linux-kernel - [PATCH] dmaengine: imx-dma: fix missing unlock on error in imxdma_xfer

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Date:	Sun, 21 Oct 2012 19:58:30 +0800
From:	Wei Yongjun <weiyj.lk@...il.com>
To:	djbw@...com, vinod.koul@...el.com
Cc:	yongjun_wei@...ndmicro.com.cn, linux-kernel@...r.kernel.org
Subject: [PATCH] dmaengine: imx-dma: fix missing unlock on error in imxdma_xfer_desc()

From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>

Add the missing unlock on the error handling path in function
imxdma_xfer_desc().

Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
---
 drivers/dma/imx-dma.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c
index f11b5b2..7d9554c 100644
--- a/drivers/dma/imx-dma.c
+++ b/drivers/dma/imx-dma.c
@@ -474,8 +474,10 @@ static int imxdma_xfer_desc(struct imxdma_desc *d)
 			slot = i;
 			break;
 		}
-		if (slot < 0)
+		if (slot < 0) {
+			spin_unlock_irqrestore(&imxdma->lock, flags);
 			return -EBUSY;
+		}
 
 		imxdma->slots_2d[slot].xsr = d->x;
 		imxdma->slots_2d[slot].ysr = d->y;


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