[media] staging: media: omap4iss: video: Don't WARN() on unknown pixel formats

When mapping from a V4L2 pixel format to a media bus format in the
VIDIOC_TRY_FMT and VIDIOC_S_FMT handlers, the requested format may be
unsupported by the driver. Return a hardcoded default format instead of
WARN()ing in that case.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

diff --git a/drivers/staging/media/omap4iss/iss_video.c b/drivers/staging/media/omap4iss/iss_video.c
index 6955044..e949b6f 100644 (file)
--- a/drivers/staging/media/omap4iss/iss_video.c
+++ b/drivers/staging/media/omap4iss/iss_video.c
@@ -171,14 +171,14 @@ static void iss_video_pix_to_mbus(const struct v4l2_pix_format *pix,
        mbus->width = pix->width;
        mbus->height = pix->height;
 
-       for (i = 0; i < ARRAY_SIZE(formats); ++i) {
+       /* Skip the last format in the loop so that it will be selected if no
+        * match is found.
+        */
+       for (i = 0; i < ARRAY_SIZE(formats) - 1; ++i) {
                if (formats[i].pixelformat == pix->pixelformat)
                        break;
        }
 
-       if (WARN_ON(i == ARRAY_SIZE(formats)))
-               return;
-
        mbus->code = formats[i].code;
        mbus->colorspace = pix->colorspace;
        mbus->field = pix->field;