Reuse the new generic helper, of_cpu_node_to_id() to map a
given CPU phandle to a logical CPU number.

Cc: Leo Yan <leo....@linaro.org>
Acked-by: Mathieu Poirier <mathieu.poir...@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poul...@arm.com>
---
Changes since V3:
 - Reflect the renaming of the helper and return value changes
---
 drivers/hwtracing/coresight/of_coresight.c | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/drivers/hwtracing/coresight/of_coresight.c 
b/drivers/hwtracing/coresight/of_coresight.c
index a187941..14ca13b 100644
--- a/drivers/hwtracing/coresight/of_coresight.c
+++ b/drivers/hwtracing/coresight/of_coresight.c
@@ -104,26 +104,17 @@ static int of_coresight_alloc_memory(struct device *dev,
 int of_coresight_get_cpu(const struct device_node *node)
 {
        int cpu;
-       bool found;
-       struct device_node *dn, *np;
+       struct device_node *dn;
 
        dn = of_parse_phandle(node, "cpu", 0);
-
        /* Affinity defaults to CPU0 */
        if (!dn)
                return 0;
-
-       for_each_possible_cpu(cpu) {
-               np = of_cpu_device_node_get(cpu);
-               found = (dn == np);
-               of_node_put(np);
-               if (found)
-                       break;
-       }
+       cpu = of_cpu_node_to_id(dn);
        of_node_put(dn);
 
        /* Affinity to CPU0 if no cpu nodes are found */
-       return found ? cpu : 0;
+       return (cpu < 0) 0 : cpu;
 }
 EXPORT_SYMBOL_GPL(of_coresight_get_cpu);
 
-- 
2.7.5

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