V4L/DVB (6265): Prevent for calling mmap_free without an allocated buffer



Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
http://thread.gmane.org/gmane.comp.video.video4linux/34978/focus=34981


Reviewed-by: Ricardo Cerqueira <v4l@cerqueira.org>

parent 3bef5e4a

drivers/media/video/videobuf-core.c

+3 −0

Original line number	Original line	Diff line number	Diff line
	@@ -880,6 +880,9 @@ int videobuf_mmap_free(struct videobuf_queue *q)
	int i;		int i;
	int rc;		int rc;

			if (!q)
			return 0;

	MAGIC_CHECK(q->int_ops->magic,MAGIC_QTYPE_OPS);		MAGIC_CHECK(q->int_ops->magic,MAGIC_QTYPE_OPS);

	rc = CALL(q,mmap_free,q);		rc = CALL(q,mmap_free,q);