[media] drivers/media: Use vzalloc

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/videobuf-dma-sg.c b/drivers/media/video/videobuf-dma-sg.c
index 20f227e..ab684e8 100644
--- a/drivers/media/video/videobuf-dma-sg.c
+++ b/drivers/media/video/videobuf-dma-sg.c
@@ -69,10 +69,9 @@
 	struct page *pg;
 	int i;
 
-	sglist = vmalloc(nr_pages * sizeof(*sglist));
+	sglist = vzalloc(nr_pages * sizeof(*sglist));
 	if (NULL == sglist)
 		return NULL;
-	memset(sglist, 0, nr_pages * sizeof(*sglist));
 	sg_init_table(sglist, nr_pages);
 	for (i = 0; i < nr_pages; i++, virt += PAGE_SIZE) {
 		pg = vmalloc_to_page(virt);