gpio: davinci: Use signed type for 'irq' variable

Variable 'irq' is declared as unsigned and then used to store
negative return values from irq_alloc_descs() such as -EINVAL.
This patch fix this by declaring the variable as a signed.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c
index 7629b4f12b7f..29321eea3c44 100644
--- a/drivers/gpio/gpio-davinci.c
+++ b/drivers/gpio/gpio-davinci.c
@@ -423,7 +423,8 @@ static const struct irq_domain_ops davinci_gpio_irq_ops = {
 
 static int davinci_gpio_irq_setup(struct platform_device *pdev)
 {
-        unsigned        gpio, irq, bank;
+        unsigned        gpio, bank;
+        int             irq;
         struct clk      *clk;
         u32             binten = 0;
         unsigned        ngpio, bank_irq;