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dmaengine: mv_xor_v2: move unmap to before callback

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Completion callback should happen after dma_descriptor_unmap() has
happened. This allow the cache invalidate to happen and ensure that
the data accessed by the upper layer is in memory that was from DMA
rather than stale data. On some architecture this is done by the
hardware, however we should make the code consistent to not cause
confusion.

Signed-off-by: Hanna Hawa <hannah@marvell.com>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Hanna Hawa 2018-07-17 13:30:02 +03:00 committed by Vinod Koul
parent 5a80aff92a
commit c3a272c7b0
1 changed files with 1 additions and 2 deletions
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3
drivers/dma/mv_xor_v2.c
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@ -589,10 +589,9 @@ static void mv_xor_v2_tasklet(unsigned long data)
*/
dma_cookie_complete(&next_pending_sw_desc->async_tx);
dma_descriptor_unmap(&next_pending_sw_desc->async_tx);
dmaengine_desc_get_callback_invoke(
&next_pending_sw_desc->async_tx, NULL);
dma_descriptor_unmap(&next_pending_sw_desc->async_tx);
}
dma_run_dependencies(&next_pending_sw_desc->async_tx);