[PATCH resend 1/7] async_tx: add missing DMA unmap to async_memcpy()

From: Bartlomiej Zolnierkiewicz
Date: Wed Dec 05 2012 - 06:11:14 EST


Do DMA unmap on ->device_prep_dma_memcpy failure.

Acked-by: Dan Williams <djbw@xxxxxx>
Reviewed-by: Tomasz Figa <t.figa@xxxxxxxxxxx>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
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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