[MTD] m25p80.c mutex unlock fix

fix a mutex release bug in function m25p80_write.

Signed-off-by: Chen Gong <g.chen@freescale.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 25efd331ef28..b402269301f6 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -346,8 +346,10 @@ static int m25p80_write(struct mtd_info *mtd, loff_t to, size_t len,
         mutex_lock(&flash->lock);
 
         /* Wait until finished previous write command. */
-        if (wait_till_ready(flash))
+        if (wait_till_ready(flash)) {
+                mutex_unlock(&flash->lock);
                 return 1;
+        }
 
         write_enable(flash);