From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sakari Ailus , Hans Verkuil , Mauro Carvalho Chehab Subject: [PATCH 3.19 092/101] [media] vb2: Fix dma_dir setting for dma-contig mem type Date: Fri, 17 Apr 2015 15:29:20 +0200 Message-Id: <20150417132518.331244303@linuxfoundation.org> In-Reply-To: <20150417132514.379828774@linuxfoundation.org> References: <20150417132514.379828774@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Sakari Ailus commit 4879785ed511083676f27a016c9ad6c46c8e5737 upstream. 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 Acked-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Greg Kroah-Hartman --- drivers/media/v4l2-core/videobuf2-dma-contig.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) --- 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 *al } /* 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) {