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>

diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c
index c889f3166205bee358d8f55644d733d08663fb0b..cd007a67b3021e6e384889bf06ff7c9b292a7906 100644 (file)
--- 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;