linux-kernel - Re: [PATCH] i2c: imx: add irqf_no

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Message-ID: <20221116090249.GB12278@pengutronix.de>
Date:   Wed, 16 Nov 2022 10:02:49 +0100
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Clark Wang <xiaoning.wang@....com>
Cc:     linux@...pel-privat.de, kernel@...gutronix.de, shawnguo@...nel.org,
        s.hauer@...gutronix.de, festevam@...il.com, linux-imx@....com,
        linux-i2c@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] i2c: imx: add irqf_no_suspend flag

On Wed, Nov 16, 2022 at 03:44:31PM +0800, Clark Wang wrote:
> The i2c irq is masked when user starts an i2c transfer process
> during noirq suspend stage. As a result, i2c transfer fails.
> To solve the problem, IRQF_NO_SUSPEND is added to i2c bus.
> 
> Signed-off-by: Clark Wang <xiaoning.wang@....com>

Acked-by: Oleksij Rempel <o.rempel@...gutronix.de>

> ---
>  drivers/i2c/busses/i2c-imx.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
> index 1ce0cf7a323f..ba49b2f7a1d1 100644
> --- a/drivers/i2c/busses/i2c-imx.c
> +++ b/drivers/i2c/busses/i2c-imx.c
> @@ -1510,7 +1510,8 @@ static int i2c_imx_probe(struct platform_device *pdev)
>  		goto rpm_disable;
>  
>  	/* Request IRQ */
> -	ret = request_threaded_irq(irq, i2c_imx_isr, NULL, IRQF_SHARED,
> +	ret = request_threaded_irq(irq, i2c_imx_isr, NULL,
> +				   IRQF_SHARED | IRQF_NO_SUSPEND,
>  				   pdev->name, i2c_imx);
>  	if (ret) {
>  		dev_err(&pdev->dev, "can't claim irq %d\n", irq);
> -- 
> 2.34.1
> 
> 

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