linux-kernel - [PATCH] usb: musb: ux500: set dma config for both src and dst

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Date:	Tue, 2 Aug 2011 17:33:39 +0200
From:	Per Forlin <per.forlin@...ricsson.com>
To:	Felipe Balbi <balbi@...com>,
	Mian Yousaf KAUKAB <mian.yousaf.kaukab@...ricsson.com>,
	Greg Kroah-Hartman <gregkh@...e.de>
Cc:	<linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linaro-dev@...ts.linaro.org>, <users@...oocommunity.org>,
	Per Forlin <per.forlin@...aro.org>
Subject: [PATCH] usb: musb: ux500: set dma config for both src and dst

From: Per Forlin <per.forlin@...aro.org>

The dma driver requires both src and dst to be set.
This fix is needed in order to run gadget mass storage.
Patch is verified on snowball.

Signed-off-by: Per Forlin <per.forlin@...aro.org>
---
 drivers/usb/musb/ux500_dma.c |   16 +++++++---------
 1 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/drivers/usb/musb/ux500_dma.c b/drivers/usb/musb/ux500_dma.c
index cecace4..2313475 100644
--- a/drivers/usb/musb/ux500_dma.c
+++ b/drivers/usb/musb/ux500_dma.c
@@ -133,15 +133,13 @@ static bool ux500_configure_channel(struct dma_channel *channel,
 					DMA_SLAVE_BUSWIDTH_4_BYTES;
 
 	slave_conf.direction = direction;
-	if (direction == DMA_FROM_DEVICE) {
-		slave_conf.src_addr = usb_fifo_addr;
-		slave_conf.src_addr_width = addr_width;
-		slave_conf.src_maxburst = 16;
-	} else {
-		slave_conf.dst_addr = usb_fifo_addr;
-		slave_conf.dst_addr_width = addr_width;
-		slave_conf.dst_maxburst = 16;
-	}
+	slave_conf.src_addr = usb_fifo_addr;
+	slave_conf.src_addr_width = addr_width;
+	slave_conf.src_maxburst = 16;
+	slave_conf.dst_addr = usb_fifo_addr;
+	slave_conf.dst_addr_width = addr_width;
+	slave_conf.dst_maxburst = 16;
+
 	dma_chan->device->device_control(dma_chan, DMA_SLAVE_CONFIG,
 					     (unsigned long) &slave_conf);
 
-- 
1.6.3.3

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