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authorHans Verkuil <hverkuil@xs4all.nl>2014-08-04 14:29:59 +0400
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-01-29 23:27:03 +0300
commit80b0963e1698e10a58451f0508058fc20e48334a (patch)
treeb925dc546153cbdf086b6c67b467591770fa01d8 /drivers/media/usb/pwc
parenta4bca4c7ad36a4cdafc87d1dce3758cdccef1ca7 (diff)
downloadlinux-80b0963e1698e10a58451f0508058fc20e48334a.tar.xz
[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>
Diffstat (limited to 'drivers/media/usb/pwc')
-rw-r--r--drivers/media/usb/pwc/pwc-if.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/media/usb/pwc/pwc-if.c b/drivers/media/usb/pwc/pwc-if.c
index 15b754da4a2c..702267e208ba 100644
--- a/drivers/media/usb/pwc/pwc-if.c
+++ b/drivers/media/usb/pwc/pwc-if.c
@@ -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);