From: Henry Lin <henryl@nvidia.com>
To: Peter Chen <peter.chen@nxp.com>
Cc: Felipe Balbi <balbi@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Romain Izard <romain.izard.pro@gmail.com>,
"linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
EJ Hsu <ejh@nvidia.com>
Subject: Re: [PATCH] usb: gadget: f_ncm: fix wrong usb_ep
Date: Thu, 28 Nov 2019 09:21:08 +0000 [thread overview]
Message-ID: <MN2PR12MB3389A88286B9A8348596F947AC470@MN2PR12MB3389.namprd12.prod.outlook.com> (raw)
In-Reply-To: <VI1PR04MB532730D2E1BA4108B37155D08B440@VI1PR04MB5327.eurprd04.prod.outlook.com>
>> >Does your UDC driver call composite_disconnect when disconnect from the host?
>> >It should set all desc to NULL at related function ->disable.
>>
>> For ECM case, if ecm_set_alt() gets called with alt == 0, in_ep->desc and out_ep-
>> >desc will be set up. But these two ep will not be enabled as gether_connect() is not
>> executed. During disconnect from the host, ecm_disable() gets called with ep
>> disabled. In this case, gether_disconnect() will not get called to set desc to NULL.
>Would you please share your test case? I use Linux host, and the host will always set alt for 1,
>and doesn't have this issue.
Using Windows host (without any proprietary NCM/ECM driver installed) can reproduce set alt
to 0. We just used Win10 to confirm this.
next prev parent reply other threads:[~2019-11-28 9:22 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-21 4:18 [PATCH] usb: gadget: f_ncm: fix wrong usb_ep Henry Lin
2019-11-25 4:20 ` Peter Chen
2019-11-26 7:26 ` Henry Lin
2019-11-26 7:55 ` Peter Chen
2019-11-26 10:03 ` Henry Lin
2019-11-27 1:54 ` Peter Chen
2019-11-28 9:21 ` Henry Lin [this message]
2019-11-28 9:28 ` Peter Chen
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