linux-kernel - Re: [PATCH V2] net: mv643xx_eth: use platform_get_irq() instead of platform_get

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Date:   Fri, 11 Mar 2022 08:20:51 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     cgel.zte@...il.com
Cc:     sebastian.hesselbarth@...il.com, davem@...emloft.net,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Minghao Chi <chi.minghao@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: Re: [PATCH V2] net: mv643xx_eth: use platform_get_irq() instead of
 platform_get_resource()

On Thu, 10 Mar 2022 06:20:35 +0000 cgel.zte@...il.com wrote:
> @@ -3189,9 +3188,10 @@ static int mv643xx_eth_probe(struct platform_device *pdev)
>  	timer_setup(&mp->rx_oom, oom_timer_wrapper, 0);
>  
>  
> -	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
> -	BUG_ON(!res);
> -	dev->irq = res->start;
> +	irq = platform_get_irq(pdev, 0);
> +	if (WARN_ON(irq < 0))
> +		return irq;

You can't just return from here, there are operations that need 
to be undone, look at the end of this function :/ Please follow 
up with an incremental fix ASAP.

> +	dev->irq = irq;
>