[media] em28xx-v4l: fix video buffer field order reporting in progressive mode

commit 662c97cf upstream.

The correct field order in progressive mode is V4L2_FIELD_NONE, not V4L2_FIELD_INTERLACED.
Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
[ kamal: backport to 3.13-stable: context ]
Signed-off-by: Kamal Mostafa <kamal@canonical.com>

drivers/media/usb/em28xx/em28xx-video.c

@@ -148,7 +148,10 @@ static inline void finish_buffer(struct em28xx *dev,
 	em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field);
 
 	buf->vb.v4l2_buf.sequence = dev->field_count++;
-	buf->vb.v4l2_buf.field = V4L2_FIELD_INTERLACED;
+	if (dev->progressive)
+		buf->vb.v4l2_buf.field = V4L2_FIELD_NONE;
+	else
+		buf->vb.v4l2_buf.field = V4L2_FIELD_INTERLACED;
 	v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp);
 
 	vb2_buffer_done(&buf->vb, VB2_BUF_STATE_DONE);