[PATCH 5/6] pinctrl: rockchip: fix crash caused by invalid gpio bank
Jianqun Xu
jay.xu at rock-chips.com
Mon Aug 31 04:50:10 EDT 2020
Add valid check for gpio bank.
Change-Id: Ia4609c3045b5df7879beab3c15d791ff54a1f49b
Signed-off-by: Jianqun Xu <jay.xu at 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
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