Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753271AbeABLZz (ORCPT + 1 other); Tue, 2 Jan 2018 06:25:55 -0500 Received: from foss.arm.com ([217.140.101.70]:37204 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752708AbeABLZx (ORCPT ); Tue, 2 Jan 2018 06:25:53 -0500 From: Suzuki K Poulose To: will.deacon@arm.com Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, robh@kernel.org, mathieu.poirier@linaro.org, leo.yan@linaro.org, peterz@infradead.org, mark.rutland@arm.com, frowand.list@gmail.com, marc.zyngier@arm.com, jonathan.cameron@huawei.com, sudeep.holla@arm.com, Suzuki K Poulose Subject: [PATCH v11 3/8] coresight: of: Use of_cpu_node_to_id helper Date: Tue, 2 Jan 2018 11:25:28 +0000 Message-Id: <20180102112533.13640-4-suzuki.poulose@arm.com> X-Mailer: git-send-email 2.13.6 In-Reply-To: <20180102112533.13640-1-suzuki.poulose@arm.com> References: <20180102112533.13640-1-suzuki.poulose@arm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: Reuse the new generic helper, of_cpu_node_to_id() to map a given CPU phandle to a logical CPU number. Acked-by: Mathieu Poirier Tested-by: Leo Yan 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