We weren't checking whether the resource was in use before calling res_free(),
so applications which called STREAMOFF on a v4l2 device that wasn't already
streaming would cause a BUG() to be hit (MythTV).
Reported-by: Larry Finger <larry.finger@xxxxxxxxxxxx>
Reported-by: Jay Harbeston <jharbestonus@xxxxxxxxx>
Signed-off-by: Devin Heitmueller <dheitmueller@xxxxxxxxxxxxxx>
---
drivers/media/video/au0828/au0828-video.c | 12 ++++++++----
1 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/media/video/au0828/au0828-video.c b/drivers/media/video/au0828/au0828-video.c
index df92322..4d5b670 100644
--- a/drivers/media/video/au0828/au0828-video.c
+++ b/drivers/media/video/au0828/au0828-video.c
@@ -1702,14 +1702,18 @@ static int vidioc_streamoff(struct file *file, void *priv,
(AUVI_INPUT(i).audio_setup)(dev, 0);
}
- videobuf_streamoff(&fh->vb_vidq);
- res_free(fh, AU0828_RESOURCE_VIDEO);
+ if (res_check(fh, AU0828_RESOURCE_VIDEO)) {
+ videobuf_streamoff(&fh->vb_vidq);
+ res_free(fh, AU0828_RESOURCE_VIDEO);
+ }
} else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
dev->vbi_timeout_running = 0;
del_timer_sync(&dev->vbi_timeout);
- videobuf_streamoff(&fh->vb_vbiq);
- res_free(fh, AU0828_RESOURCE_VBI);
+ if (res_check(fh, AU0828_RESOURCE_VBI)) {
+ videobuf_streamoff(&fh->vb_vbiq);
+ res_free(fh, AU0828_RESOURCE_VBI);
+ }
}
return 0;
--
1.7.1
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