[PATCH 5/6] pinctrl: rockchip: fix crash caused by invalid gpio bank

[Jianqun Xu]

Add valid check for gpio bank.

Change-Id: Ia4609c3045b5df7879beab3c15d791ff54a1f49b
Signed-off-by: Jianqun Xu <jay...@rock-chips.com>
---
 drivers/pinctrl/pinctrl-rockchip.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-rockchip.c 
b/drivers/pinctrl/pinctrl-rockchip.c
index 6080573155f6..5b16b69e311f 100644
--- a/drivers/pinctrl/pinctrl-rockchip.c
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -2526,9 +2526,9 @@ static int rockchip_pmx_set(struct pinctrl_dev *pctldev, 
unsigned selector,
                        break;
        }
 
-       if (ret) {
+       if (ret && cnt) {
                /* revert the already done pin settings */
-               for (cnt--; cnt >= 0; cnt--)
+               for (cnt--; cnt >= 0 && !data[cnt].func; cnt--)
                        rockchip_set_mux(bank, pins[cnt] - bank->pin_base, 0);
 
                return ret;
@@ -2599,9 +2599,13 @@ static int rockchip_pmx_gpio_set_direction(struct 
pinctrl_dev *pctldev,
                                              unsigned offset, bool input)
 {
        struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+       struct rockchip_pin_bank *bank = &info->ctrl->pin_banks[offset / 32];
        struct gpio_chip *chip;
        int pin;
 
+       if (!bank || !bank->valid)
+               return 0;
+
        chip = range->gc;
        pin = offset - chip->base;
        dev_dbg(info->dev, "gpio_direction for pin %u as %s-%d to %s\n",
@@ -3022,6 +3026,8 @@ static int rockchip_pinctrl_register(struct 
platform_device *pdev,
 
        for (bank = 0; bank < info->ctrl->nr_banks; ++bank) {
                pin_bank = &info->ctrl->pin_banks[bank];
+               if (!pin_bank->valid)
+                       continue;
                pin_bank->grange.name = pin_bank->name;
                pin_bank->grange.id = bank;
                pin_bank->grange.pin_base = pin_bank->pin_base;
-- 
2.17.1