Hi Laurent,
Thanks for your patch.
On 2016-09-14 02:16:55 +0300, Laurent Pinchart wrote:
> The subdev userspace API isn't serialized in the core, serialize access
> to formats and selection rectangles in the driver.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
> ---
> drivers/media/platform/vsp1/vsp1_bru.c | 28 +++++++++++++++-----
> drivers/media/platform/vsp1/vsp1_clu.c | 15 ++++++++---
> drivers/media/platform/vsp1/vsp1_entity.c | 22 +++++++++++++---
> drivers/media/platform/vsp1/vsp1_entity.h | 4 ++-
> drivers/media/platform/vsp1/vsp1_hsit.c | 15 ++++++++---
> drivers/media/platform/vsp1/vsp1_lif.c | 15 ++++++++---
> drivers/media/platform/vsp1/vsp1_lut.c | 15 ++++++++---
> drivers/media/platform/vsp1/vsp1_rwpf.c | 44 +++++++++++++++++++++++--------
> drivers/media/platform/vsp1/vsp1_sru.c | 26 +++++++++++++-----
> drivers/media/platform/vsp1/vsp1_uds.c | 26 +++++++++++++-----
> 10 files changed, 161 insertions(+), 49 deletions(-)
>
> diff --git a/drivers/media/platform/vsp1/vsp1_bru.c b/drivers/media/platform/vsp1/vsp1_bru.c
> index 8268b87727a7..26b9e2282a41 100644
> --- a/drivers/media/platform/vsp1/vsp1_bru.c
> +++ b/drivers/media/platform/vsp1/vsp1_bru.c
> @@ -142,10 +142,15 @@ static int bru_set_format(struct v4l2_subdev *subdev,
> struct vsp1_bru *bru = to_bru(subdev);
> struct v4l2_subdev_pad_config *config;
> struct v4l2_mbus_framefmt *format;
> + int ret = 0;
> +
> + mutex_lock(&bru->entity.lock);
>
> config = vsp1_entity_get_pad_config(&bru->entity, cfg, fmt->which);
> - if (!config)
> - return -EINVAL;
> + if (!config) {
> + goto done;
> + ret = -EINVAL;
This looks funny to me, you probably intended to do that in the other
order right? If you fix this feel free to add my:
Acked-by: Niklas Söderlund <niklas.soderlund@xxxxxxxxxxxx>
> + }
>
> bru_try_format(bru, config, fmt->pad, &fmt->format);
>
> @@ -174,7 +179,9 @@ static int bru_set_format(struct v4l2_subdev *subdev,
> }
> }
>
> - return 0;
> +done:
> + mutex_unlock(&bru->entity.lock);
> + return ret;
> }
>
> static int bru_get_selection(struct v4l2_subdev *subdev,
> @@ -201,7 +208,9 @@ static int bru_get_selection(struct v4l2_subdev *subdev,
> if (!config)
> return -EINVAL;
>
> + mutex_lock(&bru->entity.lock);
> sel->r = *bru_get_compose(bru, config, sel->pad);
> + mutex_unlock(&bru->entity.lock);
> return 0;
>
> default:
> @@ -217,6 +226,7 @@ static int bru_set_selection(struct v4l2_subdev *subdev,
> struct v4l2_subdev_pad_config *config;
> struct v4l2_mbus_framefmt *format;
> struct v4l2_rect *compose;
> + int ret = 0;
>
> if (sel->pad == bru->entity.source_pad)
> return -EINVAL;
> @@ -224,9 +234,13 @@ static int bru_set_selection(struct v4l2_subdev *subdev,
> if (sel->target != V4L2_SEL_TGT_COMPOSE)
> return -EINVAL;
>
> + mutex_lock(&bru->entity.lock);
> +
> config = vsp1_entity_get_pad_config(&bru->entity, cfg, sel->which);
> - if (!config)
> - return -EINVAL;
> + if (!config) {
> + ret = -EINVAL;
> + goto done;
> + }
>
> /* The compose rectangle top left corner must be inside the output
> * frame.
