linux-kernel - Re: [PATCH 2/2] usb: usbtest: Always clear halt else further tests will fail

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Message-ID: <20131219040146.GC19091@hr-dev.amd.com>
Date:	Thu, 19 Dec 2013 12:01:47 +0800
From:	Huang Rui <ray.huang@....com>
To:	Roger Quadros <rogerq@...com>
CC:	<gregkh@...uxfoundation.org>, <stern@...land.harvard.edu>,
	<balbi@...com>, <linux-usb@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] usb: usbtest: Always clear halt else further tests
 will fail

On Wed, Dec 18, 2013 at 03:40:11PM +0530, Roger Quadros wrote:
> In test_halt() we set an endpoint halt condition and return on halt verification
> failure, then the enpoint will remain halted and all further tests related
> to that enpoint will fail. This is because we don't tackle endpoint halt error condition
> in any of the tests. To avoid that situation, make sure to clear the
> halt condition before exiting test_halt().
> 
> Signed-off-by: Roger Quadros <rogerq@...com>
> Reviewed-by: Felipe Balbi <balbi@...com>

Acked-by: Huang Rui <ray.huang@....com>

> ---
>  drivers/usb/misc/usbtest.c | 11 ++++++++++-
>  1 file changed, 10 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
> index 6294e1b..300b726 100644
> --- a/drivers/usb/misc/usbtest.c
> +++ b/drivers/usb/misc/usbtest.c
> @@ -1545,8 +1545,17 @@ static int test_halt(struct usbtest_dev *tdev, int ep, struct urb *urb)
>  		return retval;
>  	}
>  	retval = verify_halted(tdev, ep, urb);
> -	if (retval < 0)
> +	if (retval < 0) {
> +		int ret;
> +
> +		/* clear halt anyways, else further tests will fail */
> +		ret = usb_clear_halt(urb->dev, urb->pipe);
> +		if (ret)
> +			ERROR(tdev, "ep %02x couldn't clear halt, %d\n",
> +			      ep, ret);
> +
>  		return retval;
> +	}
>  
>  	/* clear halt (tests API + protocol), verify it worked */
>  	retval = usb_clear_halt(urb->dev, urb->pipe);
> -- 
> 1.8.3.2
> 
> 

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