On Tue, Mar 11, 2014 at 6:20 AM, Hans Verkuil <hverkuil@xxxxxxxxx> wrote:
> From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
>
> 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 <hans.verkuil@xxxxxxxxx>
Acked-by: Pawel Osciak <pawel@xxxxxxxxxx>
> ---
> drivers/media/pci/sta2x11/sta2x11_vip.c | 3 +--
> drivers/media/platform/blackfin/bfin_capture.c | 6 +-----
> drivers/media/platform/coda.c | 4 +---
> drivers/media/platform/exynos-gsc/gsc-m2m.c | 4 +---
> drivers/media/platform/exynos4-is/fimc-capture.c | 6 +++---
> drivers/media/platform/exynos4-is/fimc-lite.c | 6 +++---
> drivers/media/platform/exynos4-is/fimc-m2m.c | 3 +--
> drivers/media/platform/marvell-ccic/mcam-core.c | 7 +++----
> drivers/media/platform/s3c-camif/camif-capture.c | 4 ++--
> drivers/media/platform/s5p-jpeg/jpeg-core.c | 4 +---
> drivers/media/platform/s5p-mfc/s5p_mfc_dec.c | 3 +--
> drivers/media/platform/s5p-mfc/s5p_mfc_enc.c | 3 +--
> drivers/media/platform/s5p-tv/mixer_video.c | 3 +--
> drivers/media/platform/soc_camera/atmel-isi.c | 6 ++----
> drivers/media/platform/soc_camera/mx2_camera.c | 4 +---
> drivers/media/platform/soc_camera/mx3_camera.c | 4 +---
> drivers/media/platform/soc_camera/rcar_vin.c | 4 +---
> drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c | 4 ++--
> drivers/media/platform/vivi.c | 3 +--
> drivers/media/platform/vsp1/vsp1_video.c | 4 +---
> drivers/media/usb/em28xx/em28xx-v4l.h | 2 +-
> drivers/media/usb/em28xx/em28xx-video.c | 8 ++------
> drivers/media/usb/pwc/pwc-if.c | 7 ++-----
> drivers/media/usb/s2255/s2255drv.c | 5 ++---
> drivers/media/usb/stk1160/stk1160-v4l.c | 4 ++--
> drivers/media/usb/usbtv/usbtv-video.c | 9 +++------
> drivers/staging/media/davinci_vpfe/vpfe_video.c | 3 +--
> drivers/staging/media/dt3155v4l/dt3155v4l.c | 3 +--
> drivers/staging/media/go7007/go7007-v4l2.c | 3 +--
> drivers/staging/media/msi3101/sdr-msi3101.c | 7 ++-----
> drivers/staging/media/solo6x10/solo6x10-v4l2-enc.c | 3 +--
> drivers/staging/media/solo6x10/solo6x10-v4l2.c | 3 +--
> include/media/videobuf2-core.h | 2 +-
> 33 files changed, 49 insertions(+), 95 deletions(-)
>
> diff --git a/drivers/media/pci/sta2x11/sta2x11_vip.c b/drivers/media/pci/sta2x11/sta2x11_vip.c
> index bb11443..7559951 100644
> --- a/drivers/media/pci/sta2x11/sta2x11_vip.c
> +++ b/drivers/media/pci/sta2x11/sta2x11_vip.c
> @@ -357,7 +357,7 @@ static int start_streaming(struct vb2_queue *vq, unsigned int count)
> }
>
> /* abort streaming and wait for last buffer */
> -static int stop_streaming(struct vb2_queue *vq)
> +static void stop_streaming(struct vb2_queue *vq)
> {
> struct sta2x11_vip *vip = vb2_get_drv_priv(vq);
> struct vip_buffer *vip_buf, *node;
> @@ -374,7 +374,6 @@ static int stop_streaming(struct vb2_queue *vq)
> list_del(&vip_buf->list);
> }
> spin_unlock(&vip->lock);
> - return 0;
> }
>
> static struct vb2_ops vip_video_qops = {
> diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c
> index 200bec9..16f643c 100644
> --- a/drivers/media/platform/blackfin/bfin_capture.c
> +++ b/drivers/media/platform/blackfin/bfin_capture.c
> @@ -427,15 +427,12 @@ static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
> return 0;
> }
>
> -static int bcap_stop_streaming(struct vb2_queue *vq)
> +static void bcap_stop_streaming(struct vb2_queue *vq)
> {
> struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
> struct ppi_if *ppi = bcap_dev->ppi;
> int ret;
>
> - if (!vb2_is_streaming(vq))
> - return 0;
> -
> bcap_dev->stop = true;
