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| author | Armin Wolf <W_Armin@gmx.de> | 2022-04-07 12:13:12 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-05-12 12:14:57 +0200 |
| commit | 36014b3b7a6931d62a0213fcd0db0811e6133095 (patch) | |
| tree | 99c4907fcbc025d7c6074ab25806aa0727d83716 /drivers | |
| parent | a93ea9595fde438996d7b9322749d4d1921162f7 (diff) | |
| download | linux-36014b3b7a6931d62a0213fcd0db0811e6133095.tar.gz linux-36014b3b7a6931d62a0213fcd0db0811e6133095.tar.bz2 linux-36014b3b7a6931d62a0213fcd0db0811e6133095.zip | |
hwmon: (adt7470) Fix warning on module removal
commit 7b2666ce445c700b8dcee994da44ddcf050a0842 upstream.
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.
Reported-by: Zheyu Ma <zheyuma97@gmail.com>
Fixes: 93cacfd41f82 (hwmon: (adt7470) Allow faster removal)
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Tested-by: Zheyu Ma <zheyuma97@gmail.com>
Link: https://lore.kernel.org/r/20220407101312.13331-1-W_Armin@gmx.de
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hwmon/adt7470.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/hwmon/adt7470.c b/drivers/hwmon/adt7470.c index 6e60ca53406e..474f226e0891 100644 --- a/drivers/hwmon/adt7470.c +++ b/drivers/hwmon/adt7470.c @@ -33,6 +33,7 @@ #include <linux/kthread.h> #include <linux/slab.h> #include <linux/util_macros.h> +#include <linux/sched.h> /* Addresses to scan */ static const unsigned short normal_i2c[] = { 0x2C, 0x2E, 0x2F, I2C_CLIENT_END }; @@ -273,11 +274,10 @@ static int adt7470_update_thread(void *p) adt7470_read_temperatures(client, 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; |