From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Thu, 14 Feb 2013 09:00:17 +0000 (+0200)
Subject: dma: coh901318: avoid unbalanced locking
X-Git-Tag: v3.9-rc1~80^2~8
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=4168d0d9d304f184f786b1f00750557b8e09453c;p=~emulex%2Finfiniband.git

dma: coh901318: avoid unbalanced locking

In case the len is 0 we must return without trying to unlock the lock that was
not locked.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
---

diff --git a/drivers/dma/coh901318_lli.c b/drivers/dma/coh901318_lli.c
index 780e0429b38..fe9cc5eedda 100644
--- a/drivers/dma/coh901318_lli.c
+++ b/drivers/dma/coh901318_lli.c
@@ -61,7 +61,7 @@ coh901318_lli_alloc(struct coh901318_pool *pool, unsigned int len)
 	dma_addr_t phy;
 
 	if (len == 0)
-		goto err;
+		return NULL;
 
 	spin_lock(&pool->lock);