> wait_for_completion(&bcap_dev->comp);
> ppi->ops->stop(ppi);
> @@ -452,7 +449,6 @@ static int bcap_stop_streaming(struct vb2_queue *vq)
> list_del(&bcap_dev->cur_frm->list);
> vb2_buffer_done(&bcap_dev->cur_frm->vb, VB2_BUF_STATE_ERROR);
> }
> - return 0;
> }
>
> static struct vb2_ops bcap_video_qops = {
> diff --git a/drivers/media/platform/coda.c b/drivers/media/platform/coda.c
> index 3e5199e..d9b1a04 100644
> --- a/drivers/media/platform/coda.c
> +++ b/drivers/media/platform/coda.c
> @@ -2269,7 +2269,7 @@ out:
> return ret;
> }
>
> -static int coda_stop_streaming(struct vb2_queue *q)
> +static void coda_stop_streaming(struct vb2_queue *q)
> {
> struct coda_ctx *ctx = vb2_get_drv_priv(q);
> struct coda_dev *dev = ctx->dev;
> @@ -2295,8 +2295,6 @@ static int coda_stop_streaming(struct vb2_queue *q)
> ctx->bitstream.vaddr, ctx->bitstream.size);
> ctx->runcounter = 0;
> }
> -
> - return 0;
> }
>
> static struct vb2_ops coda_qops = {
> diff --git a/drivers/media/platform/exynos-gsc/gsc-m2m.c b/drivers/media/platform/exynos-gsc/gsc-m2m.c
> index d0ea94f..e434f1f0 100644
> --- a/drivers/media/platform/exynos-gsc/gsc-m2m.c
> +++ b/drivers/media/platform/exynos-gsc/gsc-m2m.c
> @@ -66,15 +66,13 @@ static int gsc_m2m_start_streaming(struct vb2_queue *q, unsigned int count)
> return ret > 0 ? 0 : ret;
> }
>
> -static int gsc_m2m_stop_streaming(struct vb2_queue *q)
> +static void gsc_m2m_stop_streaming(struct vb2_queue *q)
> {
> struct gsc_ctx *ctx = q->drv_priv;
>
> __gsc_m2m_job_abort(ctx);
>
> pm_runtime_put(&ctx->gsc_dev->pdev->dev);
> -
> - return 0;
> }
>
> void gsc_m2m_job_finish(struct gsc_ctx *ctx, int vb_state)
> diff --git a/drivers/media/platform/exynos4-is/fimc-capture.c b/drivers/media/platform/exynos4-is/fimc-capture.c
> index 92ae812..3d2babd 100644
> --- a/drivers/media/platform/exynos4-is/fimc-capture.c
> +++ b/drivers/media/platform/exynos4-is/fimc-capture.c
> @@ -294,15 +294,15 @@ static int start_streaming(struct vb2_queue *q, unsigned int count)
> return 0;
> }
>
> -static int stop_streaming(struct vb2_queue *q)
> +static void stop_streaming(struct vb2_queue *q)
> {
> struct fimc_ctx *ctx = q->drv_priv;
> struct fimc_dev *fimc = ctx->fimc_dev;
>
> if (!fimc_capture_active(fimc))
> - return -EINVAL;
> + return;
>
> - return fimc_stop_capture(fimc, false);
> + fimc_stop_capture(fimc, false);
> }
>
> int fimc_capture_suspend(struct fimc_dev *fimc)
> diff --git a/drivers/media/platform/exynos4-is/fimc-lite.c b/drivers/media/platform/exynos4-is/fimc-lite.c
> index 3ad660b..630aef5 100644
> --- a/drivers/media/platform/exynos4-is/fimc-lite.c
> +++ b/drivers/media/platform/exynos4-is/fimc-lite.c
> @@ -350,14 +350,14 @@ static int start_streaming(struct vb2_queue *q, unsigned int count)
> return 0;
> }
>
> -static int stop_streaming(struct vb2_queue *q)
> +static void stop_streaming(struct vb2_queue *q)
> {
> struct fimc_lite *fimc = q->drv_priv;
>
> if (!fimc_lite_active(fimc))
> - return -EINVAL;
> + return;
>
> - return fimc_lite_stop_capture(fimc, false);
> + fimc_lite_stop_capture(fimc, false);
> }
>
> static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *pfmt,
> diff --git a/drivers/media/platform/exynos4-is/fimc-m2m.c b/drivers/media/platform/exynos4-is/fimc-m2m.c
> index 36971d9..d314155 100644
> --- a/drivers/media/platform/exynos4-is/fimc-m2m.c
> +++ b/drivers/media/platform/exynos4-is/fimc-m2m.c
> @@ -85,7 +85,7 @@ static int start_streaming(struct vb2_queue *q, unsigned int count)
> return ret > 0 ? 0 : ret;
