[media] vb2: add dma_dir to the alloc memop

This is needed for the next patch where the dma-sg alloc memop needs
to know the dma_dir.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Pawel Osciak <pawel@osciak.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
diff --git a/drivers/media/v4l2-core/videobuf2-dma-sg.c b/drivers/media/v4l2-core/videobuf2-dma-sg.c
index 6b54a14..2529b83 100644
--- a/drivers/media/v4l2-core/videobuf2-dma-sg.c
+++ b/drivers/media/v4l2-core/videobuf2-dma-sg.c
@@ -86,7 +86,8 @@
 	return 0;
 }
 
-static void *vb2_dma_sg_alloc(void *alloc_ctx, unsigned long size, gfp_t gfp_flags)
+static void *vb2_dma_sg_alloc(void *alloc_ctx, unsigned long size,
+			      enum dma_data_direction dma_dir, gfp_t gfp_flags)
 {
 	struct vb2_dma_sg_buf *buf;
 	int ret;
@@ -97,7 +98,7 @@
 		return NULL;
 
 	buf->vaddr = NULL;
-	buf->dma_dir = DMA_NONE;
+	buf->dma_dir = dma_dir;
 	buf->offset = 0;
 	buf->size = size;
 	/* size is already page aligned */