linux-kernel - [PATCH 2/2] usb: musb: Fix DMA desired mode for Mentor DMA engine

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Date:	Mon, 1 Feb 2016 17:37:46 -0700
From:	Joshua Henderson <joshua.henderson@...rochip.com>
To:	<linux-kernel@...r.kernel.org>
CC:	Cristian Birsan <cristian.birsan@...rochip.com>,
	Joshua Henderson <joshua.henderson@...rochip.com>,
	Felipe Balbi <balbi@...com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	<linux-usb@...r.kernel.org>
Subject: [PATCH 2/2] usb: musb: Fix DMA desired mode for Mentor DMA engine

From: Cristian Birsan <cristian.birsan@...rochip.com>

Commit 6b6e97107f12f3a9f7 (USB: musb: fix isochronous TXDMA (take 2)) introduces
a problem setting the desired channel mode for the Mentor DMA engine.

There is a case where the pointer of the channel DMA mode is incorrectly
assigned to a pointer value, when it should be assigned the actual mode value.
This results in the value of channel->desired_mode not being correct.

Signed-off-by: Cristian Birsan <cristian.birsan@...rochip.com>
Signed-off-by: Joshua Henderson <joshua.henderson@...rochip.com>
---
 drivers/usb/musb/musb_host.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index 3fdc99b..748379e 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -662,7 +662,7 @@ static int musb_tx_dma_set_mode_mentor(struct dma_controller *dma,
 		csr &= ~(MUSB_TXCSR_AUTOSET | MUSB_TXCSR_DMAMODE);
 		csr |= MUSB_TXCSR_DMAENAB; /* against programmer's guide */
 	}
-	channel->desired_mode = mode;
+	channel->desired_mode = *mode;
 	musb_writew(epio, MUSB_TXCSR, csr);
 
 	return 0;
-- 
1.7.9.5