> }
>
> -static int stop_streaming(struct vb2_queue *q)
> +static void stop_streaming(struct vb2_queue *q)
> {
> struct fimc_ctx *ctx = q->drv_priv;
> int ret;
> @@ -95,7 +95,6 @@ static int stop_streaming(struct vb2_queue *q)
> fimc_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR);
>
> pm_runtime_put(&ctx->fimc_dev->pdev->dev);
> - return 0;
> }
>
> static void fimc_device_run(void *priv)
> diff --git a/drivers/media/platform/marvell-ccic/mcam-core.c b/drivers/media/platform/marvell-ccic/mcam-core.c
> index 8b34c48..be4b512 100644
> --- a/drivers/media/platform/marvell-ccic/mcam-core.c
> +++ b/drivers/media/platform/marvell-ccic/mcam-core.c
> @@ -1156,7 +1156,7 @@ static int mcam_vb_start_streaming(struct vb2_queue *vq, unsigned int count)
> return mcam_read_setup(cam);
> }
>
> -static int mcam_vb_stop_streaming(struct vb2_queue *vq)
> +static void mcam_vb_stop_streaming(struct vb2_queue *vq)
> {
> struct mcam_camera *cam = vb2_get_drv_priv(vq);
> unsigned long flags;
> @@ -1164,10 +1164,10 @@ static int mcam_vb_stop_streaming(struct vb2_queue *vq)
> if (cam->state == S_BUFWAIT) {
> /* They never gave us buffers */
> cam->state = S_IDLE;
> - return 0;
> + return;
> }
> if (cam->state != S_STREAMING)
> - return -EINVAL;
> + return;
> mcam_ctlr_stop_dma(cam);
> /*
> * Reset the CCIC PHY after stopping streaming,
> @@ -1182,7 +1182,6 @@ static int mcam_vb_stop_streaming(struct vb2_queue *vq)
> spin_lock_irqsave(&cam->dev_lock, flags);
> INIT_LIST_HEAD(&cam->buffers);
> spin_unlock_irqrestore(&cam->dev_lock, flags);
> - return 0;
> }
>
>
> diff --git a/drivers/media/platform/s3c-camif/camif-capture.c b/drivers/media/platform/s3c-camif/camif-capture.c
> index 4e4d163..deba425 100644
> --- a/drivers/media/platform/s3c-camif/camif-capture.c
> +++ b/drivers/media/platform/s3c-camif/camif-capture.c
> @@ -435,10 +435,10 @@ static int start_streaming(struct vb2_queue *vq, unsigned int count)
> return 0;
> }
>
> -static int stop_streaming(struct vb2_queue *vq)
> +static void stop_streaming(struct vb2_queue *vq)
> {
> struct camif_vp *vp = vb2_get_drv_priv(vq);
> - return camif_stop_capture(vp);
> + camif_stop_capture(vp);
> }
>
> static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *pfmt,
> diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c
> index 8a18972..368b3f6 100644
> --- a/drivers/media/platform/s5p-jpeg/jpeg-core.c
> +++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c
> @@ -1670,13 +1670,11 @@ static int s5p_jpeg_start_streaming(struct vb2_queue *q, unsigned int count)
> return ret > 0 ? 0 : ret;
> }
>
> -static int s5p_jpeg_stop_streaming(struct vb2_queue *q)
> +static void s5p_jpeg_stop_streaming(struct vb2_queue *q)
> {
> struct s5p_jpeg_ctx *ctx = vb2_get_drv_priv(q);
>
> pm_runtime_put(ctx->jpeg->dev);
> -
> - return 0;
> }
>
> static struct vb2_ops s5p_jpeg_qops = {
> diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
> index 8faf969..58b7bba 100644
> --- a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
> +++ b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
> @@ -1027,7 +1027,7 @@ static int s5p_mfc_start_streaming(struct vb2_queue *q, unsigned int count)
> return 0;
> }
>
> -static int s5p_mfc_stop_streaming(struct vb2_queue *q)
> +static void s5p_mfc_stop_streaming(struct vb2_queue *q)
> {
> unsigned long flags;
> struct s5p_mfc_ctx *ctx = fh_to_ctx(q->drv_priv);
> @@ -1071,7 +1071,6 @@ static int s5p_mfc_stop_streaming(struct vb2_queue *q)
> }
> if (aborted)
