From e37559b22c63b557d242bfa1a07ab1b8f7d5d9f1 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Thu, 17 Apr 2014 02:47:21 -0300 Subject: [media] vb2: stop_streaming should return void The vb2 core ignores any return code from the stop_streaming op. And there really isn't anything it can do anyway in case of an error. So change the return type to void and update any drivers that implement it. The int return gave drivers the idea that this operation could actually fail, but that's really not the case. The pwc amd sdr-msi3101 drivers both had this construction: if (mutex_lock_interruptible(&s->v4l2_lock)) return -ERESTARTSYS; This has been updated to just call mutex_lock(). The stop_streaming op expects this to really stop streaming and I very much doubt this will work reliably if stop_streaming just returns without really stopping the DMA. Signed-off-by: Hans Verkuil Acked-by: Pawel Osciak Acked-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab --- drivers/media/usb/usbtv/usbtv-video.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) (limited to 'drivers/media/usb/usbtv/usbtv-video.c') diff --git a/drivers/media/usb/usbtv/usbtv-video.c b/drivers/media/usb/usbtv/usbtv-video.c index 20365bd69d05..2967e808408b 100644 --- a/drivers/media/usb/usbtv/usbtv-video.c +++ b/drivers/media/usb/usbtv/usbtv-video.c @@ -634,15 +634,12 @@ static int usbtv_start_streaming(struct vb2_queue *vq, unsigned int count) return usbtv_start(usbtv); } -static int usbtv_stop_streaming(struct vb2_queue *vq) +static void usbtv_stop_streaming(struct vb2_queue *vq) { struct usbtv *usbtv = vb2_get_drv_priv(vq); - if (usbtv->udev == NULL) - return -ENODEV; - - usbtv_stop(usbtv); - return 0; + if (usbtv->udev) + usbtv_stop(usbtv); } static struct vb2_ops usbtv_vb2_ops = { -- cgit v1.2.3