From: Jiri Slaby <jslaby@suse.cz>
Date: Sun, 5 Jun 2011 12:16:17 +0000 (+0200)
Subject: TTY: ntty, add one more sanity check
X-Git-Tag: v3.0-rc6~30^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2872628680bad71a6734e7d379168f990a91cc09;p=pandora-kernel.git

TTY: ntty, add one more sanity check

With the previous patch, we fixed another bug where read_buf was freed
while we still was in n_tty_read. We currently check whether read_buf
is NULL at the start of the function. Add one more check after we wake
up from waiting for input.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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