w1: w1_ds28e04: unlock on error path in w1_f1C_write_pio()

We should unlock here before returning.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/w1/slaves/w1_ds28e04.c b/drivers/w1/slaves/w1_ds28e04.c
index f652db3782bf..4aa1aa90480d 100644
--- a/drivers/w1/slaves/w1_ds28e04.c
+++ b/drivers/w1/slaves/w1_ds28e04.c
@@ -309,8 +309,10 @@ static ssize_t w1_f1C_write_pio(struct file *filp, struct kobject *kobj,
         mutex_lock(&sl->master->mutex);
 
         /* Write the PIO data */
-        if (w1_reset_select_slave(sl))
+        if (w1_reset_select_slave(sl)) {
+                mutex_unlock(&sl->master->mutex);
                 return -1;
+        }
 
         /* set bit 7..2 to value '1' */
         *buf = *buf | 0xFC;