gpio: davinci: Fix the number of controllers allocated

Driver only needs to allocate for [ngpio / 32] controllers,
as each controller handles 32 gpios. But the current driver
allocates for ngpio of which the extra allocated are unused.
Fix it be registering only the required number of controllers.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c
index c889f3166205..cd007a67b302 100644
--- a/drivers/gpio/gpio-davinci.c
+++ b/drivers/gpio/gpio-davinci.c
@@ -195,7 +195,7 @@ static int davinci_gpio_of_xlate(struct gpio_chip *gc,
 static int davinci_gpio_probe(struct platform_device *pdev)
 {
         int i, base;
-        unsigned ngpio;
+        unsigned ngpio, nbank;
         struct davinci_gpio_controller *chips;
         struct davinci_gpio_platform_data *pdata;
         struct davinci_gpio_regs __iomem *regs;
@@ -224,8 +224,9 @@ static int davinci_gpio_probe(struct platform_device *pdev)
         if (WARN_ON(ARCH_NR_GPIOS < ngpio))
                 ngpio = ARCH_NR_GPIOS;
 
+        nbank = DIV_ROUND_UP(ngpio, 32);
         chips = devm_kzalloc(dev,
-                             ngpio * sizeof(struct davinci_gpio_controller),
+                             nbank * sizeof(struct davinci_gpio_controller),
                              GFP_KERNEL);
         if (!chips)
                 return -ENOMEM;