> @@ -246,7 +260,9 @@ static int bru_set_selection(struct v4l2_subdev *subdev,
> compose = bru_get_compose(bru, config, sel->pad);
> *compose = sel->r;
>
> - return 0;
> +done:
> + mutex_unlock(&bru->entity.lock);
> + return ret;
> }
>
> static const struct v4l2_subdev_pad_ops bru_pad_ops = {
> diff --git a/drivers/media/platform/vsp1/vsp1_clu.c b/drivers/media/platform/vsp1/vsp1_clu.c
> index b63d2dbe5ea3..e1fd03811dda 100644
> --- a/drivers/media/platform/vsp1/vsp1_clu.c
> +++ b/drivers/media/platform/vsp1/vsp1_clu.c
> @@ -148,10 +148,15 @@ static int clu_set_format(struct v4l2_subdev *subdev,
> struct vsp1_clu *clu = to_clu(subdev);
> struct v4l2_subdev_pad_config *config;
> struct v4l2_mbus_framefmt *format;
> + int ret = 0;
> +
> + mutex_lock(&clu->entity.lock);
>
> config = vsp1_entity_get_pad_config(&clu->entity, cfg, fmt->which);
> - if (!config)
> - return -EINVAL;
> + if (!config) {
> + ret = -EINVAL;
> + goto done;
> + }
>
> /* Default to YUV if the requested format is not supported. */
> if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
> @@ -164,7 +169,7 @@ static int clu_set_format(struct v4l2_subdev *subdev,
> if (fmt->pad == CLU_PAD_SOURCE) {
> /* The CLU output format can't be modified. */
> fmt->format = *format;
> - return 0;
> + goto done;
> }
>
> format->code = fmt->format.code;
> @@ -182,7 +187,9 @@ static int clu_set_format(struct v4l2_subdev *subdev,
> CLU_PAD_SOURCE);
> *format = fmt->format;
>
> - return 0;
> +done:
> + mutex_unlock(&clu->entity.lock);
> + return ret;
> }
>
> /* -----------------------------------------------------------------------------
> diff --git a/drivers/media/platform/vsp1/vsp1_entity.c b/drivers/media/platform/vsp1/vsp1_entity.c
> index 4cf6cc719c00..da673495c222 100644
> --- a/drivers/media/platform/vsp1/vsp1_entity.c
> +++ b/drivers/media/platform/vsp1/vsp1_entity.c
> @@ -51,6 +51,9 @@ void vsp1_entity_route_setup(struct vsp1_entity *source,
> * @cfg: the TRY pad configuration
> * @which: configuration selector (ACTIVE or TRY)
> *
> + * When called with which set to V4L2_SUBDEV_FORMAT_ACTIVE the caller must hold
> + * the entity lock to access the returned configuration.
> + *
> * Return the pad configuration requested by the which argument. The TRY
> * configuration is passed explicitly to the function through the cfg argument
> * and simply returned when requested. The ACTIVE configuration comes from the
> @@ -160,7 +163,9 @@ int vsp1_subdev_get_pad_format(struct v4l2_subdev *subdev,
> if (!config)
> return -EINVAL;
>
> + mutex_lock(&entity->lock);
> fmt->format = *vsp1_entity_get_pad_format(entity, config, fmt->pad);
> + mutex_unlock(&entity->lock);
>
> return 0;
> }
> @@ -204,8 +209,10 @@ int vsp1_subdev_enum_mbus_code(struct v4l2_subdev *subdev,
> if (!config)
> return -EINVAL;
>
> + mutex_lock(&entity->lock);
> format = vsp1_entity_get_pad_format(entity, config, 0);
> code->code = format->code;
> + mutex_unlock(&entity->lock);
> }
>
> return 0;
> @@ -235,6 +242,7 @@ int vsp1_subdev_enum_frame_size(struct v4l2_subdev *subdev,
> struct vsp1_entity *entity = to_vsp1_entity(subdev);
> struct v4l2_subdev_pad_config *config;
> struct v4l2_mbus_framefmt *format;
> + int ret = 0;
>
> config = vsp1_entity_get_pad_config(entity, cfg, fse->which);
> if (!config)
> @@ -242,8 +250,12 @@ int vsp1_subdev_enum_frame_size(struct v4l2_subdev *subdev,
>
> format = vsp1_entity_get_pad_format(entity, config, fse->pad);
>
> - if (fse->index || fse->code != format->code)
> - return -EINVAL;
