netdev - CAIF device

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Message-ID: <20100401160916.2a2574f4@lxorguk.ukuu.org.uk>
Date:	Thu, 1 Apr 2010 16:09:16 +0100
From:	Alan <alan@...rguk.ukuu.org.uk>
To:	netdev@...r.kernel.org, sjur.brandeland@...ricsson.com
Subject: CAIF device

I was reading through the CAIF code and I noticed a couple of bugs

Doesn't check there is a write method so set on a read only
device it's not good news (doubly so as there seem to be no
permission checks ?) plus no permissions checks and also the
following which looks unsafe

        dev_close(ser->dev);
        unregister_netdevice(ser->dev);
        list_del(&ser->node);
        debugfs_deinit(ser);

Now ser is the netdev private data so what stops it going away when
unregister_netdev is called ?

Secondly tty devices are ref counted and this for some reason didn't get
fixed in the driver yet.

[Patches to follow for the write and kref bugs, the others need the
authors and someone who knows the netdev code these days to fix]
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