From: Felipe Balbi <balbi@kernel.org>
To: Lipengcheng <lpc.li@hisilicon.com>, Peter Chen <hzpeterchen@gmail.com>
Cc: "gregkh\@linuxfoundation.org" <gregkh@linuxfoundation.org>,
"linux-usb\@vger.kernel.org" <linux-usb@vger.kernel.org>,
"linux-kernel\@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: USB GADGET: have a question about usb2eth
Date: Mon, 17 Oct 2016 12:28:42 +0300 [thread overview]
Message-ID: <87y41ns4s5.fsf@linux.intel.com> (raw)
In-Reply-To: <637796ED17F7774FB27D6AAE3C6951584A949CBB@SZXEMA509-MBS.china.huawei.com>
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Hi,
(please, avoid top-posting: http://daringfireball.net/2007/07/on_top)
Lipengcheng <lpc.li@hisilicon.com> writes:
> Hi,
> thank you for your suggestion.
>
> I have a question about usb2eth. In the function gen_ndis_set_resp
> of the rndis.c, the value of *params->filter may be 0x20 from the
> pc set command; Howerver the value is used cdc_filter =
> dev->port_usb->cdc_filter in the function eth_start_xmit of the u_ether.c.
> If we do not judge the RNDIS_PACKET_TYPE_PROMISCUOUS and the value is
> 0x20, the broadcast packet can not send the pc win7; At the result,
> the linux ping the win7 is slow an the first. At the same time, Why are
> different value between RNDIS_PACKET_TYPE_PROMISCUOUS and
> USB_CDC_PACKET_TYPE_PROMISCUOUS? If the value of RNDIS_PACKET_TYPE_PROMISCUOUS
because they are defined by different specifications. You should read
both CDC specification from USB.org and RNDIS spec from Microsoft to
understand the details of that.
> and USB_CDC_PACKET_TYPE_PROMISCUOUS is same, then the linux ping the win7 is
> normal speed.
I don't understand what's going on here. Care to describe which kernel
you're using, which USB peripheral controller, what is the actual
problem you're trying to solve?
--
balbi
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next prev parent reply other threads:[~2016-10-17 9:29 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-15 9:19 USB GADGET: have a question about usb2eth Lipengcheng
2016-10-17 1:56 ` Peter Chen
2016-10-17 6:50 ` Lipengcheng
2016-10-17 9:28 ` Felipe Balbi [this message]
2016-10-18 3:21 ` Lipengcheng
2016-10-18 7:14 ` Felipe Balbi
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