From: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Date: Sun, 21 Oct 2012 11:58:30 +0000 (+0800)
Subject: dmaengine: imx-dma: fix missing unlock on error in imxdma_xfer_desc()
X-Git-Tag: v3.6.5~14
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fbec5144b1a52c0d81db87626e802a64fd5a9a24;p=thirdparty%2Fkernel%2Fstable.git

dmaengine: imx-dma: fix missing unlock on error in imxdma_xfer_desc()

commit 720dfd250e48a8c7fd1b2b8645955413989c4ee0 upstream.

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

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c
index 5084975d793cd..8aa91132e9ab0 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;