linux-kernel - Re: [PATCH] USB: cdc-acm: fix broken runtime suspend

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Message-ID: <1397550919.3307.39.camel@linux-fkkt.site>
Date:	Tue, 15 Apr 2014 10:35:19 +0200
From:	Oliver Neukum <oneukum@...e.de>
To:	Johan Hovold <jhovold@...il.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jslaby@...e.cz>, linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org, Peter Hurley <peter@...leysoftware.com>,
	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Xiao Jin <jin.xiao@...el.com>, david.a.cohen@...ux.intel.com,
	yanmin.zhang@...el.com
Subject: Re: [PATCH] USB: cdc-acm: fix broken runtime suspend

On Mon, 2014-04-14 at 21:58 +0200, Johan Hovold wrote:

> Fix this by implementing a delayed-write queue using urb anchors and
> making sure to discard the queue properly at shutdown.

Looks very good, with one exception: acm_tty_close() must
synchronously resume the device so that the anchor is emptied
before ASYNCB is cleared.

	Regards
		Oliver


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