linux-kernel - Re: [PATCH] Fix data loss in cdc-acm

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Message-ID: <1437554428.5445.0.camel@suse.com>
Date:	Wed, 22 Jul 2015 10:40:28 +0200
From:	Oliver Neukum <oneukum@...e.com>
To:	Peter Hurley <peter@...leysoftware.com>
Cc:	Sven Brauch <mail@...nbrauch.de>, Johan Hovold <johan@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Toby Gray <toby.gray@...lvnc.com>, linux-usb@...r.kernel.org,
	linux-serial@...r.kernel.org
Subject: Re: [PATCH] Fix data loss in cdc-acm

On Tue, 2015-07-21 at 12:45 -0400, Peter Hurley wrote:
> Let me know if you need help instrumenting the tty buffers/throttling
> to help figure out what the actual problem is.
> 
> Regarding the patch itself, I have no opinion on the suitability of
> simply not resubmitting urbs. However, that is exactly how the
> throttle
> mechanism works, and the tty buffer API is specifically designed to
> allow drivers to manage flow via that interface as well (especially
> for high-throughput drivers).

Could you please expand on how this is supposed to work?
For once how does one learn that room is available again?

	Regards
		Oliver


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