This is a note to let you know that I've just added the patch titled
drivers: staging: r8188eu: Fix sleep-in-atomic-context bug in rtw_join_timeout_handler
to the 6.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drivers-staging-r8188eu-fix-sleep-in-atomic-context-.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f2c2f0484f0a1d3634f54860fac91bd8f6986f25
Author: Duoming Zhou <duoming@xxxxxxxxxx>
Date: Tue Oct 18 16:34:24 2022 +0800
drivers: staging: r8188eu: Fix sleep-in-atomic-context bug in rtw_join_timeout_handler
[ Upstream commit ce8cc75c7419ad54cb99437543a54c97c7446db5 ]
The rtw_join_timeout_handler() is a timer handler that
runs in atomic context, but it could call msleep().
As a result, the sleep-in-atomic-context bug will happen.
The process is shown below:
(atomic context)
rtw_join_timeout_handler
_rtw_join_timeout_handler
rtw_do_join
rtw_select_and_join_from_scanned_queue
rtw_indicate_disconnect
rtw_lps_ctrl_wk_cmd
lps_ctrl_wk_hdl
LPS_Leave
LPS_RF_ON_check
msleep //sleep in atomic context
Fix by removing msleep() and replacing with mdelay().
Fixes: 15865124feed ("staging: r8188eu: introduce new core dir for RTL8188eu driver")
Signed-off-by: Duoming Zhou <duoming@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20221018083424.79741-1-duoming@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/staging/r8188eu/core/rtw_pwrctrl.c b/drivers/staging/r8188eu/core/rtw_pwrctrl.c
index 10550bd2c16d..abfd14bfd5fb 100644
--- a/drivers/staging/r8188eu/core/rtw_pwrctrl.c
+++ b/drivers/staging/r8188eu/core/rtw_pwrctrl.c
@@ -273,7 +273,7 @@ static s32 LPS_RF_ON_check(struct adapter *padapter, u32 delay_ms)
err = -1;
break;
}
- msleep(1);
+ mdelay(1);
}
return err;
