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| author | Rusty Russell <rusty@rustcorp.com.au> | 2008-12-30 08:02:35 +1030 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2008-12-30 08:02:35 +1030 |
| commit | 33edcf133ba93ecba2e4b6472e97b689895d805c (patch) | |
| tree | 327d7a20acef64005e7c5ccbfa1265be28aeb6ac /crypto/async_tx | |
| parent | be4d638c1597580ed2294d899d9f1a2cd10e462c (diff) | |
| parent | 3c92ec8ae91ecf59d88c798301833d7cf83f2179 (diff) | |
| download | linux-33edcf133ba93ecba2e4b6472e97b689895d805c.tar.bz2 | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'crypto/async_tx')
| -rw-r--r-- | crypto/async_tx/async_xor.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/crypto/async_tx/async_xor.c b/crypto/async_tx/async_xor.c index c029d3eb9ef0..595b78672b36 100644 --- a/crypto/async_tx/async_xor.c +++ b/crypto/async_tx/async_xor.c @@ -53,10 +53,17 @@ do_async_xor(struct dma_chan *chan, struct page *dest, struct page **src_list, int xor_src_cnt; dma_addr_t dma_dest; - dma_dest = dma_map_page(dma->dev, dest, offset, len, DMA_FROM_DEVICE); - for (i = 0; i < src_cnt; i++) + /* map the dest bidrectional in case it is re-used as a source */ + dma_dest = dma_map_page(dma->dev, dest, offset, len, DMA_BIDIRECTIONAL); + for (i = 0; i < src_cnt; i++) { + /* only map the dest once */ + if (unlikely(src_list[i] == dest)) { + dma_src[i] = dma_dest; + continue; + } dma_src[i] = dma_map_page(dma->dev, src_list[i], offset, len, DMA_TO_DEVICE); + } while (src_cnt) { async_flags = flags; |