| From | Bartlomiej Zolnierkiewicz <> | Subject | [PATCH 01/20] async_tx: add missing DMA unmap to async_memcpy() | Date | Mon, 05 Nov 2012 11:00:12 +0100 |
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Do DMA unmap on ->device_prep_dma_memcpy failure.
Cc: Dan Williams <djbw@fb.com> Cc: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> --- crypto/async_tx/async_memcpy.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/crypto/async_tx/async_memcpy.c b/crypto/async_tx/async_memcpy.c index 361b5e8..9e62fef 100644 --- a/crypto/async_tx/async_memcpy.c +++ b/crypto/async_tx/async_memcpy.c @@ -67,6 +67,12 @@ async_memcpy(struct page *dest, struct page *src, unsigned int dest_offset, tx = device->device_prep_dma_memcpy(chan, dma_dest, dma_src, len, dma_prep_flags); + if (!tx) { + dma_unmap_page(device->dev, dma_dest, len, + DMA_FROM_DEVICE); + dma_unmap_page(device->dev, dma_src, len, + DMA_TO_DEVICE); + } } if (tx) { -- 1.8.0
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