From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 9 Sep 2011 23:14:02 +0000 (-0400)
Subject: um: fix races between line_open() and line_config()
X-Git-Tag: v3.4-rc1~81^2~26
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=31efcebb7d7196adcee73027f513d7c0bf572b47;p=pandora-kernel.git

um: fix races between line_open() and line_config()

Pull parse_chan_pair() call into setup_one_line(), under the mutex.
We really don't want open() to succeed before parse_chan_pair() had
been done (or after it has failed, BTW).  We also want "remove con<n>"
to free irqs, etc., same as "config con<n>=none".

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
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