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>
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@ -823,9 +823,15 @@ static int of_pmu_irq_cfg(struct arm_pmu *pmu)
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}
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/* Now look up the logical CPU number */
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for_each_possible_cpu(cpu)
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if (dn == of_cpu_device_node_get(cpu))
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for_each_possible_cpu(cpu) {
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struct device_node *cpu_dn;
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cpu_dn = of_cpu_device_node_get(cpu);
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of_node_put(cpu_dn);
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if (dn == cpu_dn)
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break;
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}
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if (cpu >= nr_cpu_ids) {
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pr_warn("Failed to find logical CPU for %s\n",
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