1 files changed, 8 insertions, 6 deletions

diff --git a/drivers/media/video/bt8xx/bttv-driver.c b/drivers/media/video/bt8xx/bttv-driver.c
index 23b7499b3185..5eb1464af670 100644
--- a/drivers/media/video/bt8xx/bttv-driver.c
+++ b/drivers/media/video/bt8xx/bttv-driver.c
@@ -3152,6 +3152,7 @@ static unsigned int bttv_poll(struct file *file, poll_table *wait)
         struct bttv_fh *fh = file->private_data;
         struct bttv_buffer *buf;
         enum v4l2_field field;
+        unsigned int rc = POLLERR;
 
         if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) {
                 if (!check_alloc_btres(fh->btv,fh,RESOURCE_VBI))
@@ -3160,9 +3161,10 @@ static unsigned int bttv_poll(struct file *file, poll_table *wait)
         }
 
         if (check_btres(fh,RESOURCE_VIDEO_STREAM)) {
+                mutex_lock(&fh->cap.vb_lock);
                 /* streaming capture */
                 if (list_empty(&fh->cap.stream))
-                        return POLLERR;
+                        goto err;
                 buf = list_entry(fh->cap.stream.next,struct bttv_buffer,vb.stream);
         } else {
                 /* read() capture */
@@ -3191,11 +3193,12 @@ static unsigned int bttv_poll(struct file *file, poll_table *wait)
         poll_wait(file, &buf->vb.done, wait);
         if (buf->vb.state == VIDEOBUF_DONE ||
             buf->vb.state == VIDEOBUF_ERROR)
-                return POLLIN|POLLRDNORM;
-        return 0;
+                rc =  POLLIN|POLLRDNORM;
+        else
+                rc = 0;
 err:
         mutex_unlock(&fh->cap.vb_lock);
-        return POLLERR;
+        return rc;
 }
 
 static int bttv_open(struct file *file)
@@ -4166,7 +4169,6 @@ static struct video_device *vdev_init(struct bttv *btv,
         if (NULL == vfd)
                 return NULL;
         *vfd = *template;
-        vfd->minor   = -1;
         vfd->v4l2_dev = &btv->c.v4l2_dev;
         vfd->release = video_device_release;
         vfd->debug   = bttv_debug;
@@ -4629,7 +4631,7 @@ static int __init bttv_init_module(void)
 #endif
         if (gbuffers < 2 || gbuffers > VIDEO_MAX_FRAME)
                 gbuffers = 2;
-        if (gbufsize < 0 || gbufsize > BTTV_MAX_FBUF)
+        if (gbufsize > BTTV_MAX_FBUF)
                 gbufsize = BTTV_MAX_FBUF;
         gbufsize = (gbufsize + PAGE_SIZE - 1) & PAGE_MASK;
         if (bttv_verbose)