> + mutex_lock(&entity->lock);
> +
> + if (fse->index || fse->code != format->code) {
> + ret = -EINVAL;
> + goto done;
> + }
>
> if (fse->pad == 0) {
> fse->min_width = min_width;
> @@ -260,7 +272,9 @@ int vsp1_subdev_enum_frame_size(struct v4l2_subdev *subdev,
> fse->max_height = format->height;
> }
>
> - return 0;
> +done:
> + mutex_unlock(&entity->lock);
> + return ret;
> }
>
> /* -----------------------------------------------------------------------------
> @@ -358,6 +372,8 @@ int vsp1_entity_init(struct vsp1_device *vsp1, struct vsp1_entity *entity,
> if (i == ARRAY_SIZE(vsp1_routes))
> return -EINVAL;
>
> + mutex_init(&entity->lock);
> +
> entity->vsp1 = vsp1;
> entity->source_pad = num_pads - 1;
>
> diff --git a/drivers/media/platform/vsp1/vsp1_entity.h b/drivers/media/platform/vsp1/vsp1_entity.h
> index b43457fd2c43..b5e4dbb1f7d4 100644
> --- a/drivers/media/platform/vsp1/vsp1_entity.h
> +++ b/drivers/media/platform/vsp1/vsp1_entity.h
> @@ -14,7 +14,7 @@
> #define __VSP1_ENTITY_H__
>
> #include <linux/list.h>
> -#include <linux/spinlock.h>
> +#include <linux/mutex.h>
>
> #include <media/v4l2-subdev.h>
>
> @@ -96,6 +96,8 @@ struct vsp1_entity {
>
> struct v4l2_subdev subdev;
> struct v4l2_subdev_pad_config *config;
> +
> + struct mutex lock; /* Protects the pad config */
> };
>
> static inline struct vsp1_entity *to_vsp1_entity(struct v4l2_subdev *subdev)
> diff --git a/drivers/media/platform/vsp1/vsp1_hsit.c b/drivers/media/platform/vsp1/vsp1_hsit.c
> index 6e5077beb38c..6ffbedb5c095 100644
> --- a/drivers/media/platform/vsp1/vsp1_hsit.c
> +++ b/drivers/media/platform/vsp1/vsp1_hsit.c
> @@ -71,10 +71,15 @@ static int hsit_set_format(struct v4l2_subdev *subdev,
> struct vsp1_hsit *hsit = to_hsit(subdev);
> struct v4l2_subdev_pad_config *config;
> struct v4l2_mbus_framefmt *format;
> + int ret = 0;
> +
> + mutex_lock(&hsit->entity.lock);
>
> config = vsp1_entity_get_pad_config(&hsit->entity, cfg, fmt->which);
> - if (!config)
> - return -EINVAL;
> + if (!config) {
> + ret = -EINVAL;
> + goto done;
> + }
>
> format = vsp1_entity_get_pad_format(&hsit->entity, config, fmt->pad);
>
> @@ -83,7 +88,7 @@ static int hsit_set_format(struct v4l2_subdev *subdev,
> * modified.
> */
> fmt->format = *format;
> - return 0;
> + goto done;
> }
>
> format->code = hsit->inverse ? MEDIA_BUS_FMT_AHSV8888_1X32
> @@ -104,7 +109,9 @@ static int hsit_set_format(struct v4l2_subdev *subdev,
> format->code = hsit->inverse ? MEDIA_BUS_FMT_ARGB8888_1X32
> : MEDIA_BUS_FMT_AHSV8888_1X32;
>
> - return 0;
> +done:
> + mutex_unlock(&hsit->entity.lock);
> + return ret;
> }
>
> static const struct v4l2_subdev_pad_ops hsit_pad_ops = {
> diff --git a/drivers/media/platform/vsp1/vsp1_lif.c b/drivers/media/platform/vsp1/vsp1_lif.c
> index a720063f38c5..702df863b13a 100644
> --- a/drivers/media/platform/vsp1/vsp1_lif.c
> +++ b/drivers/media/platform/vsp1/vsp1_lif.c
> @@ -66,10 +66,15 @@ static int lif_set_format(struct v4l2_subdev *subdev,
> struct vsp1_lif *lif = to_lif(subdev);
> struct v4l2_subdev_pad_config *config;
> struct v4l2_mbus_framefmt *format;
> + int ret = 0;
> +
> + mutex_lock(&lif->entity.lock);
>
> config = vsp1_entity_get_pad_config(&lif->entity, cfg, fmt->which);
> - if (!config)
> - return -EINVAL;
> + if (!config) {
> + ret = -EINVAL;
> + goto done;
> + }
>
> /* Default to YUV if the requested format is not supported. */
> if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
> @@ -83,7 +88,7 @@ static int lif_set_format(struct v4l2_subdev *subdev,
> * format.