> ctx->state = MFCINST_RUNNING;
> - return 0;
> }
>
>
> diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c b/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
> index df83cd1..458279e 100644
> --- a/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
> +++ b/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
> @@ -1954,7 +1954,7 @@ static int s5p_mfc_start_streaming(struct vb2_queue *q, unsigned int count)
> return 0;
> }
>
> -static int s5p_mfc_stop_streaming(struct vb2_queue *q)
> +static void s5p_mfc_stop_streaming(struct vb2_queue *q)
> {
> unsigned long flags;
> struct s5p_mfc_ctx *ctx = fh_to_ctx(q->drv_priv);
> @@ -1983,7 +1983,6 @@ static int s5p_mfc_stop_streaming(struct vb2_queue *q)
> ctx->src_queue_cnt = 0;
> }
> spin_unlock_irqrestore(&dev->irqlock, flags);
> - return 0;
> }
>
> static void s5p_mfc_buf_queue(struct vb2_buffer *vb)
> diff --git a/drivers/media/platform/s5p-tv/mixer_video.c b/drivers/media/platform/s5p-tv/mixer_video.c
> index a1ce55f..9f1e52f 100644
> --- a/drivers/media/platform/s5p-tv/mixer_video.c
> +++ b/drivers/media/platform/s5p-tv/mixer_video.c
> @@ -985,7 +985,7 @@ static void mxr_watchdog(unsigned long arg)
> spin_unlock_irqrestore(&layer->enq_slock, flags);
> }
>
> -static int stop_streaming(struct vb2_queue *vq)
> +static void stop_streaming(struct vb2_queue *vq)
> {
> struct mxr_layer *layer = vb2_get_drv_priv(vq);
> struct mxr_device *mdev = layer->mdev;
> @@ -1031,7 +1031,6 @@ static int stop_streaming(struct vb2_queue *vq)
> mxr_streamer_put(mdev);
> /* allow changes in output configuration */
> mxr_output_put(mdev);
> - return 0;
> }
>
> static struct vb2_ops mxr_video_qops = {
> diff --git a/drivers/media/platform/soc_camera/atmel-isi.c b/drivers/media/platform/soc_camera/atmel-isi.c
> index f0b6c90..38c723a 100644
> --- a/drivers/media/platform/soc_camera/atmel-isi.c
> +++ b/drivers/media/platform/soc_camera/atmel-isi.c
> @@ -406,7 +406,7 @@ static int start_streaming(struct vb2_queue *vq, unsigned int count)
> }
>
> /* abort streaming and wait for last buffer */
> -static int stop_streaming(struct vb2_queue *vq)
> +static void stop_streaming(struct vb2_queue *vq)
> {
> struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
> struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
> @@ -433,7 +433,7 @@ static int stop_streaming(struct vb2_queue *vq)
> if (time_after(jiffies, timeout)) {
> dev_err(icd->parent,
> "Timeout waiting for finishing codec request\n");
> - return -ETIMEDOUT;
> + return;
> }
>
> /* Disable interrupts */
> @@ -444,8 +444,6 @@ static int stop_streaming(struct vb2_queue *vq)
> ret = atmel_isi_wait_status(isi, WAIT_ISI_DISABLE);
> if (ret < 0)
> dev_err(icd->parent, "Disable ISI timed out\n");
> -
> - return ret;
> }
>
> static struct vb2_ops isi_video_qops = {
> diff --git a/drivers/media/platform/soc_camera/mx2_camera.c b/drivers/media/platform/soc_camera/mx2_camera.c
> index 3e84480..b40bc2e 100644
> --- a/drivers/media/platform/soc_camera/mx2_camera.c
> +++ b/drivers/media/platform/soc_camera/mx2_camera.c
> @@ -741,7 +741,7 @@ static int mx2_start_streaming(struct vb2_queue *q, unsigned int count)
> return 0;
> }
>
> -static int mx2_stop_streaming(struct vb2_queue *q)
> +static void mx2_stop_streaming(struct vb2_queue *q)
> {
> struct soc_camera_device *icd = soc_camera_from_vb2q(q);
> struct soc_camera_host *ici =
> @@ -773,8 +773,6 @@ static int mx2_stop_streaming(struct vb2_queue *q)
>
> dma_free_coherent(ici->v4l2_dev.dev,
