3.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mauro Carvalho Chehab <mchehab+sams...@kernel.org>

commit f823ce2a1202d47110a7ef86b65839f0be8adc38 upstream.

Follow the V4L2 spec, as warned by v4l2-compliance:

        warn: v4l2-test-formats.cpp(732): TRY_FMT cannot handle an invalid 
pixelformat.
        warn: v4l2-test-formats.cpp(733): This may or may not be a problem. For 
more information see:

warn: v4l2-test-formats.cpp(734): 
http://www.mail-archive.com/linux-media@vger.kernel.org/msg56550.html

Cc: sta...@vger.kernel.org
Fixes: bddcf63313c6 ("V4L/DVB (9927): em28xx: use a more standard way to 
specify video formats")
Signed-off-by: Mauro Carvalho Chehab <mchehab+sams...@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/media/usb/em28xx/em28xx-video.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/media/usb/em28xx/em28xx-video.c
+++ b/drivers/media/usb/em28xx/em28xx-video.c
@@ -1280,9 +1280,9 @@ static int vidioc_try_fmt_vid_cap(struct
 
        fmt = format_by_fourcc(f->fmt.pix.pixelformat);
        if (!fmt) {
-               em28xx_videodbg("Fourcc format (%08x) invalid.\n",
-                               f->fmt.pix.pixelformat);
-               return -EINVAL;
+               fmt = &format[0];
+               em28xx_videodbg("Fourcc format (%08x) invalid. Using default 
(%08x).\n",
+                               f->fmt.pix.pixelformat, fmt->fourcc);
        }
 
        if (dev->board.is_em2800) {


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