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From: nicolas.ferre@atmel.com (Nicolas Ferre)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] usb: gadget: atmel_usba: always test udc->driver
Date: Fri, 9 May 2014 12:09:59 +0200	[thread overview]
Message-ID: <536CA977.7080404@atmel.com> (raw)
In-Reply-To: <1399389367-15456-1-git-send-email-alexandre.belloni@free-electrons.com>

On 06/05/2014 17:16, Alexandre Belloni :
> Found using smatch: drivers/usb/gadget/atmel_usba_udc.c:1689 usba_udc_irq()
> error: we previously assumed 'udc->driver' could be null (see line 1636)
> 
> Always test udc->driver before using its members.
> 
> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>


Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

Thanks,

> ---
>  drivers/usb/gadget/atmel_usba_udc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/gadget/atmel_usba_udc.c b/drivers/usb/gadget/atmel_usba_udc.c
> index 9f65324f9ae0..76023ce449a3 100644
> --- a/drivers/usb/gadget/atmel_usba_udc.c
> +++ b/drivers/usb/gadget/atmel_usba_udc.c
> @@ -1686,7 +1686,7 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
>  		reset_all_endpoints(udc);
>  
>  		if (udc->gadget.speed != USB_SPEED_UNKNOWN
> -				&& udc->driver->disconnect) {
> +				&& udc->driver && udc->driver->disconnect) {
>  			udc->gadget.speed = USB_SPEED_UNKNOWN;
>  			spin_unlock(&udc->lock);
>  			udc->driver->disconnect(&udc->gadget);
> 


-- 
Nicolas Ferre

WARNING: multiple messages have this Message-ID (diff)
From: Nicolas Ferre <nicolas.ferre@atmel.com>
To: Felipe Balbi <balbi@ti.com>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>, <linux-usb@vger.kernel.org>
Subject: Re: [PATCH] usb: gadget: atmel_usba: always test udc->driver
Date: Fri, 9 May 2014 12:09:59 +0200	[thread overview]
Message-ID: <536CA977.7080404@atmel.com> (raw)
In-Reply-To: <1399389367-15456-1-git-send-email-alexandre.belloni@free-electrons.com>

On 06/05/2014 17:16, Alexandre Belloni :
> Found using smatch: drivers/usb/gadget/atmel_usba_udc.c:1689 usba_udc_irq()
> error: we previously assumed 'udc->driver' could be null (see line 1636)
> 
> Always test udc->driver before using its members.
> 
> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>


Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

Thanks,

> ---
>  drivers/usb/gadget/atmel_usba_udc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/gadget/atmel_usba_udc.c b/drivers/usb/gadget/atmel_usba_udc.c
> index 9f65324f9ae0..76023ce449a3 100644
> --- a/drivers/usb/gadget/atmel_usba_udc.c
> +++ b/drivers/usb/gadget/atmel_usba_udc.c
> @@ -1686,7 +1686,7 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
>  		reset_all_endpoints(udc);
>  
>  		if (udc->gadget.speed != USB_SPEED_UNKNOWN
> -				&& udc->driver->disconnect) {
> +				&& udc->driver && udc->driver->disconnect) {
>  			udc->gadget.speed = USB_SPEED_UNKNOWN;
>  			spin_unlock(&udc->lock);
>  			udc->driver->disconnect(&udc->gadget);
> 


-- 
Nicolas Ferre

  reply	other threads:[~2014-05-09 10:09 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-05-06 15:16 [PATCH] usb: gadget: atmel_usba: always test udc->driver Alexandre Belloni
2014-05-06 15:16 ` Alexandre Belloni
2014-05-09 10:09 ` Nicolas Ferre [this message]
2014-05-09 10:09   ` Nicolas Ferre

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