[PATCHv10 23/26] v4l: vb2-dma-contig: align buffer size to PAGE_SIZE

[Tomasz Stanislawski]

Most operations on DMA and DMABUF framework need page
aligned buffers. This fix guarantees this requirement
for vb2-dma-contig buffers.

Signed-off-by: Tomasz Stanislawski <t.stanislaws at samsung.com>
---
 drivers/media/v4l2-core/videobuf2-dma-contig.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/media/v4l2-core/videobuf2-dma-contig.c b/drivers/media/v4l2-core/videobuf2-dma-contig.c
index 571a919..002ee50 100644
--- a/drivers/media/v4l2-core/videobuf2-dma-contig.c
+++ b/drivers/media/v4l2-core/videobuf2-dma-contig.c
@@ -162,6 +162,9 @@ static void *vb2_dc_alloc(void *alloc_ctx, unsigned long size)
 	if (!buf)
 		return ERR_PTR(-ENOMEM);
 
+	/* align image size to PAGE_SIZE */
+	size = PAGE_ALIGN(size);
+
 	buf->vaddr = dma_alloc_coherent(dev, size, &buf->dma_addr, GFP_KERNEL);
 	if (!buf->vaddr) {
 		dev_err(dev, "dma_alloc_coherent of size %ld failed\n", size);
-- 
1.7.9.5