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drivers/perf: arm_pmu: avoid CPU device_node reference leak 

of_cpu_device_node_get increments the reference count on the CPU
device_node, so we must take care to of_node_put once we've finished
with it.

This patch fixes the perf IRQ probing code to avoid the leak.

Cc: Sudeep Holla <sudeep.holla@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Will Deacon 2015-10-12 14:48:39 +01:00 committed by Arnd Bergmann
parent a0bcbe969f
commit fb659882cc
1 changed files with 8 additions and 2 deletions
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10
drivers/perf/arm_pmu.c
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@ -823,9 +823,15 @@ static int of_pmu_irq_cfg(struct arm_pmu *pmu)
}
/* Now look up the logical CPU number */
for_each_possible_cpu(cpu)
if (dn == of_cpu_device_node_get(cpu))
for_each_possible_cpu(cpu) {
struct device_node *cpu_dn;
cpu_dn = of_cpu_device_node_get(cpu);
of_node_put(cpu_dn);
if (dn == cpu_dn)
break;
}
if (cpu >= nr_cpu_ids) {
pr_warn("Failed to find logical CPU for %s\n",