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| author | Luiz Angelo Daros de Luca <luizluca@gmail.com> | 2026-07-27 21:22:17 -0300 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2026-07-27 17:53:28 -0700 |
| commit | 625a2c02a1c04571232a746fe188b4d9a8d63edd (patch) | |
| tree | 641e1956abccf7de4a0d48e86d2d220d03442e64 /tools/perf/scripts/python/flamegraph.py | |
| parent | d0b704e569ac3b8416d8e02270cdc9bf830ed395 (diff) | |
hwmon: (adt7470) Fix fans stuck in manual mode on I2C errors
During adt7470_read_temperatures(), the driver temporarily switches
the PWM channels to manual mode, performs the temperature collection,
and then restores the original configuration registers.
However, if an I2C transaction fails at any point after entering manual
mode, the function aborts and returns immediately. This leaves the
configuration registers un-restored, permanently trapping the fans in
manual mode.
Introduce a recovery path to ensure that the original PWM configuration
registers are always restored, even when intermediate I2C operations
fail.
Reported-by: sashiko-bot@kernel.org
Closes: https://lore.kernel.org/r/20260716213252.EACA71F000E9@smtp.kernel.org
Fixes: ef67959c4253 ("hwmon: (adt7470) Convert to use regmap")
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
Link: https://lore.kernel.org/r/20260727-adt7470_fixes-v2-1-598e38a46ba6@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'tools/perf/scripts/python/flamegraph.py')
0 files changed, 0 insertions, 0 deletions