diff options
| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2009-09-02 03:12:26 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-12-05 18:40:35 -0200 |
| commit | 1a969d9863a0c8890eb799ec710dda9701f10483 (patch) | |
| tree | 84174637b4f3e57fe5d417e2500b269b581f44ef /drivers/media/video/uvc | |
| parent | 4e7387858f35eace117493e4ad69d3b7ccc84a41 (diff) | |
V4L/DVB (13151): uvcvideo: Dismiss privileges when freeing video buffers
Dismiss privileges on the file handle when calling VIDIOC_REQBUFS with a
buffer count of 0. This allows applications to release the streaming
permissions on the file handle without closing it.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/uvc')
| -rw-r--r-- | drivers/media/video/uvc/uvc_v4l2.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c index 7c555712411a..94c1d6696af5 100644 --- a/drivers/media/video/uvc/uvc_v4l2.c +++ b/drivers/media/video/uvc/uvc_v4l2.c @@ -364,7 +364,8 @@ static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream, * unprivileged state. Only a single instance can be in a privileged state at * a given time. Trying to perform an operation that requires privileges will * automatically acquire the required privileges if possible, or return -EBUSY - * otherwise. Privileges are dismissed when closing the instance. + * otherwise. Privileges are dismissed when closing the instance or when + * freeing the video buffers using VIDIOC_REQBUFS. * * Operations that require privileges are: * @@ -884,6 +885,9 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) if (ret < 0) return ret; + if (ret == 0) + uvc_dismiss_privileges(handle); + rb->count = ret; ret = 0; break; |