From: Duoming Zhou duoming@zju.edu.cn
[ 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@zju.edu.cn Link: https://lore.kernel.org/r/20221018083424.79741-1-duoming@zju.edu.cn Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/staging/r8188eu/core/rtw_pwrctrl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
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;