V4L/DVB (6944a): Fix Regression VIDIOCGMBUF ioctl hangs on bttv driver
Fix bttv VIDIOCGMBUF locking like done in commit
820eacd84cff23b76693f4be1e28feb672f4488f.
Signed-off-by: Gregor Jasny <gjasny@web.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/bt8xx/bttv-driver.c b/drivers/media/video/bt8xx/bttv-driver.c
index c02d92d..581a3c9 100644
--- a/drivers/media/video/bt8xx/bttv-driver.c
+++ b/drivers/media/video/bt8xx/bttv-driver.c
@@ -3063,11 +3063,10 @@
struct video_mbuf *mbuf = arg;
unsigned int i;
- mutex_lock(&fh->cap.lock);
retval = videobuf_mmap_setup(&fh->cap,gbuffers,gbufsize,
V4L2_MEMORY_MMAP);
if (retval < 0)
- goto fh_unlock_and_return;
+ return retval;
gbuffers = retval;
memset(mbuf,0,sizeof(*mbuf));
@@ -3075,7 +3074,6 @@
mbuf->size = gbuffers * gbufsize;
for (i = 0; i < gbuffers; i++)
mbuf->offsets[i] = i * gbufsize;
- mutex_unlock(&fh->cap.lock);
return 0;
}
case VIDIOCMCAPTURE: