linux-kernel - [PATCH 3.17 039/146] dmaengine: fix xor sources continuation

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Message-Id: <20141028033345.109923185@linuxfoundation.org>
Date:	Tue, 28 Oct 2014 11:33:01 +0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Xuelin Shi <xuelin.shi@...escale.com>,
	Dan Williams <dan.j.williams@...el.com>
Subject: [PATCH 3.17 039/146] dmaengine: fix xor sources continuation

3.17-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Xuelin Shi <xuelin.shi@...escale.com>

commit 87cea76384257e6ac3fa4791b6a6b9d0335f7457 upstream.

the partial xor result must be kept until the next
tx is generated.

Signed-off-by: Xuelin Shi <xuelin.shi@...escale.com>
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 crypto/async_tx/async_xor.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/crypto/async_tx/async_xor.c
+++ b/crypto/async_tx/async_xor.c
@@ -78,8 +78,6 @@ do_async_xor(struct dma_chan *chan, stru
 		tx = dma->device_prep_dma_xor(chan, dma_dest, src_list,
 					      xor_src_cnt, unmap->len,
 					      dma_flags);
-		src_list[0] = tmp;
-
 
 		if (unlikely(!tx))
 			async_tx_quiesce(&submit->depend_tx);
@@ -92,6 +90,7 @@ do_async_xor(struct dma_chan *chan, stru
 						      xor_src_cnt, unmap->len,
 						      dma_flags);
 		}
+		src_list[0] = tmp;
 
 		dma_set_unmap(tx, unmap);
 		async_tx_submit(chan, tx, submit);


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