linux-kernel - Re: [PATCH v2] usb: gadget: mass_storage: fix error return code in msg

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Message-ID: <20201116140104.GG28313@b29397-desktop>
Date:   Mon, 16 Nov 2020 14:01:33 +0000
From:   Peter Chen <peter.chen@....com>
To:     Chen Zhou <chenzhou10@...wei.com>
CC:     "balbi@...nel.org" <balbi@...nel.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "weiyongjun1@...wei.com" <weiyongjun1@...wei.com>,
        "jun.li@...escale.com" <jun.li@...escale.com>,
        "rogerq@...com" <rogerq@...com>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Hulk Robot <hulkci@...wei.com>
Subject: Re: [PATCH v2] usb: gadget: mass_storage: fix error return code in
 msg_bind()

On 20-11-12 21:54:23, Chen Zhou wrote:
> Fix to return a negative error code from the error handling case
> instead of 0 in function msg_bind(), as done elsewhere in this
> function.
> 
> Fixes: d86788979761 ("usb: gadget: mass_storage: allocate and init otg descriptor by otg capabilities")
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: Chen Zhou <chenzhou10@...wei.com>

Reviewed-by: Peter Chen <peter.chen@....com>

Peter
> ---
>  drivers/usb/gadget/legacy/mass_storage.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/gadget/legacy/mass_storage.c b/drivers/usb/gadget/legacy/mass_storage.c
> index 9ed22c5fb7fe..ac1741126619 100644
> --- a/drivers/usb/gadget/legacy/mass_storage.c
> +++ b/drivers/usb/gadget/legacy/mass_storage.c
> @@ -175,8 +175,10 @@ static int msg_bind(struct usb_composite_dev *cdev)
>  		struct usb_descriptor_header *usb_desc;
>  
>  		usb_desc = usb_otg_descriptor_alloc(cdev->gadget);
> -		if (!usb_desc)
> +		if (!usb_desc) {
> +			status = -ENOMEM;
>  			goto fail_string_ids;
> +		}
>  		usb_otg_descriptor_init(cdev->gadget, usb_desc);
>  		otg_desc[0] = usb_desc;
>  		otg_desc[1] = NULL;
> -- 
> 2.20.1
> 

-- 

Thanks,
Peter Chen