linux-kernel - Re: [PATCH v6 2/4] usb: gadget: Refactor request completion

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Message-ID: <87sijassaq.fsf@steelpick.2x.cz>
Date:	Mon, 29 Sep 2014 11:13:33 +0200
From:	Michal Sojka <sojka@...ica.cz>
To:	Robert Baldyga <r.baldyga@...sung.com>, linux-usb@...r.kernel.org
Cc:	Alan Stern <stern@...land.harvard.edu>,
	Bryan Wu <cooloney@...il.com>, Felipe Balbi <balbi@...com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Linux LED Subsystem <linux-leds@...r.kernel.org>,
	linux-kernel@...r.kernel.org, michal.vokac@...ap.cz
Subject: Re: [PATCH v6 2/4] usb: gadget: Refactor request completion

On Mon, Sep 29 2014, Robert Baldyga wrote:
> Hi,
>
> On 09/24/2014 10:43 PM, Michal Sojka wrote:
>> Use the recently introduced usb_gadget_giveback_request() in favor of
>> direct invocation of the completion routine.
>> 
>> All places in drivers/usb/ matching "[-.]complete(" were replaced with a
>> call to usb_gadget_giveback_request(). This was compile-tested with all
>> ARM drivers enabled and runtime-tested for musb.
>> 
>> Signed-off-by: Michal Sojka <sojka@...ica.cz>

[...]

>> diff --git a/drivers/usb/gadget/udc/fsl_qe_udc.c b/drivers/usb/gadget/udc/fsl_qe_udc.c
>> index 7324308..dd18ea3 100644
>> --- a/drivers/usb/gadget/udc/fsl_qe_udc.c
>> +++ b/drivers/usb/gadget/udc/fsl_qe_udc.c
>> @@ -118,10 +118,7 @@ static void done(struct qe_ep *ep, struct qe_req *req, int status)
>>  	ep->stopped = 1;
>>  	spin_unlock(&udc->lock);
>>  
>> -	/* this complete() should a func implemented by gadget layer,
>> -	 * eg fsg->bulk_in_complete() */
>> -	if (req->req.complete)
>> -		req->req.complete(&ep->ep, &req->req);
>> +	usb_gadget_giveback_request(&ep->ep, &req->req);
>
> It looks like you have omitted if() statement. Are you sure that request
> has set complete() callback?

Yes, see the rest of the thread. This was suggested by other reviewers.

-Michal
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