From: Felipe Balbi <balbi@ti.com>
To: "Du, Changbin" <changbin.du@intel.com>
Cc: "gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
"John.Youn@synopsys.com" <John.Youn@synopsys.com>,
"linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"lkp@01.org" <lkp@01.org>,
"Wu, Fengguang" <fengguang.wu@intel.com>
Subject: RE: [PATCH v2] usb: gadget: forbid queuing request to a disabled ep
Date: Wed, 16 Dec 2015 10:52:10 -0600 [thread overview]
Message-ID: <87h9jifi9x.fsf@saruman.tx.rr.com> (raw)
In-Reply-To: <0C18FE92A7765D4EB9EE5D38D86A563A01DF62CC@SHSMSX103.ccr.corp.intel.com>
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Hi,
"Du, Changbin" <changbin.du@intel.com> writes:
>> diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
>> index 3d583a1..b566a4b 100644
>> --- a/include/linux/usb/gadget.h
>> +++ b/include/linux/usb/gadget.h
>> @@ -402,6 +402,9 @@ static inline void usb_ep_free_request(struct usb_ep
>> *ep,
>> static inline int usb_ep_queue(struct usb_ep *ep,
>> struct usb_request *req, gfp_t gfp_flags)
>> {
>> + if (WARN_ON_ONCE(!ep->enabled))
>> + return -ESHUTDOWN;
>> +
>> return ep->ops->queue(ep, req, gfp_flags);
>> }
>>
>> --
>> 2.5.0
>
> With this patch, ep0 transfer breaks. it because the 'enabled' of ep0
> is not set. Ep0 is not enabled by usb_ep_enable, but in UDC driver. So
> there need another patch to set ep0's flag also.
yeah, we don't like regressions :-) So the fix should come before
$subject to avoid a regression.
--
balbi
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next prev parent reply other threads:[~2015-12-16 16:52 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-30 5:21 [PATCH 0/2] Two fix for dwc2 gadget driver changbin.du
2015-11-30 5:21 ` [PATCH 1/2] usb: dwc2: add ep enabled flag to avoid double enable/disable changbin.du
2015-12-10 17:26 ` Felipe Balbi
2015-12-14 3:23 ` Du, Changbin
2015-11-30 5:21 ` [PATCH 2/2] usb: dwc2: forbid queuing request to a disabled ep changbin.du
2015-12-10 17:27 ` Felipe Balbi
2015-12-03 1:20 ` [PATCH 0/2] Two fix for dwc2 gadget driver John Youn
2015-12-03 4:23 ` Du, Changbin
2015-12-04 7:21 ` [PATCH] usb: gadget: forbid queuing request to a disabled ep changbin.du
2015-12-10 17:28 ` Felipe Balbi
2015-12-14 3:48 ` [PATCH v2] " changbin.du
2015-12-14 10:20 ` Du, Changbin
2015-12-16 16:52 ` Felipe Balbi [this message]
2015-12-17 9:35 ` Du, Changbin
2015-12-17 10:00 ` [PATCH v3] " changbin.du
2015-12-17 15:26 ` Felipe Balbi
2015-12-18 7:34 ` Du, Changbin
2015-12-18 7:36 ` [PATCH v4] " changbin.du
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