From: Will Deacon <will.deacon@arm.com>
Date: Fri, 2 Dec 2011 17:16:01 +0000 (+0100)
Subject: ARM: 7185/1: perf: don't assign platform_device on unsupported CPUs
X-Git-Tag: v3.2-rc6~22^2~1
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6bd054096dce061560cee0e016e292e588dc438f;p=pandora-kernel.git

ARM: 7185/1: perf: don't assign platform_device on unsupported CPUs

In the unlikely case that a platform registers a PMU platform_device
when running on a CPU that is unsupported by perf, we will encounter a
NULL dereference when trying to assign the platform_device to the
cpu_pmu structure.

This patch checks that the CPU is supported by perf before assigning
the platform_device.

Reported-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

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