From: Felipe Ferreri Tonello <eu@felipetonello.com>
To: Robert Baldyga <r.baldyga@samsung.com>, linux-usb@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, Felipe Balbi <balbi@ti.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Andrzej Pietrasiewicz <andrzej.p@samsung.com>,
Clemens Ladisch <clemens@ladisch.de>
Subject: Re: [PATCH v4 3/7] usb: gadget: define free_ep_req as universal function
Date: Tue, 27 Oct 2015 12:53:51 +0000 [thread overview]
Message-ID: <562F73DF.6000307@felipetonello.com> (raw)
In-Reply-To: <562F483C.9000307@samsung.com>
Hi Robert,
On 27/10/15 09:47, Robert Baldyga wrote:
> On 10/27/2015 10:18 AM, Felipe Ferreri Tonello wrote:
>> Hi Robert,
>>
>> On 27/10/15 06:53, Robert Baldyga wrote:
>>> On 10/26/2015 05:55 PM, Felipe F. Tonello wrote:
>>>> This function is shared between gadget functions, so this avoid unnecessary
>>>> duplicated code and potentially avoid memory leaks.
>>>>
>>>> Signed-off-by: Felipe F. Tonello <eu@felipetonello.com>
>>>> ---
>>>> drivers/usb/gadget/function/f_midi.c | 6 ------
>>>> drivers/usb/gadget/function/f_sourcesink.c | 6 ------
>>>> drivers/usb/gadget/function/g_zero.h | 1 -
>>>> drivers/usb/gadget/u_f.c | 8 ++++++++
>>>> drivers/usb/gadget/u_f.h | 3 +--
>>>> 5 files changed, 9 insertions(+), 15 deletions(-)
>>>>
>>>> diff --git a/drivers/usb/gadget/function/f_midi.c b/drivers/usb/gadget/function/f_midi.c
>>>> index c19f154..4c01c8a 100644
>>>> --- a/drivers/usb/gadget/function/f_midi.c
>>>> +++ b/drivers/usb/gadget/function/f_midi.c
>>>> @@ -202,12 +202,6 @@ static inline struct usb_request *midi_alloc_ep_req(struct usb_ep *ep,
>>>> return alloc_ep_req(ep, length, length);
>>>> }
>>>>
>>>> -static void free_ep_req(struct usb_ep *ep, struct usb_request *req)
>>>> -{
>>>> - kfree(req->buf);
>>>> - usb_ep_free_request(ep, req);
>>>> -}
>>>> -
>>>> static const uint8_t f_midi_cin_length[] = {
>>>> 0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1
>>>> };
>>>> diff --git a/drivers/usb/gadget/function/f_sourcesink.c b/drivers/usb/gadget/function/f_sourcesink.c
>>>> index 3a5ae99..eedea7f 100644
>>>> --- a/drivers/usb/gadget/function/f_sourcesink.c
>>>> +++ b/drivers/usb/gadget/function/f_sourcesink.c
>>>> @@ -307,12 +307,6 @@ static inline struct usb_request *ss_alloc_ep_req(struct usb_ep *ep, int len)
>>>> return alloc_ep_req(ep, len, buflen);
>>>> }
>>>>
>>>> -void free_ep_req(struct usb_ep *ep, struct usb_request *req)
>>>> -{
>>>> - kfree(req->buf);
>>>> - usb_ep_free_request(ep, req);
>>>> -}
>>>> -
>>>> static void disable_ep(struct usb_composite_dev *cdev, struct usb_ep *ep)
>>>> {
>>>> int value;
>>>> diff --git a/drivers/usb/gadget/function/g_zero.h b/drivers/usb/gadget/function/g_zero.h
>>>> index 15f1809..5ed90b4 100644
>>>> --- a/drivers/usb/gadget/function/g_zero.h
>>>> +++ b/drivers/usb/gadget/function/g_zero.h
>>>> @@ -59,7 +59,6 @@ void lb_modexit(void);
>>>> int lb_modinit(void);
>>>>
>>>> /* common utilities */
>>>> -void free_ep_req(struct usb_ep *ep, struct usb_request *req);
>>>> void disable_endpoints(struct usb_composite_dev *cdev,
>>>> struct usb_ep *in, struct usb_ep *out,
>>>> struct usb_ep *iso_in, struct usb_ep *iso_out);
