linux-kernel - [PATCH 5/7] dw_dmac: adding support for 64 bit access width for memcpy xfers

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Date:	Thu, 17 Feb 2011 12:54:55 +0530
From:	Viresh Kumar <viresh.kumar@...com>
To:	<dan.j.williams@...el.com>, <linux-kernel@...r.kernel.org>
Cc:	<shiraz.hashim@...com>, <amit.goel@...com>,
	<armando.visconti@...com>, Viresh KUMAR <viresh.kumar@...com>
Subject: [PATCH 5/7] dw_dmac: adding support for 64 bit access width for memcpy xfers

From: Viresh KUMAR <viresh.kumar@...com>

Signed-off-by: Viresh Kumar <viresh.kumar@...com>
---
 drivers/dma/dw_dmac.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
index 5cc5abf..c40b89f 100644
--- a/drivers/dma/dw_dmac.c
+++ b/drivers/dma/dw_dmac.c
@@ -577,7 +577,9 @@ dwc_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
 	 * We can be a lot more clever here, but this should take care
 	 * of the most common optimization.
 	 */
-	if (!((src | dest  | len) & 3))
+	if (!((src | dest  | len) & 7))
+		src_width = dst_width = 3;
+	else if (!((src | dest  | len) & 3))
 		src_width = dst_width = 2;
 	else if (!((src | dest | len) & 1))
 		src_width = dst_width = 1;
-- 
1.7.2.2

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