> pcdev->discard_size, b, pcdev->discard_buffer_dma);
> -
> - return 0;
> }
>
> static struct vb2_ops mx2_videobuf_ops = {
> diff --git a/drivers/media/platform/soc_camera/mx3_camera.c b/drivers/media/platform/soc_camera/mx3_camera.c
> index 9ed81ac..2bbf608 100644
> --- a/drivers/media/platform/soc_camera/mx3_camera.c
> +++ b/drivers/media/platform/soc_camera/mx3_camera.c
> @@ -406,7 +406,7 @@ static int mx3_videobuf_init(struct vb2_buffer *vb)
> return 0;
> }
>
> -static int mx3_stop_streaming(struct vb2_queue *q)
> +static void mx3_stop_streaming(struct vb2_queue *q)
> {
> struct soc_camera_device *icd = soc_camera_from_vb2q(q);
> struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
> @@ -605,8 +605,6 @@ static int mx3_camera_try_bus_param(struct soc_camera_device *icd,
> } else if (ret != -ENOIOCTLCMD) {
> return ret;
> }
> -
> - return 0;
> }
>
> static bool chan_filter(struct dma_chan *chan, void *arg)
> diff --git a/drivers/media/platform/soc_camera/rcar_vin.c b/drivers/media/platform/soc_camera/rcar_vin.c
> index 0ff5cfa..e6287fb 100644
> --- a/drivers/media/platform/soc_camera/rcar_vin.c
> +++ b/drivers/media/platform/soc_camera/rcar_vin.c
> @@ -505,7 +505,7 @@ static int rcar_vin_videobuf_init(struct vb2_buffer *vb)
> return 0;
> }
>
> -static int rcar_vin_stop_streaming(struct vb2_queue *vq)
> +static void rcar_vin_stop_streaming(struct vb2_queue *vq)
> {
> struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
> struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
> @@ -516,8 +516,6 @@ static int rcar_vin_stop_streaming(struct vb2_queue *vq)
> list_for_each_safe(buf_head, tmp, &priv->capture)
> list_del_init(buf_head);
> spin_unlock_irq(&priv->lock);
> -
> - return 0;
> }
>
> static struct vb2_ops rcar_vin_vb2_ops = {
> diff --git a/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c b/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c
> index 3e75a46..20ad4a5 100644
> --- a/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c
> +++ b/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c
> @@ -471,7 +471,7 @@ static int sh_mobile_ceu_videobuf_init(struct vb2_buffer *vb)
> return 0;
> }
>
> -static int sh_mobile_ceu_stop_streaming(struct vb2_queue *q)
> +static void sh_mobile_ceu_stop_streaming(struct vb2_queue *q)
> {
> struct soc_camera_device *icd = container_of(q, struct soc_camera_device, vb2_vidq);
> struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
> @@ -487,7 +487,7 @@ static int sh_mobile_ceu_stop_streaming(struct vb2_queue *q)
>
> spin_unlock_irq(&pcdev->lock);
>
> - return sh_mobile_ceu_soft_reset(pcdev);
> + sh_mobile_ceu_soft_reset(pcdev);
> }
>
> static struct vb2_ops sh_mobile_ceu_videobuf_ops = {
> diff --git a/drivers/media/platform/vivi.c b/drivers/media/platform/vivi.c
> index 3890f4f..d00bf3d 100644
> --- a/drivers/media/platform/vivi.c
> +++ b/drivers/media/platform/vivi.c
> @@ -906,12 +906,11 @@ static int start_streaming(struct vb2_queue *vq, unsigned int count)
> }
>
> /* abort streaming and wait for last buffer */
> -static int stop_streaming(struct vb2_queue *vq)
> +static void stop_streaming(struct vb2_queue *vq)
> {
> struct vivi_dev *dev = vb2_get_drv_priv(vq);
> dprintk(dev, 1, "%s\n", __func__);
> vivi_stop_generating(dev);
> - return 0;
> }
>
> static void vivi_lock(struct vb2_queue *vq)
> diff --git a/drivers/media/platform/vsp1/vsp1_video.c b/drivers/media/platform/vsp1/vsp1_video.c
> index e41f07d..767d5c5 100644
> --- a/drivers/media/platform/vsp1/vsp1_video.c
