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| author | Sakari Ailus <sakari.ailus@linux.intel.com> | 2015-02-13 04:42:37 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-04-02 08:56:26 -0300 |
| commit | 4879785ed511083676f27a016c9ad6c46c8e5737 (patch) | |
| tree | 950fd9fa766afab16964445b613959b6be4413cd /drivers/media | |
| parent | a0f10c131cc49d7d84394beb7903e1f246331224 (diff) | |
| download | linux-stable-4879785ed511083676f27a016c9ad6c46c8e5737.tar.gz linux-stable-4879785ed511083676f27a016c9ad6c46c8e5737.tar.bz2 linux-stable-4879785ed511083676f27a016c9ad6c46c8e5737.zip | |
[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 <sakari.ailus@linux.intel.com>
Cc: stable@vger.kernel.org # for v3.19
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/v4l2-core/videobuf2-dma-contig.c | 3 |
1 files changed, 1 insertions, 2 deletions
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) { |