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authorTomasz Stanislawski <t.stanislaws@samsung.com>2012-10-09 21:07:41 +0400
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-11-25 23:21:37 +0400
commita812a9665d7d89257f8203dba504a33faa59c45b (patch)
tree8af3b0a576ced5dad93f7ea50d889e5c9e378588 /drivers/media
parentd81e870d5afa1b0a95ea94c4052d3c7e973fae8c (diff)
downloadlinux-a812a9665d7d89257f8203dba504a33faa59c45b.tar.xz
[media] v4l: vb2-dma-contig: align buffer size to PAGE_SIZE
Most operations on DMA and DMABUF framework require the size of a buffer to be page aligned. This patch guarantees the requirement is satisfied for all vb2-dma-contig buffers. Signed-off-by: Tomasz Stanislawski <t.stanislaws@samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/v4l2-core/videobuf2-dma-contig.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/videobuf2-dma-contig.c b/drivers/media/v4l2-core/videobuf2-dma-contig.c
index 27de1bb731db..10beaee7f0ae 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);