From: Kent Yoder <key@linux.vnet.ibm.com>
Date: Fri, 18 Jan 2013 23:42:25 +0000 (-0600)
Subject: tpm_i2c_stm_st33: fix oops when i2c client is unavailable
X-Git-Tag: v3.9-rc1~137^2~17
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1fbc5e95356a4600fab3a04a82dc8bb49591aedd;p=pandora-kernel.git

tpm_i2c_stm_st33: fix oops when i2c client is unavailable

When no i2c bus exists, user-space can cause an oops by triggering a
device probe through a message sent to an i2c "new_device" sysfs entry.
Adding a check for a NULL i2c client structure in the probe function
closes the hole.

This patch also fixes accessing the NULL client struct in the print
function call reporting the error.

Reported-by: Peter Hüwe <PeterHuewe@gmx.de>
Signed-off-by: Kent Yoder <key@linux.vnet.ibm.com>
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