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authorMauro Carvalho Chehab <mchehab@redhat.com>2008-12-16 20:19:24 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2008-12-30 09:39:13 -0200
commit29b59417c514a2c5291abb4e3a42e5245ffe6058 (patch)
tree6f257bcbb964919de59ba2cbc483dc876025b771 /drivers
parent7831364f33af9bb7333f333e9a239b1dd2edea1c (diff)
V4L/DVB (9910): em28xx: move res_get locks to the caller routines
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/media/video/em28xx/em28xx-video.c36
1 files changed, 25 insertions, 11 deletions
diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c
index 90aedaeb09b..2d88afefecf 100644
--- a/drivers/media/video/em28xx/em28xx-video.c
+++ b/drivers/media/video/em28xx/em28xx-video.c
@@ -599,12 +599,10 @@ static int res_get(struct em28xx_fh *fh)
return rc;
if (dev->stream_on)
- return -EINVAL;
+ return -EBUSY;
- mutex_lock(&dev->lock);
dev->stream_on = 1;
fh->stream_on = 1;
- mutex_unlock(&dev->lock);
return rc;
}
@@ -1257,8 +1255,12 @@ static int vidioc_streamon(struct file *file, void *priv,
return rc;
- if (unlikely(res_get(fh) < 0))
- return -EBUSY;
+ mutex_lock(&dev->lock);
+ rc = res_get(fh);
+ mutex_unlock(&dev->lock);
+
+ if (unlikely(rc < 0))
+ return rc;
return (videobuf_streamon(&fh->vb_vidq));
}
@@ -1738,8 +1740,12 @@ em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
*/
if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
- if (unlikely(res_get(fh)))
- return -EBUSY;
+ mutex_lock(&dev->lock);
+ rc = res_get(fh);
+ mutex_unlock(&dev->lock);
+
+ if (unlikely(rc < 0))
+ return rc;
return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
filp->f_flags & O_NONBLOCK);
@@ -1761,7 +1767,11 @@ static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
if (rc < 0)
return rc;
- if (unlikely(res_get(fh) < 0))
+ mutex_lock(&dev->lock);
+ rc = res_get(fh);
+ mutex_unlock(&dev->lock);
+
+ if (unlikely(rc < 0))
return POLLERR;
if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
@@ -1779,13 +1789,17 @@ static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
struct em28xx *dev = fh->dev;
int rc;
- if (unlikely(res_get(fh) < 0))
- return -EBUSY;
-
rc = check_dev(dev);
if (rc < 0)
return rc;
+ mutex_lock(&dev->lock);
+ rc = res_get(fh);
+ mutex_unlock(&dev->lock);
+
+ if (unlikely(rc < 0))
+ return rc;
+
rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",