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[media] media: imx: Drop warning upon multiple S_STREAM disable calls

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Calling S_STREAM OFF multiple times on a video device is valid, although
dubious, practice. Instead of warning about it and setting stream count
lower than zero, just ignore the subsequent S_STREAM calls and correct
the stream count to zero.

Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Marek Vasut 2017-06-07 15:34:12 -03:00 committed by Mauro Carvalho Chehab
parent 21e54111d2
commit de2e04569d
5 changed files with 10 additions and 5 deletions
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3
drivers/staging/media/imx/imx-ic-prp.c
View File

@ -391,7 +391,8 @@ static int prp_s_stream(struct v4l2_subdev *sd, int enable)
update_count:
priv->stream_count += enable ? 1 : -1;
WARN_ON(priv->stream_count < 0);
if (priv->stream_count < 0)
priv->stream_count = 0;
out:
mutex_unlock(&priv->lock);
return ret;

3
drivers/staging/media/imx/imx-ic-prpencvf.c
View File

@ -1140,7 +1140,8 @@ static int prp_s_stream(struct v4l2_subdev *sd, int enable)
update_count:
priv->stream_count += enable ? 1 : -1;
WARN_ON(priv->stream_count < 0);
if (priv->stream_count < 0)
priv->stream_count = 0;
out:
mutex_unlock(&priv->lock);
return ret;

3
drivers/staging/media/imx/imx-media-csi.c
View File

@ -864,7 +864,8 @@ static int csi_s_stream(struct v4l2_subdev *sd, int enable)
update_count:
priv->stream_count += enable ? 1 : -1;
WARN_ON(priv->stream_count < 0);
if (priv->stream_count < 0)
priv->stream_count = 0;
out:
mutex_unlock(&priv->lock);
return ret;

3
drivers/staging/media/imx/imx-media-vdic.c
View File

@ -536,7 +536,8 @@ static int vdic_s_stream(struct v4l2_subdev *sd, int enable)
update_count:
priv->stream_count += enable ? 1 : -1;
WARN_ON(priv->stream_count < 0);
if (priv->stream_count < 0)
priv->stream_count = 0;
out:
mutex_unlock(&priv->lock);
return ret;

3
drivers/staging/media/imx/imx6-mipi-csi2.c
View File

@ -397,7 +397,8 @@ static int csi2_s_stream(struct v4l2_subdev *sd, int enable)
update_count:
csi2->stream_count += enable ? 1 : -1;
WARN_ON(csi2->stream_count < 0);
if (csi2->stream_count < 0)
csi2->stream_count = 0;
out:
mutex_unlock(&csi2->lock);
return ret;