> +++ b/drivers/media/platform/vsp1/vsp1_video.c
> @@ -720,7 +720,7 @@ static int vsp1_video_start_streaming(struct vb2_queue *vq, unsigned int count)
> return 0;
> }
>
> -static int vsp1_video_stop_streaming(struct vb2_queue *vq)
> +static void vsp1_video_stop_streaming(struct vb2_queue *vq)
> {
> struct vsp1_video *video = vb2_get_drv_priv(vq);
> struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity);
> @@ -743,8 +743,6 @@ static int vsp1_video_stop_streaming(struct vb2_queue *vq)
> spin_lock_irqsave(&video->irqlock, flags);
> INIT_LIST_HEAD(&video->irqqueue);
> spin_unlock_irqrestore(&video->irqlock, flags);
> -
> - return 0;
> }
>
> static struct vb2_ops vsp1_video_queue_qops = {
> diff --git a/drivers/media/usb/em28xx/em28xx-v4l.h b/drivers/media/usb/em28xx/em28xx-v4l.h
> index bce4386..432862c 100644
> --- a/drivers/media/usb/em28xx/em28xx-v4l.h
> +++ b/drivers/media/usb/em28xx/em28xx-v4l.h
> @@ -16,5 +16,5 @@
>
>
> int em28xx_start_analog_streaming(struct vb2_queue *vq, unsigned int count);
> -int em28xx_stop_vbi_streaming(struct vb2_queue *vq);
> +void em28xx_stop_vbi_streaming(struct vb2_queue *vq);
> extern struct vb2_ops em28xx_vbi_qops;
> diff --git a/drivers/media/usb/em28xx/em28xx-video.c b/drivers/media/usb/em28xx/em28xx-video.c
> index 0856e5d..cdcd751 100644
> --- a/drivers/media/usb/em28xx/em28xx-video.c
> +++ b/drivers/media/usb/em28xx/em28xx-video.c
> @@ -937,7 +937,7 @@ int em28xx_start_analog_streaming(struct vb2_queue *vq, unsigned int count)
> return rc;
> }
>
> -static int em28xx_stop_streaming(struct vb2_queue *vq)
> +static void em28xx_stop_streaming(struct vb2_queue *vq)
> {
> struct em28xx *dev = vb2_get_drv_priv(vq);
> struct em28xx_dmaqueue *vidq = &dev->vidq;
> @@ -961,11 +961,9 @@ static int em28xx_stop_streaming(struct vb2_queue *vq)
> }
> dev->usb_ctl.vid_buf = NULL;
> spin_unlock_irqrestore(&dev->slock, flags);
> -
> - return 0;
> }
>
> -int em28xx_stop_vbi_streaming(struct vb2_queue *vq)
> +void em28xx_stop_vbi_streaming(struct vb2_queue *vq)
> {
> struct em28xx *dev = vb2_get_drv_priv(vq);
> struct em28xx_dmaqueue *vbiq = &dev->vbiq;
> @@ -989,8 +987,6 @@ int em28xx_stop_vbi_streaming(struct vb2_queue *vq)
> }
> dev->usb_ctl.vbi_buf = NULL;
> spin_unlock_irqrestore(&dev->slock, flags);
> -
> - return 0;
> }
>
> static void
> diff --git a/drivers/media/usb/pwc/pwc-if.c b/drivers/media/usb/pwc/pwc-if.c
> index 84a6720..a73b0bc 100644
> --- a/drivers/media/usb/pwc/pwc-if.c
> +++ b/drivers/media/usb/pwc/pwc-if.c
> @@ -681,12 +681,11 @@ static int start_streaming(struct vb2_queue *vq, unsigned int count)
> return r;
> }
>
> -static int stop_streaming(struct vb2_queue *vq)
> +static void stop_streaming(struct vb2_queue *vq)
> {
> struct pwc_device *pdev = vb2_get_drv_priv(vq);
>
> - if (mutex_lock_interruptible(&pdev->v4l2_lock))
> - return -ERESTARTSYS;
> + mutex_lock(&pdev->v4l2_lock);
> if (pdev->udev) {
> pwc_set_leds(pdev, 0, 0);
> pwc_camera_power(pdev, 0);
> @@ -695,8 +694,6 @@ static int stop_streaming(struct vb2_queue *vq)
>
> pwc_cleanup_queued_bufs(pdev);
> mutex_unlock(&pdev->v4l2_lock);
> -
> - return 0;
> }
>
> static struct vb2_ops pwc_vb_queue_ops = {
> diff --git a/drivers/media/usb/s2255/s2255drv.c b/drivers/media/usb/s2255/s2255drv.c
> index 4c7513a..60e4929 100644
> --- a/drivers/media/usb/s2255/s2255drv.c
> +++ b/drivers/media/usb/s2255/s2255drv.c
> @@ -714,7 +714,7 @@ static void buffer_queue(struct vb2_buffer *vb)
> }
>
