[PATCH] gpio: pisosr: add missing unlock

[Sudip Mukherjee <sudipm.mukherjee@xxxxxxxxx>]

If spi_read() fails then we just returned but we missed unlocking the
mutex.

Signed-off-by: Sudip Mukherjee <sudip@xxxxxxxxxxxxxxx>
---
 drivers/gpio/gpio-pisosr.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/gpio/gpio-pisosr.c b/drivers/gpio/gpio-pisosr.c
index 58ea08d..f9f1074 100644
--- a/drivers/gpio/gpio-pisosr.c
+++ b/drivers/gpio/gpio-pisosr.c
@@ -53,12 +53,10 @@ static int pisosr_gpio_refresh(struct pisosr_gpio *gpio)
 	}
 
 	ret = spi_read(gpio->spi, gpio->buffer, gpio->buffer_size);
-	if (ret)
-		return ret;
 
 	mutex_unlock(&gpio->lock);
 
-	return 0;
+	return ret;
 }
 
 static int pisosr_gpio_get_direction(struct gpio_chip *chip,
-- 
1.9.1

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