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

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>

diff --git a/drivers/staging/media/imx/imx-ic-prp.c b/drivers/staging/media/imx/imx-ic-prp.c
index 783a515..c2bb5ef 100644 (file)
--- a/drivers/staging/media/imx/imx-ic-prp.c
+++ b/drivers/staging/media/imx/imx-ic-prp.c
@@ -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;

diff --git a/drivers/staging/media/imx/imx-ic-prpencvf.c b/drivers/staging/media/imx/imx-ic-prpencvf.c
index 5e9c817..ed363fe 100644 (file)
--- a/drivers/staging/media/imx/imx-ic-prpencvf.c
+++ b/drivers/staging/media/imx/imx-ic-prpencvf.c
@@ -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;

diff --git a/drivers/staging/media/imx/imx-media-csi.c b/drivers/staging/media/imx/imx-media-csi.c
index 6eaf644..a2d2669 100644 (file)
--- a/drivers/staging/media/imx/imx-media-csi.c
+++ b/drivers/staging/media/imx/imx-media-csi.c
@@ -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;

diff --git a/drivers/staging/media/imx/imx-media-vdic.c b/drivers/staging/media/imx/imx-media-vdic.c
index c0b6d7f..7eabdc4 100644 (file)
--- a/drivers/staging/media/imx/imx-media-vdic.c
+++ b/drivers/staging/media/imx/imx-media-vdic.c
@@ -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;

diff --git a/drivers/staging/media/imx/imx6-mipi-csi2.c b/drivers/staging/media/imx/imx6-mipi-csi2.c
index cae1cb2..5061f3f 100644 (file)
--- a/drivers/staging/media/imx/imx6-mipi-csi2.c
+++ b/drivers/staging/media/imx/imx6-mipi-csi2.c
@@ -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;