>>>> diff --git a/drivers/usb/gadget/u_f.c b/drivers/usb/gadget/u_f.c
>>>> index c6276f0..f78bd1f 100644
>>>> --- a/drivers/usb/gadget/u_f.c
>>>> +++ b/drivers/usb/gadget/u_f.c
>>>> @@ -14,6 +14,7 @@
>>>> #include <linux/usb/gadget.h>
>>>> #include "u_f.h"
>>>>
>>>> +/* Requests allocated via alloc_ep_req() must be freed by free_ep_req(). */
>>>> struct usb_request *alloc_ep_req(struct usb_ep *ep, int len, int default_len)
>>>> {
>>>> struct usb_request *req;
>>>> @@ -30,3 +31,10 @@ struct usb_request *alloc_ep_req(struct usb_ep *ep, int len, int default_len)
>>>> return req;
>>>> }
>>>> EXPORT_SYMBOL_GPL(alloc_ep_req);
>>>> +
>>>> +void free_ep_req(struct usb_ep *ep, struct usb_request *req)
>>>> +{
>>>> + kfree(req->buf);
>>>> + usb_ep_free_request(ep, req);
>>>> +}
>>>> +EXPORT_SYMBOL_GPL(free_ep_req);
>>>> diff --git a/drivers/usb/gadget/u_f.h b/drivers/usb/gadget/u_f.h
>>>> index 1d5f0eb..2a1a6fb 100644
>>>> --- a/drivers/usb/gadget/u_f.h
>>>> +++ b/drivers/usb/gadget/u_f.h
>>>> @@ -46,7 +46,6 @@ struct usb_ep;
>>>> struct usb_request;
>>>>
>>>> struct usb_request *alloc_ep_req(struct usb_ep *ep, int len, int default_len);
>>>> +void free_ep_req(struct usb_ep *ep, struct usb_request *req);
>>>>
>>>> #endif /* __U_F_H__ */
>>>> -
>>>> -
>>>>
>>>
>>> Isn't it simple enough to be static inline?
>>
>> inline yes. And the compiler will do it automatically. But I can add it
>> for clarity.
>
> No, compiler will never make function inline when you export its symbol.
> To make it inline you should place it in header.
Correct.
I will improve it on next revision.
--
Felipe
next prev parent reply other threads:[~2015-10-27 12:53 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-26 16:55 [PATCH v4 0/7] USB MIDI Gadget improvements and bug fixes Felipe F. Tonello
2015-10-26 16:55 ` [PATCH v4 1/7] usb: gadget: f_midi: Transmit data only when IN ep is enabled Felipe F. Tonello
2015-10-26 22:13 ` Robert Baldyga
2015-10-26 22:49 ` Felipe Tonello
2015-10-27 6:41 ` Robert Baldyga
2015-10-27 9:21 ` Felipe Ferreri Tonello
2015-10-26 16:55 ` [PATCH v4 2/7] usb: gadget: f_midi: remove duplicated code Felipe F. Tonello
2015-10-26 16:55 ` [PATCH v4 3/7] usb: gadget: define free_ep_req as universal function Felipe F. Tonello
2015-10-27 6:53 ` Robert Baldyga
2015-10-27 9:18 ` Felipe Ferreri Tonello
2015-10-27 9:47 ` Robert Baldyga
2015-10-27 12:53 ` Felipe Ferreri Tonello [this message]
2015-10-26 16:55 ` [PATCH v4 4/7] usb: gadget: f_midi: fix leak on failed to enqueue out requests Felipe F. Tonello
2015-10-26 22:23 ` Robert Baldyga
2015-10-26 22:55 ` Felipe Tonello
2015-10-26 16:55 ` [PATCH v4 5/7] usb: gadget: f_midi: set altsettings only for MIDIStreaming interface Felipe F. Tonello
2015-10-26 22:30 ` Robert Baldyga
2015-10-26 22:53 ` Felipe Tonello
2015-10-27 6:47 ` Robert Baldyga
2015-10-27 9:19 ` Felipe Ferreri Tonello
2015-10-26 16:55 ` [PATCH v4 6/7] usb: gadget: gmidi: Cleanup legacy code Felipe F. Tonello
2015-10-26 16:55 ` [PATCH v4 7/7] usb: gadget: f_midi: pre-allocate IN requests Felipe F. Tonello
2015-10-27 14:14 ` [PATCH v4 0/7] USB MIDI Gadget improvements and bug fixes Felipe Ferreri Tonello
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