[GIT PULL] two patches: pipeline validation error code

[Helen Koike <helen.koike@collabora.co.uk>]

Hi Mauro,

Please pull the following patches correcting the returned error codes 
and respective docs in the pipeline validation.

Regards,
Helen

The following changes since commit 45c175c4ae9695d6d2f30a45ab7f3866cfac184b:

   [media] tw686x: avoid going past array (2016-04-26 06:38:53 -0300)

are available in the git repository at:

   https://github.com/helen-fornazier/opw-staging.git media/devel

for you to fetch changes up to 957f69645eae5faae6daa205e85471ef82752abc:

   [media] DocBook: update error code in videoc-streamon (2016-04-27 
14:14:11 -0300)

----------------------------------------------------------------
Helen Mae Koike Fornazier (2):
       [media] media: change pipeline validation return error
       [media] DocBook: update error code in videoc-streamon

  Documentation/DocBook/media/v4l/vidioc-streamon.xml | 8 ++++++++
  drivers/media/media-entity.c                        | 2 +-
  drivers/media/v4l2-core/v4l2-subdev.c               | 4 ++--
  3 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/Documentation/DocBook/media/v4l/vidioc-streamon.xml 
b/Documentation/DocBook/media/v4l/vidioc-streamon.xml
index df2c63d..89fd7ce 100644
--- a/Documentation/DocBook/media/v4l/vidioc-streamon.xml
+++ b/Documentation/DocBook/media/v4l/vidioc-streamon.xml
@@ -123,6 +123,14 @@ synchronize with other events.</para>
        </para>
      </listitem>
        </varlistentry>
+      <varlistentry>
+  <term><errorcode>ENOLINK</errorcode></term>
+    <listitem>
+      <para>The driver implements Media Controller interface and
+      the pipeline link configuration is invalid.
+      </para>
+    </listitem>
+      </varlistentry>
      </variablelist>
    </refsect1>
  </refentry>
diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c
index c53c1d5..d8a2299 100644
--- a/drivers/media/media-entity.c
+++ b/drivers/media/media-entity.c
@@ -445,7 +445,7 @@ __must_check int 
__media_entity_pipeline_start(struct media_entity *entity,
          bitmap_or(active, active, has_no_links, entity->num_pads);

          if (!bitmap_full(active, entity->num_pads)) {
-            ret = -EPIPE;
+            ret = -ENOLINK;
              dev_dbg(entity->graph_obj.mdev->dev,
                  "\"%s\":%u must be connected by an enabled link\n",
                  entity->name,
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c 
b/drivers/media/v4l2-core/v4l2-subdev.c
index 224ea60..953eab0 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -510,7 +510,7 @@ int v4l2_subdev_link_validate_default(struct 
v4l2_subdev *sd,
      if (source_fmt->format.width != sink_fmt->format.width
          || source_fmt->format.height != sink_fmt->format.height
          || source_fmt->format.code != sink_fmt->format.code)
-        return -EINVAL;
+        return -EPIPE;

      /* The field order must match, or the sink field order must be NONE
       * to support interlaced hardware connected to bridges that support
@@ -518,7 +518,7 @@ int v4l2_subdev_link_validate_default(struct 
v4l2_subdev *sd,
       */
      if (source_fmt->format.field != sink_fmt->format.field &&
          sink_fmt->format.field != V4L2_FIELD_NONE)
-        return -EINVAL;
+        return -EPIPE;

      return 0;
  }