> */
> fmt->format = *format;
> - return 0;
> + goto done;
> }
>
> format->code = fmt->format.code;
> @@ -101,7 +106,9 @@ static int lif_set_format(struct v4l2_subdev *subdev,
> LIF_PAD_SOURCE);
> *format = fmt->format;
>
> - return 0;
> +done:
> + mutex_unlock(&lif->entity.lock);
> + return ret;
> }
>
> static const struct v4l2_subdev_pad_ops lif_pad_ops = {
> diff --git a/drivers/media/platform/vsp1/vsp1_lut.c b/drivers/media/platform/vsp1/vsp1_lut.c
> index dc31de9602ba..e1c0bb7535e4 100644
> --- a/drivers/media/platform/vsp1/vsp1_lut.c
> +++ b/drivers/media/platform/vsp1/vsp1_lut.c
> @@ -124,10 +124,15 @@ static int lut_set_format(struct v4l2_subdev *subdev,
> struct vsp1_lut *lut = to_lut(subdev);
> struct v4l2_subdev_pad_config *config;
> struct v4l2_mbus_framefmt *format;
> + int ret = 0;
> +
> + mutex_lock(&lut->entity.lock);
>
> config = vsp1_entity_get_pad_config(&lut->entity, cfg, fmt->which);
> - if (!config)
> - return -EINVAL;
> + if (!config) {
> + ret = -EINVAL;
> + goto done;
> + }
>
> /* Default to YUV if the requested format is not supported. */
> if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
> @@ -140,7 +145,7 @@ static int lut_set_format(struct v4l2_subdev *subdev,
> if (fmt->pad == LUT_PAD_SOURCE) {
> /* The LUT output format can't be modified. */
> fmt->format = *format;
> - return 0;
> + goto done;
> }
>
> format->code = fmt->format.code;
> @@ -158,7 +163,9 @@ static int lut_set_format(struct v4l2_subdev *subdev,
> LUT_PAD_SOURCE);
> *format = fmt->format;
>
> - return 0;
> +done:
> + mutex_unlock(&lut->entity.lock);
> + return ret;
> }
>
> /* -----------------------------------------------------------------------------
> diff --git a/drivers/media/platform/vsp1/vsp1_rwpf.c b/drivers/media/platform/vsp1/vsp1_rwpf.c
> index 8d461b375e91..8cb87e96b78b 100644
> --- a/drivers/media/platform/vsp1/vsp1_rwpf.c
> +++ b/drivers/media/platform/vsp1/vsp1_rwpf.c
> @@ -67,10 +67,15 @@ static int vsp1_rwpf_set_format(struct v4l2_subdev *subdev,
> struct v4l2_subdev_pad_config *config;
> struct v4l2_mbus_framefmt *format;
> struct v4l2_rect *crop;
> + int ret = 0;
> +
> + mutex_lock(&rwpf->entity.lock);
>
> config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, fmt->which);
> - if (!config)
> - return -EINVAL;
> + if (!config) {
> + ret = -EINVAL;
> + goto done;
> + }
>
> /* Default to YUV if the requested format is not supported. */
> if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
> @@ -85,7 +90,7 @@ static int vsp1_rwpf_set_format(struct v4l2_subdev *subdev,
> */
> format->code = fmt->format.code;
> fmt->format = *format;
> - return 0;
> + goto done;
> }
>
> format->code = fmt->format.code;
> @@ -110,7 +115,9 @@ static int vsp1_rwpf_set_format(struct v4l2_subdev *subdev,
> RWPF_PAD_SOURCE);
> *format = fmt->format;
>
> - return 0;
> +done:
> + mutex_unlock(&rwpf->entity.lock);
> + return ret;
> }
>
> static int vsp1_rwpf_get_selection(struct v4l2_subdev *subdev,
> @@ -120,14 +127,19 @@ static int vsp1_rwpf_get_selection(struct v4l2_subdev *subdev,
