linux-kernel - [PATCH 10/20] async_tx: add missing DMA unmap to async

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Date:	Mon, 05 Nov 2012 11:00:21 +0100
From:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:	linux-kernel@...r.kernel.org
Cc:	djbw@...com, dwmw2@...radead.org, hskinnemoen@...il.com,
	iws@...o.caltech.edu, vinod.koul@...el.com, vipin.kumar@...com,
	t.figa@...sung.com, kyungmin.park@...sung.com,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Subject: [PATCH 10/20] async_tx: add missing DMA unmap to async_memset()

Do DMA unmap on ->device_prep_dma_memset failure.

Cc: Dan Williams <djbw@...com>
Cc: Tomasz Figa <t.figa@...sung.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>
---
 crypto/async_tx/async_memset.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/crypto/async_tx/async_memset.c b/crypto/async_tx/async_memset.c
index 05a4d1e..a6a667b 100644
--- a/crypto/async_tx/async_memset.c
+++ b/crypto/async_tx/async_memset.c
@@ -61,6 +61,9 @@ async_memset(struct page *dest, int val, unsigned int offset, size_t len,
 
 		tx = device->device_prep_dma_memset(chan, dma_dest, val, len,
 						    dma_prep_flags);
+		if (!tx)
+			dma_unmap_page(device->dev, dma_dest, len,
+				       DMA_FROM_DEVICE);
 	}
 
 	if (tx) {
-- 
1.8.0

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