[3.13.y.z extended stable] Patch "dmaengine: fix xor sources continuation" has been added to staging queue

Kamal Mostafa kamal at canonical.com
Tue Oct 21 20:09:08 UTC 2014

This is a note to let you know that I have just added a patch titled

    dmaengine: fix xor sources continuation

to the linux-3.13.y-queue branch of the 3.13.y.z extended stable tree 
which can be found at:


This patch is scheduled to be released in version

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.13.y.z tree, see



>From b157dd06fab645785119161cad08a6c193763124 Mon Sep 17 00:00:00 2001
From: Xuelin Shi <xuelin.shi at freescale.com>
Date: Tue, 1 Jul 2014 16:32:38 +0800
Subject: dmaengine: fix xor sources continuation

commit 87cea76384257e6ac3fa4791b6a6b9d0335f7457 upstream.

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

Signed-off-by: Xuelin Shi <xuelin.shi at freescale.com>
Signed-off-by: Dan Williams <dan.j.williams at intel.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
 crypto/async_tx/async_xor.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/crypto/async_tx/async_xor.c b/crypto/async_tx/async_xor.c
index 3c562f5..e1bce26 100644
--- 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, struct dmaengine_unmap_data *unmap,
 		tx = dma->device_prep_dma_xor(chan, dma_dest, src_list,
 					      xor_src_cnt, unmap->len,
-		src_list[0] = tmp;

 		if (unlikely(!tx))
@@ -92,6 +90,7 @@ do_async_xor(struct dma_chan *chan, struct dmaengine_unmap_data *unmap,
 						      xor_src_cnt, unmap->len,
+		src_list[0] = tmp;

 		dma_set_unmap(tx, unmap);
 		async_tx_submit(chan, tx, submit);

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