> struct vsp1_rwpf *rwpf = to_rwpf(subdev);
> struct v4l2_subdev_pad_config *config;
> struct v4l2_mbus_framefmt *format;
> + int ret = 0;
>
> /* Cropping is implemented on the sink pad. */
> if (sel->pad != RWPF_PAD_SINK)
> return -EINVAL;
>
> + mutex_lock(&rwpf->entity.lock);
> +
> config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, sel->which);
> - if (!config)
> - return -EINVAL;
> + if (!config) {
> + ret = -EINVAL;
> + goto done;
> + }
>
> switch (sel->target) {
> case V4L2_SEL_TGT_CROP:
> @@ -144,10 +156,13 @@ static int vsp1_rwpf_get_selection(struct v4l2_subdev *subdev,
> break;
>
> default:
> - return -EINVAL;
> + ret = -EINVAL;
> + break;
> }
Nit-picking, maybe use goto here instead of break? I'm always scared of
constructs like this since code might get added after the switch
statement and this is a error path.
>
> - return 0;
> +done:
> + mutex_unlock(&rwpf->entity.lock);
> + return ret;
> }
>
> static int vsp1_rwpf_set_selection(struct v4l2_subdev *subdev,
> @@ -158,6 +173,7 @@ static int vsp1_rwpf_set_selection(struct v4l2_subdev *subdev,
> struct v4l2_subdev_pad_config *config;
> struct v4l2_mbus_framefmt *format;
> struct v4l2_rect *crop;
> + int ret = 0;
>
> /* Cropping is implemented on the sink pad. */
> if (sel->pad != RWPF_PAD_SINK)
> @@ -166,9 +182,13 @@ static int vsp1_rwpf_set_selection(struct v4l2_subdev *subdev,
> if (sel->target != V4L2_SEL_TGT_CROP)
> return -EINVAL;
>
> + mutex_lock(&rwpf->entity.lock);
> +
> config = vsp1_entity_get_pad_config(&rwpf->entity, cfg, sel->which);
> - if (!config)
> - return -EINVAL;
> + if (!config) {
> + ret = -EINVAL;
> + goto done;
> + }
>
> /* Make sure the crop rectangle is entirely contained in the image. The
> * WPF top and left offsets are limited to 255.
> @@ -206,7 +226,9 @@ static int vsp1_rwpf_set_selection(struct v4l2_subdev *subdev,
> format->width = crop->width;
> format->height = crop->height;
>
> - return 0;
> +done:
> + mutex_unlock(&rwpf->entity.lock);
> + return ret;
> }
>
> const struct v4l2_subdev_pad_ops vsp1_rwpf_pad_ops = {
> diff --git a/drivers/media/platform/vsp1/vsp1_sru.c b/drivers/media/platform/vsp1/vsp1_sru.c
> index 47f5e0cea2ce..6e13cdfa5ed4 100644
> --- a/drivers/media/platform/vsp1/vsp1_sru.c
> +++ b/drivers/media/platform/vsp1/vsp1_sru.c
> @@ -128,6 +128,7 @@ static int sru_enum_frame_size(struct v4l2_subdev *subdev,
> struct vsp1_sru *sru = to_sru(subdev);
> struct v4l2_subdev_pad_config *config;
> struct v4l2_mbus_framefmt *format;
> + int ret = 0;
>
> config = vsp1_entity_get_pad_config(&sru->entity, cfg, fse->which);
> if (!config)
> @@ -135,8 +136,12 @@ static int sru_enum_frame_size(struct v4l2_subdev *subdev,
>
> format = vsp1_entity_get_pad_format(&sru->entity, config, SRU_PAD_SINK);
>
> - if (fse->index || fse->code != format->code)
> - return -EINVAL;
> + mutex_lock(&sru->entity.lock);
> +
> + if (fse->index || fse->code != format->code) {
> + ret = -EINVAL;
> + goto done;
> + }
>
> if (fse->pad == SRU_PAD_SINK) {
> fse->min_width = SRU_MIN_SIZE;
