[PATCH] pinctrl: stm32: use valid pin identifier in stm32_pinctrl_resume()

[PATCH] pinctrl: stm32: use valid pin identifier in stm32_pinctrl_resume()

[Fabien Dessenne]

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>
---
 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 68b3886f9f0f..dfd8888a222a 100644
--- a/drivers/pinctrl/stm32/pinctrl-stm32.c
+++ b/drivers/pinctrl/stm32/pinctrl-stm32.c
@@ -1644,8 +1644,8 @@ 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;
 }
-- 
2.25.1

Re: [PATCH] pinctrl: stm32: use valid pin identifier in stm32_pinctrl_resume()

[Linus Walleij]

On Fri, Oct 8, 2021 at 2:25 PM Fabien Dessenne
<fabien.dessenne@foss.st.com> wrote:

> 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>

Patch applied for fixes.

Yours,
Linus Walleij