gpio-sta2x11: don't use pdata if null

If there is no platform data available, the driver shouldn't use the
pointer or it will oops.  Since things will mostly work nonetheless,
(the BIOS may have set up the pins properly), I'd better not fail the
probe even in this case.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Acked-by: Giancarlo Asnaghi <giancarlo.asnaghi@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/gpio/gpio-sta2x11.c b/drivers/gpio/gpio-sta2x11.c
index 38416be8ba11..6064fb376e11 100644
--- a/drivers/gpio/gpio-sta2x11.c
+++ b/drivers/gpio/gpio-sta2x11.c
@@ -383,8 +383,9 @@ static int __devinit gsta_probe(struct platform_device *dev)
         }
         spin_lock_init(&chip->lock);
         gsta_gpio_setup(chip);
-        for (i = 0; i < GSTA_NR_GPIO; i++)
-                gsta_set_config(chip, i, gpio_pdata->pinconfig[i]);
+        if (gpio_pdata)
+                for (i = 0; i < GSTA_NR_GPIO; i++)
+                        gsta_set_config(chip, i, gpio_pdata->pinconfig[i]);
 
         /* 384 was used in previous code: be compatible for other drivers */
         err = irq_alloc_descs(-1, 384, GSTA_NR_GPIO, NUMA_NO_NODE);