diff options
| author | Hans Verkuil <hans.verkuil@cisco.com> | 2014-03-04 14:28:11 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <m.chehab@samsung.com> | 2014-03-11 13:56:38 +0400 |
| commit | 1a17948184a3320e0bb0aab561112211d2e9b7a8 (patch) | |
| tree | a25e6526939a67a4bde8017a1b2db76981fd17be /drivers/media/usb/pwc | |
| parent | 0647064293d745720fc62e2edc7734fa8af06adf (diff) | |
| download | linux-1a17948184a3320e0bb0aab561112211d2e9b7a8.tar.xz | |
[media] pwc: do not decompress the image unless the state is DONE
There is no point in trying to decompress a captured frame unless
the buffer state is OK. It won't be used in any other state, and
in fact the contents of the buffer might well be corrupt.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Diffstat (limited to 'drivers/media/usb/pwc')
| -rw-r--r-- | drivers/media/usb/pwc/pwc-if.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/media/usb/pwc/pwc-if.c b/drivers/media/usb/pwc/pwc-if.c index 1a27096b3f91..84a6720b1d00 100644 --- a/drivers/media/usb/pwc/pwc-if.c +++ b/drivers/media/usb/pwc/pwc-if.c @@ -619,12 +619,15 @@ static void buffer_finish(struct vb2_buffer *vb) struct pwc_device *pdev = vb2_get_drv_priv(vb->vb2_queue); struct pwc_frame_buf *buf = container_of(vb, struct pwc_frame_buf, vb); - /* - * Application has called dqbuf and is getting back a buffer we've - * filled, take the pwc data we've stored in buf->data and decompress - * it into a usable format, storing the result in the vb2_buffer - */ - pwc_decompress(pdev, buf); + if (vb->state == VB2_BUF_STATE_DONE) { + /* + * Application has called dqbuf and is getting back a buffer + * we've filled, take the pwc data we've stored in buf->data + * and decompress it into a usable format, storing the result + * in the vb2_buffer. + */ + pwc_decompress(pdev, buf); + } } static void buffer_cleanup(struct vb2_buffer *vb) |