Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-17 08:31:39 +00:00
Code Issues Packages Projects Releases Wiki Activity

rtl8188eu: Fix a possible sleep-in-atomic bug in _rtw_pwr_wakeup

Browse Source 
The driver may sleep under a spinlock, and the function call path is:
rtw_set_802_11_disassociate(acquire the spinlock)
  _rtw_pwr_wakeup
    usleep_range --> may sleep

To fix it, usleep_range is replaced with udelay.
This bug is found by my static analysis tool and my code review.

Signed-off-by: Jia-Ju Bai <baijiaju1990@163.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jia-Ju Bai 2017-10-08 19:54:53 +08:00 committed by Greg Kroah-Hartman
parent 2bf9806d42
commit f3691e0042
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/staging/rtl8188eu/core/rtw_pwrctrl.c
View File

@ -570,7 +570,7 @@ int _rtw_pwr_wakeup(struct adapter *padapter, u32 ips_deffer_ms, const char *cal
DBG_88E("%s wait ps_processing...\n", __func__);
while (pwrpriv->ps_processing &&
jiffies_to_msecs(jiffies - start) <= 3000)
usleep_range(1000, 3000);
udelay(1500);
if (pwrpriv->ps_processing)
DBG_88E("%s wait ps_processing timeout\n", __func__);
else