| Message ID | 20221214131617.2447-3-johan+linaro@kernel.org (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | thermal: fix locking regressions in linux-next | expand |
On Wed, Dec 14, 2022 at 02:16:15PM +0100, Johan Hovold wrote: > The set_trip_temp() callback is used when changing the trip temperature > through sysfs. As it is called with the thermal-zone-device lock held > it must not use thermal_zone_get_trip() directly or it will deadlock. > > Fixes: 169865e317f2 ("thermal/drivers/exynos: Use generic thermal_zone_get_trip() function") > Signed-off-by: Johan Hovold <johan+linaro@kernel.org> > --- > drivers/thermal/samsung/exynos_tmu.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c > index 37465af59262..cf9028f80415 100644 > --- a/drivers/thermal/samsung/exynos_tmu.c > +++ b/drivers/thermal/samsung/exynos_tmu.c > @@ -354,7 +354,7 @@ static void exynos4210_tmu_set_trip_temp(struct exynos_tmu_data *data, > struct thermal_trip trip; > u8 ref, th_code; > > - if (thermal_zone_get_trip(data->tzd, 0, &trip)) > + if (__thermal_zone_get_trip(data->tzd, 0, &trip)) > return; > > ref = trip.temperature / MCELSIUS; As Daniel noted, this patch is not correct as this function is not actually a thermal_zone_device_ops::set_trip_temp callback. Please drop this one. Johan
diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c index 37465af59262..cf9028f80415 100644 --- a/drivers/thermal/samsung/exynos_tmu.c +++ b/drivers/thermal/samsung/exynos_tmu.c @@ -354,7 +354,7 @@ static void exynos4210_tmu_set_trip_temp(struct exynos_tmu_data *data, struct thermal_trip trip; u8 ref, th_code; - if (thermal_zone_get_trip(data->tzd, 0, &trip)) + if (__thermal_zone_get_trip(data->tzd, 0, &trip)) return; ref = trip.temperature / MCELSIUS;
The set_trip_temp() callback is used when changing the trip temperature through sysfs. As it is called with the thermal-zone-device lock held it must not use thermal_zone_get_trip() directly or it will deadlock. Fixes: 169865e317f2 ("thermal/drivers/exynos: Use generic thermal_zone_get_trip() function") Signed-off-by: Johan Hovold <johan+linaro@kernel.org> --- drivers/thermal/samsung/exynos_tmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)