netdev - Re: [RFC] net: usbnet: prevent buggy devices from killing us

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Message-ID: <877gn2hlkh.fsf@nemi.mork.no>
Date:	Thu, 24 Jan 2013 12:22:54 +0100
From:	Bjørn Mork <bjorn@...k.no>
To:	Oliver Neukum <oneukum@...e.de>
Cc:	linux-usb@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [RFC] net: usbnet: prevent buggy devices from killing us

Oliver Neukum <oneukum@...e.de> writes:

> On Thursday 24 January 2013 11:52:22 Bjørn Mork wrote:
>> Oliver Neukum <oneukum@...e.de> writes:
>> 
>> > On Thursday 24 January 2013 11:25:52 Bjørn Mork wrote:
>> >> The MBIM firmware for the Sierra Wireless MC7710 is a nice source
>> >> of "interesting" device issues.  One of the uglier ones is that
>> >> it under certain conditions will start flooding us with frames
>> >> having length 0 as fast as it can.  And that is pretty fast...
>> >
>> > If you can tell that those frames are bogus, why not count them
>> > as opposed to generic qlen? Say, if you see 20 among the last 30
>> > are of this type, throttle.
>> 
>> Sounds like a good idea, but where do I add/get that statistics?
>
> rx_complete
>
> It need not be very accurate.

Sorry for being daft, but how do I code the "20 among the last 30" part
there?


Bjørn
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