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Unverified Commit 42c2d4bf authored by Tiffany Lin's avatar Tiffany Lin Committed by Harsh Shandilya
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media: vb2 dma-contig: Fully cache synchronise buffers in prepare and finish



commit d9a985883fa32453d099d6293188c11d75cef1fa upstream.

In videobuf2 dma-contig memory type the prepare and finish ops, instead of
passing the number of entries in the original scatterlist as the "nents"
parameter to dma_sync_sg_for_device() and dma_sync_sg_for_cpu(), the value
returned by dma_map_sg() was used. Albeit this has been suggested in
comments of some implementations (which have since been corrected), this
is wrong.

Fixes: 199d101e ("v4l: vb2-dma-contig: add prepare/finish to dma-contig allocator")

Signed-off-by: default avatarTiffany Lin <tiffany.lin@mediatek.com>
Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 7b241eb3
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