gpio: pmic-eic-sprd: Modification of UNISOC Platform PMIC EIC Driver

[PATCH V2 2/2] gpio: pmic-eic-sprd: Add can_sleep flag for PMIC EIC chip

Posted by Wenhua Lin 2 years, 4 months ago

The drivers uses a mutex and I2C bus access in its PMIC EIC chip
get implementation. This means these functions can sleep and the PMIC EIC
chip should set the can_sleep property to true.

This will ensure that a warning is printed when trying to get the
value from a context that potentially can't sleep.

Signed-off-by: Wenhua Lin <Wenhua.Lin@unisoc.com>
---
 drivers/gpio/gpio-pmic-eic-sprd.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpio/gpio-pmic-eic-sprd.c b/drivers/gpio/gpio-pmic-eic-sprd.c
index 442968bb2490..f04a40288638 100644
--- a/drivers/gpio/gpio-pmic-eic-sprd.c
+++ b/drivers/gpio/gpio-pmic-eic-sprd.c
@@ -353,6 +353,7 @@ static int sprd_pmic_eic_probe(struct platform_device *pdev)
 	pmic_eic->chip.set_config = sprd_pmic_eic_set_config;
 	pmic_eic->chip.set = sprd_pmic_eic_set;
 	pmic_eic->chip.get = sprd_pmic_eic_get;
+	pmic_eic->chip.can_sleep = true;
 
 	irq = &pmic_eic->chip.irq;
 	gpio_irq_chip_set_chip(irq, &pmic_eic_irq_chip);
-- 
2.17.1

Re: [PATCH V2 2/2] gpio: pmic-eic-sprd: Add can_sleep flag for PMIC EIC chip

Posted by Baolin Wang 2 years, 4 months ago


On 9/21/2023 8:25 PM, Wenhua Lin wrote:
> The drivers uses a mutex and I2C bus access in its PMIC EIC chip
> get implementation. This means these functions can sleep and the PMIC EIC
> chip should set the can_sleep property to true.
> 
> This will ensure that a warning is printed when trying to get the
> value from a context that potentially can't sleep.

LGTM.
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>

> Signed-off-by: Wenhua Lin <Wenhua.Lin@unisoc.com>
> ---
>   drivers/gpio/gpio-pmic-eic-sprd.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpio/gpio-pmic-eic-sprd.c b/drivers/gpio/gpio-pmic-eic-sprd.c
> index 442968bb2490..f04a40288638 100644
> --- a/drivers/gpio/gpio-pmic-eic-sprd.c
> +++ b/drivers/gpio/gpio-pmic-eic-sprd.c
> @@ -353,6 +353,7 @@ static int sprd_pmic_eic_probe(struct platform_device *pdev)
>   	pmic_eic->chip.set_config = sprd_pmic_eic_set_config;
>   	pmic_eic->chip.set = sprd_pmic_eic_set;
>   	pmic_eic->chip.get = sprd_pmic_eic_get;
> +	pmic_eic->chip.can_sleep = true;
>   
>   	irq = &pmic_eic->chip.irq;
>   	gpio_irq_chip_set_chip(irq, &pmic_eic_irq_chip);

Re: [PATCH V2 2/2] gpio: pmic-eic-sprd: Add can_sleep flag for PMIC EIC chip

Posted by Andy Shevchenko 2 years, 4 months ago

On Thu, Sep 21, 2023 at 08:25:27PM +0800, Wenhua Lin wrote:
> The drivers uses a mutex and I2C bus access in its PMIC EIC chip
> get implementation. This means these functions can sleep and the PMIC EIC
> chip should set the can_sleep property to true.
> 
> This will ensure that a warning is printed when trying to get the
> value from a context that potentially can't sleep.

This deserves a Fixes tag.

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH V2 2/2] gpio: pmic-eic-sprd: Add can_sleep flag for PMIC EIC chip

Posted by Bartosz Golaszewski 2 years, 4 months ago

On Thu, Sep 21, 2023 at 5:40 PM Andy Shevchenko <andy@kernel.org> wrote:
>
> On Thu, Sep 21, 2023 at 08:25:27PM +0800, Wenhua Lin wrote:
> > The drivers uses a mutex and I2C bus access in its PMIC EIC chip
> > get implementation. This means these functions can sleep and the PMIC EIC
> > chip should set the can_sleep property to true.
> >
> > This will ensure that a warning is printed when trying to get the
> > value from a context that potentially can't sleep.
>
> This deserves a Fixes tag.
>
> --
> With Best Regards,
> Andy Shevchenko
>
>

Added when applying and queued for fixes.

Bart