linux-kernel - Re: [RFC] cdc-acm: Fix potential deadlock (lockdep warning)

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Message-Id: <201111232034.24280.oliver@neukum.org>
Date:	Wed, 23 Nov 2011 20:34:24 +0100
From:	Oliver Neukum <oliver@...kum.org>
To:	Alan Cox <alan@...ux.intel.com>
Cc:	Havard Skinnemoen <hskinnemoen@...gle.com>,
	Jiri Slaby <jslaby@...e.cz>, Dave Jones <davej@...hat.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	"Greg Kroah-Hartman" <gregkh@...e.de>,
	Jiri Slaby <jirislaby@...il.com>
Subject: Re: [RFC] cdc-acm: Fix potential deadlock (lockdep warning)

Am Mittwoch, 23. November 2011, 20:22:33 schrieb Alan Cox:
> and on the open side they provide their own install() method which
> nicely avoids all the nasty locking problems and lets them use the
> standard tty_port_open/close/hangup etc rather than the partial ones.
> 
> It might be worth turning the ACM driver to work the same way as it'll
> save doing that work later to achieve the same use of
> tty_port_open/close/..
> 
> The main thing is the use of install - which lets you plug the USB and
> tty bits together during the lookup of the device.

Which driver is the best example?

	Regards
		Oliver

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