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path: root/drivers/media/usb/uvc/uvc_v4l2.c
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Diffstat (limited to 'drivers/media/usb/uvc/uvc_v4l2.c')
-rw-r--r--drivers/media/usb/uvc/uvc_v4l2.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
index bf9d07393139..d6aa402954a5 100644
--- a/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -576,6 +576,19 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
break;
}
+ /* Priority */
+ case VIDIOC_G_PRIORITY:
+ *(u32 *)arg = v4l2_prio_max(vdev->prio);
+ break;
+
+ case VIDIOC_S_PRIORITY:
+ ret = v4l2_prio_check(vdev->prio, handle->vfh.prio);
+ if (ret < 0)
+ return ret;
+
+ return v4l2_prio_change(vdev->prio, &handle->vfh.prio,
+ *(u32 *)arg);
+
/* Get, Set & Query control */
case VIDIOC_QUERYCTRL:
return uvc_query_v4l2_ctrl(chain, arg);
@@ -606,6 +619,10 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
struct v4l2_control *ctrl = arg;
struct v4l2_ext_control xctrl;
+ ret = v4l2_prio_check(vdev->prio, handle->vfh.prio);
+ if (ret < 0)
+ return ret;
+
memset(&xctrl, 0, sizeof xctrl);
xctrl.id = ctrl->id;
xctrl.value = ctrl->value;
@@ -653,6 +670,10 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
}
case VIDIOC_S_EXT_CTRLS:
+ ret = v4l2_prio_check(vdev->prio, handle->vfh.prio);
+ if (ret < 0)
+ return ret;
+
case VIDIOC_TRY_EXT_CTRLS:
{
struct v4l2_ext_controls *ctrls = arg;
@@ -747,6 +768,10 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
{
u32 input = *(u32 *)arg + 1;
+ ret = v4l2_prio_check(vdev->prio, handle->vfh.prio);
+ if (ret < 0)
+ return ret;
+
if ((ret = uvc_acquire_privileges(handle)) < 0)
return ret;
@@ -800,6 +825,10 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
}
case VIDIOC_S_FMT:
+ ret = v4l2_prio_check(vdev->prio, handle->vfh.prio);
+ if (ret < 0)
+ return ret;
+
if ((ret = uvc_acquire_privileges(handle)) < 0)
return ret;
@@ -902,6 +931,10 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
return uvc_v4l2_get_streamparm(stream, arg);
case VIDIOC_S_PARM:
+ ret = v4l2_prio_check(vdev->prio, handle->vfh.prio);
+ if (ret < 0)
+ return ret;
+
if ((ret = uvc_acquire_privileges(handle)) < 0)
return ret;
@@ -936,6 +969,10 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
/* Buffers & streaming */
case VIDIOC_REQBUFS:
+ ret = v4l2_prio_check(vdev->prio, handle->vfh.prio);
+ if (ret < 0)
+ return ret;
+
if ((ret = uvc_acquire_privileges(handle)) < 0)
return ret;
@@ -981,6 +1018,10 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
if (*type != stream->type)
return -EINVAL;
+ ret = v4l2_prio_check(vdev->prio, handle->vfh.prio);
+ if (ret < 0)
+ return ret;
+
if (!uvc_has_privileges(handle))
return -EBUSY;
@@ -999,6 +1040,10 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg)
if (*type != stream->type)
return -EINVAL;
+ ret = v4l2_prio_check(vdev->prio, handle->vfh.prio);
+ if (ret < 0)
+ return ret;
+
if (!uvc_has_privileges(handle))
return -EBUSY;

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