gpiolib: acpi: use BIT_ULL() for u64 mask in address space handler

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[ Upstream commit c0ae43d303 ]

The BIT() macro uses unsigned long, which is 32 bits on 32-bit
architectures. When iterating over GPIO pins with index >= 32,
the expression (*value & BIT(i)) causes undefined behavior due
to shifting by a value >= type width.

Since 'value' is a pointer to u64, use BIT_ULL() to ensure correct
64-bit mask on all architectures.

Found by Linux Verification Center (linuxtesting.org) with Svace.

Fixes: 2c4d00cb8f ("gpiolib: acpi: Use BIT() macro to increase readability")
Signed-off-by: Denis Sergeev <denserg.edu@gmail.com>
Reviewed-by: Mika Westerberg <westeri@kernel.org>
Link: https://lore.kernel.org/r/20260126035914.16586-1-denserg.edu@gmail.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Denis Sergeev 2026-01-26 06:59:14 +03:00 • committed by Greg Kroah-Hartman

parent ecb638fb9a

commit c0ce86d925

1 changed files with 1 additions and 1 deletions

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drivers/gpio/gpiolib-acpi-core.c

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