From a812a9665d7d89257f8203dba504a33faa59c45b Mon Sep 17 00:00:00 2001 From: Tomasz Stanislawski Date: Tue, 9 Oct 2012 14:07:41 -0300 Subject: [PATCH] [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 Signed-off-by: Mauro Carvalho Chehab --- 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 27de1bb731d..10beaee7f0a 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); -- 2.46.0