w1: fix WARNING after calling w1_process()
authorYang Yingliang <yangyingliang@huawei.com>
Mon, 5 Dec 2022 10:15:58 +0000 (18:15 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 19 Jan 2023 16:26:33 +0000 (17:26 +0100)
commit36225a7c72e9e3e1ce4001b6ce72849f5c9a2d3b
tree29ecce5ff35bd6023c7e794009eef5bb041169e7
parent25d5648802f12ae486076ceca5d7ddf1fef792b2
w1: fix WARNING after calling w1_process()

I got the following WARNING message while removing driver(ds2482):

------------[ cut here ]------------
do not call blocking ops when !TASK_RUNNING; state=1 set at [<000000002d50bfb6>] w1_process+0x9e/0x1d0 [wire]
WARNING: CPU: 0 PID: 262 at kernel/sched/core.c:9817 __might_sleep+0x98/0xa0
CPU: 0 PID: 262 Comm: w1_bus_master1 Tainted: G                 N 6.1.0-rc3+ #307
RIP: 0010:__might_sleep+0x98/0xa0
Call Trace:
 exit_signals+0x6c/0x550
 do_exit+0x2b4/0x17e0
 kthread_exit+0x52/0x60
 kthread+0x16d/0x1e0
 ret_from_fork+0x1f/0x30

The state of task is set to TASK_INTERRUPTIBLE in loop in w1_process(),
set it to TASK_RUNNING when it breaks out of the loop to avoid the
warning.

Fixes: 3c52e4e62789 ("W1: w1_process, block or sleep")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20221205101558.3599162-1-yangyingliang@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/w1/w1.c