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[media] vb2: Fix dma_dir setting for dma-contig mem type

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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>
This commit is contained in:
Sakari Ailus 2015-02-13 04:42:37 -03:00 committed by Mauro Carvalho Chehab
parent a0f10c131c
commit 4879785ed5
1 changed files with 1 additions and 2 deletions
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3
drivers/media/v4l2-core/videobuf2-dma-contig.c
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@ -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) {