From: Elina Pasheva <epasheva@sierrawireless.com>
Date: Mon, 15 Feb 2010 22:50:14 +0000 (-0800)
Subject: USB: serial: sierra driver indat_callback fix
X-Git-Tag: v2.6.34-rc1~215^2~26
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b87c6e86dac1bb5222279cc8ff7e09529e1c4ed9;p=pandora-kernel.git

USB: serial: sierra driver indat_callback fix

A crash has been reported with sierra driver on disconnect with
Ubuntu/Lucid distribution based on kernel-2.6.32.
The cause of the crash was determined as "NULL tty pointer was being
referenced" and the NULL pointer was passed by sierra_indat_callback().

This patch modifies sierra_indat_callback() function to check for NULL
tty structure pointer. This modification prevents a crash from happening
when the device is disconnected.

This patch fixes the bug reported in Launchpad:
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/511157

Signed-off-by: Elina Pasheva <epasheva@sierrawireless.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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