linux-kernel - [PATCH] dmaengine: care sd_dma_address/len in dmaengine_prep_slave

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Date:	Mon, 30 Jan 2012 01:25:58 -0800 (PST)
From:	Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
To:	Vinod Koul <vinod.koul@...el.com>,
	Dan Williams <dan.j.williams@...el.com>,
	Russell King <linux@....linux.org.uk>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] dmaengine: care sd_dma_address/len in dmaengine_prep_slave_single()

dmaengine_prep_slave_single() is helper macro of dmaengine.
But it doesn't have sg_dma_address/len() settings which are required.
And it used void *buf in parameter, but it should be dma_addr_t.
This patch fixes up it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
---
 include/linux/dmaengine.h |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 75f53f8..f47c578 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -521,11 +521,16 @@ static inline int dmaengine_slave_config(struct dma_chan *chan,
 }
 
 static inline struct dma_async_tx_descriptor *dmaengine_prep_slave_single(
-	struct dma_chan *chan, void *buf, size_t len,
+	struct dma_chan *chan, dma_addr_t buf, size_t len,
 	enum dma_data_direction dir, unsigned long flags)
 {
 	struct scatterlist sg;
-	sg_init_one(&sg, buf, len);
+
+	sg_init_table(&sg, 1);
+	sg_set_page(&sg, pfn_to_page(PFN_DOWN(buf)),
+		    len, offset_in_page(buf));
+	sg_dma_address(&sg) = buf;
+	sg_dma_len(&sg) = len;
 
 	return chan->device->device_prep_slave_sg(chan, &sg, 1, dir, flags);
 }
-- 
1.7.5.4

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