linux-kernel - Re: [PATCH v4 10/10] usb: gadget: f_hid: use alloc_ep

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Date:   Tue, 23 Aug 2016 14:03:23 +0300
From:   Felipe Balbi <balbi@...nel.org>
To:     Felipe Ferreri Tonello <eu@...ipetonello.com>,
        John Youn <John.Youn@...opsys.com>,
        "linux-usb\@vger.kernel.org" <linux-usb@...r.kernel.org>
Cc:     "linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
        Michal Nazarewicz <mina86@...a86.com>
Subject: Re: [PATCH v4 10/10] usb: gadget: f_hid: use alloc_ep_req()


Hi,

Felipe Ferreri Tonello <eu@...ipetonello.com> writes:
>> John Youn <John.Youn@...opsys.com> writes:
>>> On 8/8/2016 1:30 PM, Felipe F. Tonello wrote:
>>>> Use gadget's framework allocation function instead of directly calling
>>>> usb_ep_alloc_request().
>>>>
>>>> Signed-off-by: Felipe F. Tonello <eu@...ipetonello.com>
>>>> ---
>>>>  drivers/usb/gadget/function/f_hid.c | 6 +-----
>>>>  1 file changed, 1 insertion(+), 5 deletions(-)
>>>>
>>>> diff --git a/drivers/usb/gadget/function/f_hid.c b/drivers/usb/gadget/function/f_hid.c
>>>> index a010496e4e05..89d2e9a5a04f 100644
>>>> --- a/drivers/usb/gadget/function/f_hid.c
>>>> +++ b/drivers/usb/gadget/function/f_hid.c
>>>> @@ -611,14 +611,10 @@ static int hidg_bind(struct usb_configuration *c, struct usb_function *f)
>>>>  
>>>>  	/* preallocate request and buffer */
>>>>  	status = -ENOMEM;
>>>> -	hidg->req = usb_ep_alloc_request(hidg->in_ep, GFP_KERNEL);
>>>> +	hidg->req = alloc_ep_req(hidg->in_ep, hidg->report_length);
>>>>  	if (!hidg->req)
>>>>  		goto fail;
>>>>  
>>>> -	hidg->req->buf = kmalloc(hidg->report_length, GFP_KERNEL);
>>>> -	if (!hidg->req->buf)
>>>> -		goto fail;
>>>> -
>>>>  	/* set descriptor dynamic values */
>>>>  	hidg_interface_desc.bInterfaceSubClass = hidg->bInterfaceSubClass;
>>>>  	hidg_interface_desc.bInterfaceProtocol = hidg->bInterfaceProtocol;
>>>>
>>>
>>> Hi Felipe,
>>>
>>> This commit on your testing/next breaks compilation.
>>>
>>> ../drivers/usb/gadget/function/f_hid.c: In function ‘hidg_bind’:
>>> ../drivers/usb/gadget/function/f_hid.c:620:14: error: too few arguments to function ‘alloc_ep_req’
>>>   hidg->req = alloc_ep_req(hidg->in_ep, hidg->report_length);
>>>               ^
>>> In file included from ../drivers/usb/gadget/function/f_hid.c:24:0:
>>> ../drivers/usb/gadget/u_f.h:63:21: note: declared here
>>>  struct usb_request *alloc_ep_req(struct usb_ep *ep, size_t len, int default_len);
>> 
>> true that :-) Dropping from my queue.
>> 
>
> Are you applying the previous patches? Specially that this is the last
> patch in the series, how can it break with you if it doesn't break here?
> What should I do then?

Can you rebase your series on top of my testing/next? My HEAD is
at commit 95bbb3474f1e87c9ec7ebe2acf25006e5e94a824.

-- 
balbi

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