> static int start_streaming(struct vb2_queue *vq, unsigned int count);
> -static int stop_streaming(struct vb2_queue *vq);
> +static void stop_streaming(struct vb2_queue *vq);
>
> static struct vb2_ops s2255_video_qops = {
> .queue_setup = queue_setup,
> @@ -1109,7 +1109,7 @@ static int start_streaming(struct vb2_queue *vq, unsigned int count)
> }
>
> /* abort streaming and wait for last buffer */
> -static int stop_streaming(struct vb2_queue *vq)
> +static void stop_streaming(struct vb2_queue *vq)
> {
> struct s2255_vc *vc = vb2_get_drv_priv(vq);
> struct s2255_buffer *buf, *node;
> @@ -1123,7 +1123,6 @@ static int stop_streaming(struct vb2_queue *vq)
> buf, buf->vb.v4l2_buf.index);
> }
> spin_unlock_irqrestore(&vc->qlock, flags);
> - return 0;
> }
>
> static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id i)
> diff --git a/drivers/media/usb/stk1160/stk1160-v4l.c b/drivers/media/usb/stk1160/stk1160-v4l.c
> index 37bc00f..46e8a50 100644
> --- a/drivers/media/usb/stk1160/stk1160-v4l.c
> +++ b/drivers/media/usb/stk1160/stk1160-v4l.c
> @@ -583,10 +583,10 @@ static int start_streaming(struct vb2_queue *vq, unsigned int count)
> }
>
> /* abort streaming and wait for last buffer */
> -static int stop_streaming(struct vb2_queue *vq)
> +static void stop_streaming(struct vb2_queue *vq)
> {
> struct stk1160 *dev = vb2_get_drv_priv(vq);
> - return stk1160_stop_streaming(dev);
> + stk1160_stop_streaming(dev);
> }
>
> static struct vb2_ops stk1160_video_qops = {
> diff --git a/drivers/media/usb/usbtv/usbtv-video.c b/drivers/media/usb/usbtv/usbtv-video.c
> index 01ed1ec8..d2f24ad 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);
> }
>
> struct vb2_ops usbtv_vb2_ops = {
> diff --git a/drivers/staging/media/davinci_vpfe/vpfe_video.c b/drivers/staging/media/davinci_vpfe/vpfe_video.c
> index 8c101cb..baeceee 100644
> --- a/drivers/staging/media/davinci_vpfe/vpfe_video.c
> +++ b/drivers/staging/media/davinci_vpfe/vpfe_video.c
> @@ -1242,7 +1242,7 @@ static int vpfe_buffer_init(struct vb2_buffer *vb)
> }
>
> /* abort streaming and wait for last buffer */
> -static int vpfe_stop_streaming(struct vb2_queue *vq)
> +static void vpfe_stop_streaming(struct vb2_queue *vq)
> {
> struct vpfe_fh *fh = vb2_get_drv_priv(vq);
> struct vpfe_video_device *video = fh->video;
> @@ -1256,7 +1256,6 @@ static int vpfe_stop_streaming(struct vb2_queue *vq)
> list_del(&video->next_frm->list);
> vb2_buffer_done(&video->next_frm->vb, VB2_BUF_STATE_ERROR);
> }
> - return 0;
> }
>
> static void vpfe_buf_cleanup(struct vb2_buffer *vb)
> diff --git a/drivers/staging/media/dt3155v4l/dt3155v4l.c b/drivers/staging/media/dt3155v4l/dt3155v4l.c
> index e235787..3b97a05 100644
> --- a/drivers/staging/media/dt3155v4l/dt3155v4l.c
> +++ b/drivers/staging/media/dt3155v4l/dt3155v4l.c
> @@ -263,7 +263,7 @@ dt3155_buf_prepare(struct vb2_buffer *vb)
> return 0;
> }
>
> -static int
> +static void
> dt3155_stop_streaming(struct vb2_queue *q)
> {
> struct dt3155_priv *pd = vb2_get_drv_priv(q);
> @@ -277,7 +277,6 @@ dt3155_stop_streaming(struct vb2_queue *q)
> }
> spin_unlock_irq(&pd->lock);
> msleep(45); /* irq hendler will stop the hardware */
> - return 0;
> }
>
> static void
> diff --git a/drivers/staging/media/go7007/go7007-v4l2.c b/drivers/staging/media/go7007/go7007-v4l2.c
> index a349878..818acdde 100644
> --- a/drivers/staging/media/go7007/go7007-v4l2.c
> +++ b/drivers/staging/media/go7007/go7007-v4l2.c
> @@ -515,7 +515,7 @@ static int go7007_start_streaming(struct vb2_queue *q, unsigned int count)
