From: Ludovic Desroches <ludovic.desroches@atmel.com>
Date: Thu, 13 Nov 2014 10:52:43 +0000 (+0100)
Subject: dmaengine: at_xdmac: fix missing spin_unlock
X-Git-Tag: v3.19-rc1~57^2~5^2~2
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=87809839a56603b3ace6e7250a81afadcd916691;p=karo-tx-linux.git

dmaengine: at_xdmac: fix missing spin_unlock

Lock taken when entering the function but unlock missing before it
returns.

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
---

diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c
index bf2aacbbf4cc..586275fe1120 100644
--- a/drivers/dma/at_xdmac.c
+++ b/drivers/dma/at_xdmac.c
@@ -901,6 +901,7 @@ at_xdmac_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
 	 */
 	if (!desc->active_xfer) {
 		dma_set_residue(txstate, desc->xfer_size);
+		spin_unlock_bh(&atchan->lock);
 		return ret;
 	}