Messages in this thread Patch in this message | | | From | Armin Wolf <> | Subject | [PATCH] hwmon: (adt7470) Fix warning on module removal | Date | Thu, 7 Apr 2022 12:13:12 +0200 |
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When removing the adt7470 module, a warning might be printed:
do not call blocking ops when !TASK_RUNNING; state=1 set at [<ffffffffa006052b>] adt7470_update_thread+0x7b/0x130 [adt7470]
This happens because adt7470_update_thread() can leave the kthread in TASK_INTERRUPTIBLE state when the kthread is being stopped before the call of set_current_state(). Since kthread_exit() might sleep in exit_signals(), the warning is printed. Fix that by using schedule_timeout_interruptible() and removing the call of set_current_state(). This causes TASK_INTERRUPTIBLE to be set after kthread_should_stop() which might cause the kthread to exit.
Compile-tested only.
Reported-by: Zheyu Ma <zheyuma97@gmail.com> Fixes: 93cacfd41f82 (hwmon: (adt7470) Allow faster removal) Signed-off-by: Armin Wolf <W_Armin@gmx.de> --- drivers/hwmon/adt7470.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/hwmon/adt7470.c b/drivers/hwmon/adt7470.c index fb6d14d213a1..c67cd037a93f 100644 --- a/drivers/hwmon/adt7470.c +++ b/drivers/hwmon/adt7470.c @@ -19,6 +19,7 @@ #include <linux/log2.h> #include <linux/kthread.h> #include <linux/regmap.h> +#include <linux/sched.h> #include <linux/slab.h> #include <linux/util_macros.h>
@@ -294,11 +295,10 @@ static int adt7470_update_thread(void *p) adt7470_read_temperatures(data); mutex_unlock(&data->lock);
- set_current_state(TASK_INTERRUPTIBLE); if (kthread_should_stop()) break;
- schedule_timeout(msecs_to_jiffies(data->auto_update_interval)); + schedule_timeout_interruptible(msecs_to_jiffies(data->auto_update_interval)); }
return 0; -- 2.30.2
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