mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-24 11:25:43 +00:00
Code Issues Releases Wiki Activity

hwmon: (pwm-fan) Explicitly switch off fan power when setting pwm1_enable to 0

Browse source 
When pwm1_enable is changed from 1 to 0 while pwm1 == 0, the regulator
is not switched off as expected. The reason is that when the fan is
already off, ctx->enabled is false, so pwm_fan_power_off() will be a
no-op.

Handle this case explicitly in pwm_fan_update_enable() by calling
pwm_fan_switch_power() directly.

Fixes: b99152d4f0 ("hwmon: (pwm-fan) Switch regulator dynamically")
Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Link: https://lore.kernel.org/r/20221013135951.4902-1-matthias.schiffer@ew.tq-group.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Matthias Schiffer 2022-10-13 15:59:51 +02:00 committed by Guenter Roeck
parent b6291023f6
commit 3008d20f54
1 changed files with 4 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
drivers/hwmon/pwm-fan.c
View file

@ -257,7 +257,10 @@ static int pwm_fan_update_enable(struct pwm_fan_ctx *ctx, long val)
if (val == 0) {
/* Disable pwm-fan unconditionally */
ret = __set_pwm(ctx, 0);
if (ctx->enabled)
ret = __set_pwm(ctx, 0);
else
ret = pwm_fan_switch_power(ctx, false);
if (ret)
ctx->enable_mode = old_val;
pwm_fan_update_state(ctx, 0);