linux/drivers/platform
Denis Arefev 41a125eb52 asus-laptop: Fix an uninitialized variable
commit 6c683c6887 upstream.

The value returned by acpi_evaluate_integer() is not checked,
but the result is not always successful, so it is necessary to
add a check of the returned value.

If the result remains negative during three iterations of the loop,
then the uninitialized variable 'val' will be used in the clamp_val()
macro, so it must be initialized with the current value of the 'curr'
variable.

In this case, the algorithm should be less noisy.

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

Fixes: b23910c219 ("asus-laptop: Pegatron Lucid accelerometer")
Cc: stable@vger.kernel.org
Signed-off-by: Denis Arefev <arefev@swemel.ru>
Link: https://lore.kernel.org/r/20250403122603.18172-1-arefev@swemel.ru
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2025-05-02 07:44:12 +02:00
..
chrome platform/chrome: cros_ec_typec: Check for EC driver 2025-02-01 18:24:01 +01:00
goldfish platform/goldfish: Convert pipe tasklet to threaded irq 2021-01-27 14:57:06 +01:00
mellanox platform/mellanox: Check devm_hwmon_device_register_with_groups() return value 2023-12-13 18:36:35 +01:00
mips platform: mips: cpu_hwmon: Disable driver on unsupported hardware 2024-08-19 05:45:20 +02:00
olpc platform/olpc: Fix uninitialized data in debugfs write 2022-08-17 14:23:58 +02:00
surface platform/surface: aggregator_registry: Add support for Surface Laptop Go 3 2024-10-17 15:10:33 +02:00
x86 asus-laptop: Fix an uninitialized variable 2025-05-02 07:44:12 +02:00
Kconfig platform: Add Surface platform directory 2020-10-27 12:51:03 +01:00
Makefile platform: Add Surface platform directory 2020-10-27 12:51:03 +01:00