linux-kernel - Re: [PATCH v3 2/7] mfd: tqmx86: clear GPIO IRQ resource when no IRQ is set

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Message-ID: <YQvn9dkFluRYj80r@google.com>
Date:   Thu, 5 Aug 2021 14:30:29 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Matthias Schiffer <matthias.schiffer@...tq-group.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Andrew Lunn <andrew@...n.ch>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/7] mfd: tqmx86: clear GPIO IRQ resource when no IRQ
 is set

On Fri, 16 Jul 2021, Matthias Schiffer wrote:

> The driver was registering IRQ 0 when no IRQ was set. This leads to
> warnings with newer kernels.
> 
> Clear the resource flags, so no resource is registered at all in this
> case.
> 
> Fixes: 2f17dd34ffed ("mfd: tqmx86: IO controller with I2C, Wachdog and GPIO")
> Signed-off-by: Matthias Schiffer <matthias.schiffer@...tq-group.com>
> Reviewed-by: Andrew Lunn <andrew@...n.ch>
> ---
> 
> v2: add Fixes line
> v3: no changes
> 
>  drivers/mfd/tqmx86.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/mfd/tqmx86.c b/drivers/mfd/tqmx86.c
> index ddddf08b6a4c..732013f40e4e 100644
> --- a/drivers/mfd/tqmx86.c
> +++ b/drivers/mfd/tqmx86.c
> @@ -209,6 +209,8 @@ static int tqmx86_probe(struct platform_device *pdev)
>  
>  		/* Assumes the IRQ resource is first. */
>  		tqmx_gpio_resources[0].start = gpio_irq;
> +	} else {
> +		tqmx_gpio_resources[0].flags = 0;

Strange - why is this !0 in the first place?

>  	}
>  
>  	ocores_platfom_data.clock_khz = tqmx86_board_id_to_clk_rate(board_id);

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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