> @@ -156,7 +161,9 @@ static int sru_enum_frame_size(struct v4l2_subdev *subdev,
> }
> }
>
> - return 0;
> +done:
> + mutex_unlock(&sru->entity.lock);
> + return ret;
> }
>
> static void sru_try_format(struct vsp1_sru *sru,
> @@ -217,10 +224,15 @@ static int sru_set_format(struct v4l2_subdev *subdev,
> struct vsp1_sru *sru = to_sru(subdev);
> struct v4l2_subdev_pad_config *config;
> struct v4l2_mbus_framefmt *format;
> + int ret = 0;
> +
> + mutex_lock(&sru->entity.lock);
>
> config = vsp1_entity_get_pad_config(&sru->entity, cfg, fmt->which);
> - if (!config)
> - return -EINVAL;
> + if (!config) {
> + ret = -EINVAL;
> + goto done;
> + }
>
> sru_try_format(sru, config, fmt->pad, &fmt->format);
>
> @@ -236,7 +248,9 @@ static int sru_set_format(struct v4l2_subdev *subdev,
> sru_try_format(sru, config, SRU_PAD_SOURCE, format);
> }
>
> - return 0;
> +done:
> + mutex_unlock(&sru->entity.lock);
> + return ret;
> }
>
> static const struct v4l2_subdev_pad_ops sru_pad_ops = {
> diff --git a/drivers/media/platform/vsp1/vsp1_uds.c b/drivers/media/platform/vsp1/vsp1_uds.c
> index 652dcd895022..a8fc893a31ee 100644
> --- a/drivers/media/platform/vsp1/vsp1_uds.c
> +++ b/drivers/media/platform/vsp1/vsp1_uds.c
> @@ -133,6 +133,7 @@ static int uds_enum_frame_size(struct v4l2_subdev *subdev,
> struct vsp1_uds *uds = to_uds(subdev);
> struct v4l2_subdev_pad_config *config;
> struct v4l2_mbus_framefmt *format;
> + int ret = 0;
>
> config = vsp1_entity_get_pad_config(&uds->entity, cfg, fse->which);
> if (!config)
> @@ -141,8 +142,12 @@ static int uds_enum_frame_size(struct v4l2_subdev *subdev,
> format = vsp1_entity_get_pad_format(&uds->entity, config,
> UDS_PAD_SINK);
>
> - if (fse->index || fse->code != format->code)
> - return -EINVAL;
> + mutex_lock(&uds->entity.lock);
> +
> + if (fse->index || fse->code != format->code) {
> + ret = -EINVAL;
> + goto done;
> + }
>
> if (fse->pad == UDS_PAD_SINK) {
> fse->min_width = UDS_MIN_SIZE;
> @@ -156,7 +161,9 @@ static int uds_enum_frame_size(struct v4l2_subdev *subdev,
> &fse->max_height);
> }
>
> - return 0;
> +done:
> + mutex_unlock(&uds->entity.lock);
> + return ret;
> }
>
> static void uds_try_format(struct vsp1_uds *uds,
> @@ -202,10 +209,15 @@ static int uds_set_format(struct v4l2_subdev *subdev,
> struct vsp1_uds *uds = to_uds(subdev);
> struct v4l2_subdev_pad_config *config;
> struct v4l2_mbus_framefmt *format;
> + int ret = 0;
> +
> + mutex_lock(&uds->entity.lock);
>
> config = vsp1_entity_get_pad_config(&uds->entity, cfg, fmt->which);
> - if (!config)
> - return -EINVAL;
> + if (!config) {
> + ret = -EINVAL;
> + goto done;
> + }
>
> uds_try_format(uds, config, fmt->pad, &fmt->format);
>
> @@ -221,7 +233,9 @@ static int uds_set_format(struct v4l2_subdev *subdev,
> uds_try_format(uds, config, UDS_PAD_SOURCE, format);
> }
>
> - return 0;
> +done:
> + mutex_unlock(&uds->entity.lock);
> + return ret;
> }
>
> /* -----------------------------------------------------------------------------
> --
> Regards,
>
> Laurent Pinchart
>
--
Regards,
Niklas Söderlund
