netdev - Re: [PATCH 1/2] usbnet: allow status interrupt URB to always be active

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Message-ID: <2543834.K7XJaOec6G@linux-5eaq.site>
Date:	Mon, 07 Jan 2013 08:40:22 +0100
From:	Oliver Neukum <oliver@...kum.org>
To:	Bjørn Mork <bjorn@...k.no>
Cc:	Dan Williams <dcbw@...hat.com>,
	Elina Pasheva <epasheva@...rrawireless.com>,
	netdev@...r.kernel.org, linux-usb@...r.kernel.org,
	Rory Filer <rfiler@...rrawireless.com>,
	Phil Sutter <phil@....cc>
Subject: Re: [PATCH 1/2] usbnet: allow status interrupt URB to always be active

On Saturday 05 January 2013 11:59:16 Bjørn Mork wrote:

Hi,

> You can still use a trick similar to what qmi_wwan and cdc_mbim does to
> take over the status endpoint from usbnet: By not implementing .status,
> and possibly setting dev->status to NULL in .bind, you are free to
> handle the status endpoint entirely inside the minidriver.  Not sure if
> that is smart though.  You would have to reimplement init_status and
> intr_complete from usbnet, and kill or resubmit the interrupt urb on
> suspend/resume/disconnect yourself.

Please no. We don't look for ways to circumvent frameworks. We alter
frameworks to act as we need them to act.

> The new usbnet flag is probably a better solution.

Indeed.

> FWIW, I agree with Oliver that always submitting the interrupt URB is
> both risky and will cause too much unnecessary USB activity for most
> usbnet devices.

Good.

	Regards
		Oliver

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