linux-kernel - [PATCH v9 6/8] arm_pmu: Use of_cpu_node_to

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Date:   Tue, 31 Oct 2017 17:23:16 +0000
From:   Suzuki K Poulose <suzuki.poulose@....com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, marc.zyngier@....com,
        mark.rutland@....com, will.deacon@....com, catalin.marinas@....com,
        robh@...nel.org, sudeep.holla@....com, peterz@...radead.org,
        mathieu.poirier@...aro.org, leo.yan@...aro.org,
        frowand.list@...il.com, Jonathan.Cameron@...wei.com,
        devicetree@...r.kernel.org,
        Suzuki K Poulose <suzuki.poulose@....com>
Subject: [PATCH v9 6/8] 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@....com>
Acked-by: Mark Rutland <mark.rutland@....com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@....com>
---
 drivers/perf/arm_pmu_platform.c | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/drivers/perf/arm_pmu_platform.c b/drivers/perf/arm_pmu_platform.c
index 4eafa7a42e52..a96884e37eaf 100644
--- a/drivers/perf/arm_pmu_platform.c
+++ b/drivers/perf/arm_pmu_platform.c
@@ -81,19 +81,10 @@ 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);
-- 
2.13.6