From: Sakari Ailus Date: Fri, 13 Feb 2015 07:42:37 +0000 (-0300) Subject: [media] vb2: Fix dma_dir setting for dma-contig mem type X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=4879785ed511083676f27a016c9ad6c46c8e5737;p=deliverable%2Flinux.git [media] vb2: Fix dma_dir setting for dma-contig mem type The last argument of vb2_dc_get_user_pages() is of type enum dma_data_direction, but the caller, vb2_dc_get_userptr() passes a value which is the result of comparison dma_dir == DMA_FROM_DEVICE. This results in the write parameter to get_user_pages() being zero in all cases, i.e. that the caller has no intent to write there. This was broken by patch "vb2: replace 'write' by 'dma_dir'". Signed-off-by: Sakari Ailus Cc: stable@vger.kernel.org # for v3.19 Acked-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/v4l2-core/videobuf2-dma-contig.c b/drivers/media/v4l2-core/videobuf2-dma-contig.c index b481d20c8372..69e0483adfee 100644 --- a/drivers/media/v4l2-core/videobuf2-dma-contig.c +++ b/drivers/media/v4l2-core/videobuf2-dma-contig.c @@ -632,8 +632,7 @@ static void *vb2_dc_get_userptr(void *alloc_ctx, unsigned long vaddr, } /* extract page list from userspace mapping */ - ret = vb2_dc_get_user_pages(start, pages, n_pages, vma, - dma_dir == DMA_FROM_DEVICE); + ret = vb2_dc_get_user_pages(start, pages, n_pages, vma, dma_dir); if (ret) { unsigned long pfn; if (vb2_dc_get_user_pfn(start, n_pages, vma, &pfn) == 0) {