From: Naga Chumbalkar <nagananda.chumbalkar@hp.com>
Date: Wed, 9 Mar 2011 14:02:49 +0000 (+0000)
Subject: pcc-cpufreq: don't load driver if get_freq fails during init.
X-Git-Tag: v2.6.37.4~17
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ace8f4534de7aa5c42b66751832e57eb4cdab7b5;p=pandora-kernel.git

pcc-cpufreq: don't load driver if get_freq fails during init.

commit 1f858ef2fbabdc5e645644010a31a40c32e397c9 upstream.

Return 0 on failure. This will cause the initialization of the driver
to fail and prevent the driver from loading if the BIOS cannot handle
the PCC interface command to "get frequency". Otherwise, the driver
will load and display a very high value like "4294967274" (which is
actually -EINVAL) for frequency:

# cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq
4294967274

Signed-off-by: Naga Chumbalkar <nagananda.chumbalkar@hp.com>
Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

Reading git-diff-tree failed