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authorRicardo Ribalda <ricardo.ribalda@gmail.com>2013-11-06 12:39:35 +0400
committerMauro Carvalho Chehab <m.chehab@samsung.com>2013-12-09 20:50:51 +0400
commitbdee6bdb67e84aaf26a163aced908f4ab6bbd06b (patch)
tree26093dfeeaa09369d2d6581b861bde6dfab0524c /drivers/media
parent20e5d580195cd4200b0f92d8007784b28c61b235 (diff)
downloadlinux-bdee6bdb67e84aaf26a163aced908f4ab6bbd06b.tar.xz
[media] em28xx-video: Swap release order to avoid lock nesting
vb2_fop_release might take the video queue mutex lock. In order to avoid nesting mutexes the private mutex is taken after the fop_release has finished. Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/usb/em28xx/em28xx-video.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/media/usb/em28xx/em28xx-video.c b/drivers/media/usb/em28xx/em28xx-video.c
index fc5d60efd4ab..dd19c9ff76e0 100644
--- a/drivers/media/usb/em28xx/em28xx-video.c
+++ b/drivers/media/usb/em28xx/em28xx-video.c
@@ -1664,8 +1664,8 @@ static int em28xx_v4l2_close(struct file *filp)
em28xx_videodbg("users=%d\n", dev->users);
- mutex_lock(&dev->lock);
vb2_fop_release(filp);
+ mutex_lock(&dev->lock);
if (dev->users == 1) {
/* the device is already disconnect,