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Subject[PATCH v7 3/6] coresight: of: Use of_cpu_node_to_id helper
Date
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.yan@linaro.org>
Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
Changes since V4:
- Fix a regression introduced in v4, reported by bugrobot
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 a18794128bf8..7c375443ede6 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);

--
2.13.6
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