diff options
| author | Jia-Ju Bai <baijiaju1990@163.com> | 2017-06-01 16:18:10 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-13 19:50:16 +0200 |
| commit | 819bb2c00f329088a5f9291f48aeda740b3dcec9 (patch) | |
| tree | 4d2b992e9cb851f8907f37eeae13bf105cc5174d /drivers/gpu/drm/omapdrm/omap_gem.c | |
| parent | 615855388d8597e8522a5e5f972da704e470f63a (diff) | |
qlcnic: Fix a sleep-in-atomic bug in qlcnic_82xx_hw_write_wx_2M and qlcnic_82xx_hw_read_wx_2M
[ Upstream commit 5ea6d691aac6c93b790f0905e3460d44cc4c449b ]
The driver may sleep under a write spin lock, and the function
call path is:
qlcnic_82xx_hw_write_wx_2M (acquire the lock by write_lock_irqsave)
crb_win_lock
qlcnic_pcie_sem_lock
usleep_range
qlcnic_82xx_hw_read_wx_2M (acquire the lock by write_lock_irqsave)
crb_win_lock
qlcnic_pcie_sem_lock
usleep_range
To fix it, the usleep_range is replaced with udelay.
Signed-off-by: Jia-Ju Bai <baijiaju1990@163.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm/omapdrm/omap_gem.c')
0 files changed, 0 insertions, 0 deletions