> return ret;
> }
>
> -static int go7007_stop_streaming(struct vb2_queue *q)
> +static void go7007_stop_streaming(struct vb2_queue *q)
> {
> struct go7007 *go = vb2_get_drv_priv(q);
> unsigned long flags;
> @@ -537,7 +537,6 @@ static int go7007_stop_streaming(struct vb2_queue *q)
> /* Turn on Capture LED */
> if (go->board_id == GO7007_BOARDID_ADS_USBAV_709)
> go7007_write_addr(go, 0x3c82, 0x000d);
> - return 0;
> }
>
> static struct vb2_ops go7007_video_qops = {
> diff --git a/drivers/staging/media/msi3101/sdr-msi3101.c b/drivers/staging/media/msi3101/sdr-msi3101.c
> index 04ff29e..2136e60 100644
> --- a/drivers/staging/media/msi3101/sdr-msi3101.c
> +++ b/drivers/staging/media/msi3101/sdr-msi3101.c
> @@ -1577,13 +1577,12 @@ static int msi3101_start_streaming(struct vb2_queue *vq, unsigned int count)
> return ret;
> }
>
> -static int msi3101_stop_streaming(struct vb2_queue *vq)
> +static void msi3101_stop_streaming(struct vb2_queue *vq)
> {
> struct msi3101_state *s = vb2_get_drv_priv(vq);
> dev_dbg(&s->udev->dev, "%s:\n", __func__);
>
> - if (mutex_lock_interruptible(&s->v4l2_lock))
> - return -ERESTARTSYS;
> + mutex_lock(&s->v4l2_lock);
>
> if (s->udev)
> msi3101_isoc_cleanup(s);
> @@ -1595,8 +1594,6 @@ static int msi3101_stop_streaming(struct vb2_queue *vq)
> msi3101_ctrl_msg(s, CMD_STOP_STREAMING, 0);
>
> mutex_unlock(&s->v4l2_lock);
> -
> - return 0;
> }
>
> static struct vb2_ops msi3101_vb2_ops = {
> diff --git a/drivers/staging/media/solo6x10/solo6x10-v4l2-enc.c b/drivers/staging/media/solo6x10/solo6x10-v4l2-enc.c
> index edcabcd..e056476 100644
> --- a/drivers/staging/media/solo6x10/solo6x10-v4l2-enc.c
> +++ b/drivers/staging/media/solo6x10/solo6x10-v4l2-enc.c
> @@ -741,14 +741,13 @@ static int solo_enc_start_streaming(struct vb2_queue *q, unsigned int count)
> return solo_ring_start(solo_enc->solo_dev);
> }
>
> -static int solo_enc_stop_streaming(struct vb2_queue *q)
> +static void solo_enc_stop_streaming(struct vb2_queue *q)
> {
> struct solo_enc_dev *solo_enc = vb2_get_drv_priv(q);
>
> solo_enc_off(solo_enc);
> INIT_LIST_HEAD(&solo_enc->vidq_active);
> solo_ring_stop(solo_enc->solo_dev);
> - return 0;
> }
>
> static struct vb2_ops solo_enc_video_qops = {
> diff --git a/drivers/staging/media/solo6x10/solo6x10-v4l2.c b/drivers/staging/media/solo6x10/solo6x10-v4l2.c
> index 1815f76..5d0100e 100644
> --- a/drivers/staging/media/solo6x10/solo6x10-v4l2.c
> +++ b/drivers/staging/media/solo6x10/solo6x10-v4l2.c
> @@ -336,13 +336,12 @@ static int solo_start_streaming(struct vb2_queue *q, unsigned int count)
> return solo_start_thread(solo_dev);
> }
>
> -static int solo_stop_streaming(struct vb2_queue *q)
> +static void solo_stop_streaming(struct vb2_queue *q)
> {
> struct solo_dev *solo_dev = vb2_get_drv_priv(q);
>
> solo_stop_thread(solo_dev);
> INIT_LIST_HEAD(&solo_dev->vidq_active);
> - return 0;
> }
>
> static void solo_buf_queue(struct vb2_buffer *vb)
> diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
> index af46211..3b57851 100644
> --- a/include/media/videobuf2-core.h
> +++ b/include/media/videobuf2-core.h
> @@ -323,7 +323,7 @@ struct vb2_ops {
> void (*buf_cleanup)(struct vb2_buffer *vb);
>
> int (*start_streaming)(struct vb2_queue *q, unsigned int count);
> - int (*stop_streaming)(struct vb2_queue *q);
> + void (*stop_streaming)(struct vb2_queue *q);
>
> void (*buf_queue)(struct vb2_buffer *vb);
> };
> --
> 1.9.0
>
--
Best regards,
Pawel Osciak
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