From: Fabien Dessenne fabien.dessenne@foss.st.com
stable inclusion from stable-5.10.76 commit cfa79faf7e1ffa93e76461c7716864377bff76bd bugzilla: 182988 https://gitee.com/openeuler/kernel/issues/I4IAHF
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit c370bb474016ab9edfdabd7c08a88dd13a71ddbd upstream.
When resuming from low power, the driver attempts to restore the configuration of some pins. This is done by a call to: stm32_pinctrl_restore_gpio_regs(struct stm32_pinctrl *pctl, u32 pin) where 'pin' must be a valid pin value (i.e. matching some 'groups->pin'). Fix the current implementation which uses some wrong 'pin' value.
Fixes: e2f3cf18c3e2 ("pinctrl: stm32: add suspend/resume management") Signed-off-by: Fabien Dessenne fabien.dessenne@foss.st.com Link: https://lore.kernel.org/r/20211008122517.617633-1-fabien.dessenne@foss.st.co... Signed-off-by: Linus Walleij linus.walleij@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Chen Jun chenjun102@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com
Signed-off-by: Chen Jun chenjun102@huawei.com --- drivers/pinctrl/stm32/pinctrl-stm32.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/pinctrl/stm32/pinctrl-stm32.c b/drivers/pinctrl/stm32/pinctrl-stm32.c index 3af4430543dc..a5f1f6ba7439 100644 --- a/drivers/pinctrl/stm32/pinctrl-stm32.c +++ b/drivers/pinctrl/stm32/pinctrl-stm32.c @@ -1645,8 +1645,8 @@ int __maybe_unused stm32_pinctrl_resume(struct device *dev) struct stm32_pinctrl_group *g = pctl->groups; int i;
- for (i = g->pin; i < g->pin + pctl->ngroups; i++) - stm32_pinctrl_restore_gpio_regs(pctl, i); + for (i = 0; i < pctl->ngroups; i++, g++) + stm32_pinctrl_restore_gpio_regs(pctl, g->pin);
return 0; }