linux-kernel - Re: [PATCH RESEND v2 4/5] extcon: extcon-max8997: Fix IRQ freeing at error path

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Date:   Thu, 10 Jun 2021 18:53:29 +0900
From:   Chanwoo Choi <cw00.choi@...sung.com>
To:     Matti Vaittinen <matti.vaittinen@...rohmeurope.com>,
        Matti Vaittinen <mazziesaccount@...il.com>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND v2 4/5] extcon: extcon-max8997: Fix IRQ freeing
 at error path

On 6/8/21 7:10 PM, Matti Vaittinen wrote:
> If reading MAX8997_MUIC_REG_STATUS1 fails at probe the driver exits
> without freeing the requested IRQs.
> 
> Free the IRQs prior returning if reading the status fails.
> 
> Fixes: 3e34c8198960 ("extcon: max8997: Avoid forcing UART path on drive probe")
> Signed-off-by: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
> Reviewed-by: Hans de Goede <hdegoede@...hat.com>
> ---
> Changelog:
>  v2:
>    - new patch (avoid backporting devm_wq just to fix IRQ freeing)
> ---
>  drivers/extcon/extcon-max8997.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/extcon/extcon-max8997.c b/drivers/extcon/extcon-max8997.c
> index e1408075ef7d..c15a612067af 100644
> --- a/drivers/extcon/extcon-max8997.c
> +++ b/drivers/extcon/extcon-max8997.c
> @@ -733,7 +733,7 @@ static int max8997_muic_probe(struct platform_device *pdev)
>  				2, info->status);
>  	if (ret) {
>  		dev_err(info->dev, "failed to read MUIC register\n");
> -		return ret;
> +		goto err_irq;
>  	}
>  	cable_type = max8997_muic_get_cable_type(info,
>  					   MAX8997_CABLE_GROUP_ADC, &attached);
> 

Acked-by: Chanwoo Choi <cw00.choi@...sung.com>

-- 
Best Regards,
Chanwoo Choi
Samsung Electronics