linux-kernel - Re: [PATCH] USB: host: ehci: Add error handling in ehci_mxc_drv

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Message-ID: <Pine.LNX.4.44L0.2005080950180.19653-100000@netrider.rowland.org>
Date:   Fri, 8 May 2020 09:51:22 -0400 (EDT)
From:   Alan Stern <stern@...land.harvard.edu>
To:     Tang Bin <tangbin@...s.chinamobile.com>
cc:     gregkh@...uxfoundation.org, <linux-usb@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Zhang Shengju <zhangshengju@...s.chinamobile.com>
Subject: Re: [PATCH] USB: host: ehci: Add error handling in ehci_mxc_drv_probe()

On Fri, 8 May 2020, Tang Bin wrote:

> The function ehci_mxc_drv_probe() does not perform sufficient error
> checking after executing platform_get_irq(), thus fix it.

Aside from the "irq <= 0" issue, the Subject: line should say 
"ehci-mxc", not "ehci".

Alan Stern

> Fixes: 7e8d5cd93fa ("USB: Add EHCI support for MX27 and MX31 based boards")
> Signed-off-by: Zhang Shengju <zhangshengju@...s.chinamobile.com>
> Signed-off-by: Tang Bin <tangbin@...s.chinamobile.com>
> ---
>  drivers/usb/host/ehci-mxc.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/usb/host/ehci-mxc.c b/drivers/usb/host/ehci-mxc.c
> index a1eb5ee77..a0b42ba59 100644
> --- a/drivers/usb/host/ehci-mxc.c
> +++ b/drivers/usb/host/ehci-mxc.c
> @@ -50,6 +50,8 @@ static int ehci_mxc_drv_probe(struct platform_device *pdev)
>  	}
>  
>  	irq = platform_get_irq(pdev, 0);
> +	if (irq < 0)
> +		return irq;
>  
>  	hcd = usb_create_hcd(&ehci_mxc_hc_driver, dev, dev_name(dev));
>  	if (!hcd)
>