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OpenCloudOS-Kernel
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[media] pwc: fix WARN_ON 

If start_streaming fails, then the buffers must be given back to vb2 with state
QUEUED, not ERROR. Otherwise a WARN_ON will be generated.

In the disconnect it is pointless to call pwc_cleanup_queued_bufs() as stop_streaming()
will be called anyway.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Tested-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Hans Verkuil 2014-08-04 07:29:59 -03:00 committed by Mauro Carvalho Chehab
parent a4bca4c7ad
commit 80b0963e16
1 changed files with 7 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/media/usb/pwc/pwc-if.c
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@ -508,7 +508,8 @@ static void pwc_isoc_cleanup(struct pwc_device *pdev)
}
/* Must be called with vb_queue_lock hold */
static void pwc_cleanup_queued_bufs(struct pwc_device *pdev)
static void pwc_cleanup_queued_bufs(struct pwc_device *pdev,
enum vb2_buffer_state state)
{
unsigned long flags = 0;
@ -519,7 +520,7 @@ static void pwc_cleanup_queued_bufs(struct pwc_device *pdev)
buf = list_entry(pdev->queued_bufs.next, struct pwc_frame_buf,
list);
list_del(&buf->list);
vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
vb2_buffer_done(&buf->vb, state);
}
spin_unlock_irqrestore(&pdev->queued_bufs_lock, flags);
}
@ -674,7 +675,7 @@ static int start_streaming(struct vb2_queue *vq, unsigned int count)
pwc_set_leds(pdev, 0, 0);
pwc_camera_power(pdev, 0);
/* And cleanup any queued bufs!! */
pwc_cleanup_queued_bufs(pdev);
pwc_cleanup_queued_bufs(pdev, VB2_BUF_STATE_QUEUED);
}
mutex_unlock(&pdev->v4l2_lock);
@ -692,7 +693,9 @@ static void stop_streaming(struct vb2_queue *vq)
pwc_isoc_cleanup(pdev);
}
pwc_cleanup_queued_bufs(pdev);
pwc_cleanup_queued_bufs(pdev, VB2_BUF_STATE_ERROR);
if (pdev->fill_buf)
vb2_buffer_done(&pdev->fill_buf->vb, VB2_BUF_STATE_ERROR);
mutex_unlock(&pdev->v4l2_lock);
}
@ -1125,7 +1128,6 @@ static void usb_pwc_disconnect(struct usb_interface *intf)
if (pdev->vb_queue.streaming)
pwc_isoc_cleanup(pdev);
pdev->udev = NULL;
pwc_cleanup_queued_bufs(pdev);
v4l2_device_disconnect(&pdev->v4l2_dev);
video_unregister_device(&pdev->vdev);