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

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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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Will Deacon 2011-12-02 18:16:01 +01:00 • committed by Russell King

parent de66a97901

commit 6bd054096d

1 changed files with 3 additions and 0 deletions

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arch/arm/kernel/perf_event.c

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