netdev - Re: tty_register_device NULL pointer dereference in 2.6.31-rc4

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Date:	Sat, 25 Jul 2009 13:10:46 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Marcel Holtmann <marcel@...tmann.org>
Cc:	Oliver Hartkopp <oliver@...tkopp.net>,
	Linux Netdev List <netdev@...r.kernel.org>,
	linux-bluetooth@...r.kernel.org
Subject: Re: tty_register_device NULL pointer dereference in 2.6.31-rc4

> > tty_register_device appears to have been called with a NULL pointer. Not
> > sure why however.
> 
> if that is the pointer for the struct device, then that used to be fine
> in the past. Not all RFCOMM device have a parent when they are created.

The tty layer doesn't care about the struct device really. Nothing there
has changed. The NULL passed appears to be the driver argument.
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