From mboxrd@z Thu Jan 1 00:00:00 1970 From: suzuki.poulose@arm.com (Suzuki K Poulose) Date: Fri, 6 Oct 2017 11:36:07 +0100 Subject: [PATCH v7 3/6] coresight: of: Use of_cpu_node_to_id helper In-Reply-To: <20171006103610.11853-1-suzuki.poulose@arm.com> References: <20171006103610.11853-1-suzuki.poulose@arm.com> Message-ID: <20171006103610.11853-4-suzuki.poulose@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Reuse the new generic helper, of_cpu_node_to_id() to map a given CPU phandle to a logical CPU number. Cc: Leo Yan Acked-by: Mathieu Poirier Signed-off-by: Suzuki K Poulose --- 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