arm_pmu: Use of_cpu_node_to_id helper

Use the new generic helper, of_cpu_node_to_id(), to map a
a phandle to the logical CPU number while parsing the
PMU irq affinity.

Cc: Will Deacon <will.deacon@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

diff --git a/drivers/perf/arm_pmu_platform.c b/drivers/perf/arm_pmu_platform.c
index 91b224e..46501cc 100644 (file)
--- a/drivers/perf/arm_pmu_platform.c
+++ b/drivers/perf/arm_pmu_platform.c
@@ -82,19 +82,10 @@ static int pmu_parse_irq_affinity(struct device_node *node, int i)
                return -EINVAL;
        }
 
-       /* Now look up the logical CPU number */
-       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) {
+       cpu = of_cpu_node_to_id(dn);
+       if (cpu < 0) {
                pr_warn("failed to find logical CPU for %s\n", dn->name);
+               cpu = nr_cpu_ids;
        }
 
        of_node_put(dn);