[PATCH] gpio: mxc: Unlock on error path in mxc_flip_edge()

[Dan Carpenter <error27@xxxxxxxxx>]

We recently added locking to this function but one error path was
over looked.  Drop the lock before returning.

Fixes: e5464277625c ("gpio: mxc: Protect GPIO irqchip RMW with bgpio spinlock")
Signed-off-by: Dan Carpenter <error27@xxxxxxxxx>
---
 drivers/gpio/gpio-mxc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c
index 6f673b2f2a1b..9d0cec4b82a3 100644
--- a/drivers/gpio/gpio-mxc.c
+++ b/drivers/gpio/gpio-mxc.c
@@ -249,10 +249,11 @@ static void mxc_flip_edge(struct mxc_gpio_port *port, u32 gpio)
 	} else {
 		pr_err("mxc: invalid configuration for GPIO %d: %x\n",
 		       gpio, edge);
-		return;
+		goto unlock;
 	}
 	writel(val | (edge << (bit << 1)), reg);
 
+unlock:
 	raw_spin_unlock_irqrestore(&port->gc.bgpio_lock, flags);
 }
 
-- 
2.35.1