linux-kernel - Re: [PATCH V3 3/3] gpio: gpio-sprd: Make the irqchip immutable

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Date:   Thu, 29 Dec 2022 11:00:33 +0800
From:   Baolin Wang <baolin.wang@...ux.alibaba.com>
To:     Cixi Geng <cixi.geng@...ux.dev>, linus.walleij@...aro.org,
        brgl@...ev.pl, orsonzhai@...il.com, zhang.lyra@...il.com
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        cixi.geng1@...soc.com
Subject: Re: [PATCH V3 3/3] gpio: gpio-sprd: Make the irqchip immutable



On 12/28/2022 8:24 PM, Cixi Geng wrote:
> From: Cixi Geng <cixi.geng1@...soc.com>
> 
> Make the struct irq_chip const, flag it as IRQCHIP_IMMUTABLE, add the
> new helper functions, and call the appropriate gpiolib functions.
> 
> Reported-by: kernel test robot <lkp@...el.com>
> Reported-by: Julia Lawall <julia.lawall@...6.fr>
> Signed-off-by: Cixi Geng <cixi.geng1@...soc.com>

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

> ---
>   drivers/gpio/gpio-sprd.c | 9 ++++++---
>   1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpio/gpio-sprd.c b/drivers/gpio/gpio-sprd.c
> index 9bff63990eee..072b4e653216 100644
> --- a/drivers/gpio/gpio-sprd.c
> +++ b/drivers/gpio/gpio-sprd.c
> @@ -120,6 +120,7 @@ static void sprd_gpio_irq_mask(struct irq_data *data)
>   	u32 offset = irqd_to_hwirq(data);
>   
>   	sprd_gpio_update(chip, offset, SPRD_GPIO_IE, 0);
> +	gpiochip_disable_irq(chip, offset);
>   }
>   
>   static void sprd_gpio_irq_ack(struct irq_data *data)
> @@ -136,6 +137,7 @@ static void sprd_gpio_irq_unmask(struct irq_data *data)
>   	u32 offset = irqd_to_hwirq(data);
>   
>   	sprd_gpio_update(chip, offset, SPRD_GPIO_IE, 1);
> +	gpiochip_enable_irq(chip, offset); >   }
>   
>   static int sprd_gpio_irq_set_type(struct irq_data *data,
> @@ -205,13 +207,14 @@ static void sprd_gpio_irq_handler(struct irq_desc *desc)
>   	chained_irq_exit(ic, desc);
>   }
>   
> -static struct irq_chip sprd_gpio_irqchip = {
> +static const struct irq_chip sprd_gpio_irqchip = {
>   	.name = "sprd-gpio",
>   	.irq_ack = sprd_gpio_irq_ack,
>   	.irq_mask = sprd_gpio_irq_mask,
>   	.irq_unmask = sprd_gpio_irq_unmask,
>   	.irq_set_type = sprd_gpio_irq_set_type,
> -	.flags = IRQCHIP_SKIP_SET_WAKE,
> +	.flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_IMMUTABLE,
> +	GPIOCHIP_IRQ_RESOURCE_HELPERS,
>   };
>   
>   static int sprd_gpio_probe(struct platform_device *pdev)
> @@ -245,7 +248,7 @@ static int sprd_gpio_probe(struct platform_device *pdev)
>   	sprd_gpio->chip.direction_output = sprd_gpio_direction_output;
>   
>   	irq = &sprd_gpio->chip.irq;
> -	irq->chip = &sprd_gpio_irqchip;
> +	gpio_irq_chip_set_chip(irq, &sprd_gpio_irqchip);
>   	irq->handler = handle_bad_irq;
>   	irq->default_type = IRQ_TYPE_NONE;
>   	irq->parent_handler = sprd_gpio_irq_handler;