/power turbostat: Fix column printing for PMT xtal_time counters
tools/power turbostat: fix GCC9 build regression
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git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
Pull PCI fix from Bjorn Helgaas:
- When removing a PCI device, only look up and remove a platform device
if there is an associated device node for which there could be a
platform device, to fix a merge window regression (Brian Norris)
* tag 'pci-v6.13-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci:
PCI/pwrctrl: Unregister platform device only if one actually exists
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git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/lsm
Pull ima fix from Paul Moore:
"One small patch to fix a function parameter / local variable naming
snafu that went up to you in the current merge window"
* tag 'lsm-pr-20241129' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/lsm:
ima: uncover hidden variable in ima_match_rules()
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Pull more block updates from Jens Axboe:
- NVMe pull request via Keith:
- Use correct srcu list traversal (Breno)
- Scatter-gather support for metadata (Keith)
- Fabrics shutdown race condition fix (Nilay)
- Persistent reservations updates (Guixin)
- Add the required bits for MD atomic write support for raid0/1/10
- Correct return value for unknown opcode in ublk
- Fix deadlock with zone revalidation
- Fix for the io priority request vs bio cleanups
- Use the correct unsigned int type for various limit helpers
- Fix for a race in loop
- Cleanup blk_rq_prep_clone() to prevent uninit-value warning and make
it easier for actual humans to read
- Fix potential UAF when iterating tags
- A few fixes for bfq-iosched UAF issues
- Fix for brd discard not decrementing the allocated page count
- Various little fixes and cleanups
* tag 'block-6.13-20242901' of git://git.kernel.dk/linux: (36 commits)
brd: decrease the number of allocated pages which discarded
block, bfq: fix bfqq uaf in bfq_limit_depth()
block: Don't allow an atomic write be truncated in blkdev_write_iter()
mq-deadline: don't call req_get_ioprio from the I/O completion handler
block: Prevent potential deadlock in blk_revalidate_disk_zones()
block: Remove extra part pointer NULLify in blk_rq_init()
nvme: tuning pr code by using defined structs and macros
nvme: introduce change ptpl and iekey definition
block: return bool from get_disk_ro and bdev_read_only
block: remove a duplicate definition for bdev_read_only
block: return bool from blk_rq_aligned
block: return unsigned int from blk_lim_dma_alignment_and_pad
block: return unsigned int from queue_dma_alignment
block: return unsigned int from bdev_io_opt
block: req->bio is always set in the merge code
block: don't bother checking the data direction for merges
block: blk-mq: fix uninit-value in blk_rq_prep_clone and refactor
Revert "block, bfq: merge bfq_release_process_ref() into bfq_put_cooperator()"
md/raid10: Atomic write support
md/raid1: Atomic write support
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