From: Yeoreum Yun <yeoreum.yun@arm•com>
To: coresight@lists•linaro.org, linux-arm-kernel@lists•infradead.org,
linux-kernel@vger•kernel.org
Cc: suzuki.poulose@arm•com, mike.leach@arm•com,
james.clark@linaro•org, alexander.shishkin@linux•intel.com,
leo.yan@arm•com, jie.gan@oss•qualcomm.com,
Yeoreum Yun <yeoreum.yun@arm•com>
Subject: [PATCH v7 13/13] coresight: etm3x: remove redundant cpu online check on etm_enable_sysfs()
Date: Tue, 19 May 2026 16:48:12 +0100 [thread overview]
Message-ID: <20260519154812.254884-14-yeoreum.yun@arm.com> (raw)
In-Reply-To: <20260519154812.254884-1-yeoreum.yun@arm.com>
cpu online() check is done in coresight_validate_source_sysfs() already.
Therefore, remove redundant check in etm_enable_sysfs().
Signed-off-by: Yeoreum Yun <yeoreum.yun@arm•com>
---
.../coresight/coresight-etm3x-core.c | 31 ++++++++-----------
1 file changed, 13 insertions(+), 18 deletions(-)
diff --git a/drivers/hwtracing/coresight/coresight-etm3x-core.c b/drivers/hwtracing/coresight/coresight-etm3x-core.c
index ed27e35b42ec..9dbfe6a1dc4d 100644
--- a/drivers/hwtracing/coresight/coresight-etm3x-core.c
+++ b/drivers/hwtracing/coresight/coresight-etm3x-core.c
@@ -520,25 +520,20 @@ static int etm_enable_sysfs(struct coresight_device *csdev, struct coresight_pat
struct etm_enable_arg arg = { };
int ret;
- /*
- * Configure the ETM only if the CPU is online. If it isn't online
- * hw configuration will take place on the local CPU during bring up.
- */
- if (cpu_online(drvdata->cpu)) {
- arg.drvdata = drvdata;
- arg.path = path;
-
- raw_spin_lock(&drvdata->spinlock);
- arg.config = drvdata->config;
- raw_spin_unlock(&drvdata->spinlock);
-
- ret = smp_call_function_single(drvdata->cpu,
- etm_enable_sysfs_smp_call, &arg, 1);
- if (!ret)
- ret = arg.rc;
- } else {
+ arg.drvdata = drvdata;
+ arg.path = path;
+
+ raw_spin_lock(&drvdata->spinlock);
+ arg.config = drvdata->config;
+ raw_spin_unlock(&drvdata->spinlock);
+
+ ret = smp_call_function_single(drvdata->cpu,
+ etm_enable_sysfs_smp_call, &arg, 1);
+
+ if (!ret)
+ ret = arg.rc;
+ else
ret = -ENODEV;
- }
if (!ret)
dev_dbg(&csdev->dev, "ETM tracing enabled\n");
--
LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}
prev parent reply other threads:[~2026-05-19 15:49 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-19 15:47 [PATCH v7 00/13] fix several inconsistencies with sysfs configuration in etmX Yeoreum Yun
2026-05-19 15:48 ` [PATCH v7 01/13] coresight: etm4x: fix wrong check of etm4x_sspcicrn_present() Yeoreum Yun
2026-05-19 15:48 ` [PATCH v7 02/13] coresight: etm4x: fix underflow for nrseqstate Yeoreum Yun
2026-06-01 9:40 ` Suzuki K Poulose
2026-06-01 10:08 ` Yeoreum Yun
2026-06-01 10:13 ` Suzuki K Poulose
2026-06-01 10:15 ` Yeoreum Yun
2026-06-01 9:52 ` Suzuki K Poulose
2026-06-01 10:12 ` Yeoreum Yun
2026-05-19 15:48 ` [PATCH v7 03/13] coresight: etm4x: introduce ETM_MAX_SEQ_TRANSITIONS Yeoreum Yun
2026-05-28 12:58 ` Leo Yan
2026-05-28 13:47 ` Yeoreum Yun
2026-06-01 9:53 ` Suzuki K Poulose
2026-06-01 11:14 ` Yeoreum Yun
2026-05-19 15:48 ` [PATCH v7 04/13] coresight: etm4x: introduce struct etm4_caps Yeoreum Yun
2026-05-19 15:48 ` [PATCH v7 05/13] coresight: etm4x: exclude ss_status from drvdata->config Yeoreum Yun
2026-05-28 13:30 ` Leo Yan
2026-05-28 13:46 ` Yeoreum Yun
2026-06-01 11:27 ` Suzuki K Poulose
2026-06-01 11:52 ` Yeoreum Yun
2026-06-04 9:15 ` Suzuki K Poulose
2026-05-19 15:48 ` [PATCH v7 06/13] coresight: etm4x: remove redundant fields in etmv4_save_state Yeoreum Yun
2026-05-19 15:48 ` [PATCH v7 07/13] coresight: etm4x: fix leaked trace id Yeoreum Yun
2026-05-19 15:48 ` [PATCH v7 08/13] coresight: etm4x: fix inconsistencies with sysfs configuration Yeoreum Yun
2026-05-28 14:09 ` Leo Yan
2026-05-28 14:26 ` Yeoreum Yun
2026-05-28 14:56 ` Leo Yan
2026-05-28 15:22 ` Yeoreum Yun
2026-06-01 15:38 ` Suzuki K Poulose
2026-05-19 15:48 ` [PATCH v7 09/13] coresight: etm4x: missing cscfg_csdev_disable_active_config() in perf enable Yeoreum Yun
2026-05-28 14:33 ` Leo Yan
2026-05-28 14:43 ` Yeoreum Yun
2026-05-28 15:26 ` Leo Yan
2026-05-28 16:01 ` Yeoreum Yun
2026-06-01 16:11 ` Suzuki K Poulose
2026-06-01 16:41 ` Yeoreum Yun
2026-05-19 15:48 ` [PATCH v7 10/13] coresight: etm3x: change drvdata->spinlock type to raw_spin_lock_t Yeoreum Yun
2026-05-19 15:48 ` [PATCH v7 11/13] coresight: etm3x: introduce struct etm_caps Yeoreum Yun
2026-05-19 15:48 ` [PATCH v7 12/13] coresight: etm3x: fix inconsistencies with sysfs configuration Yeoreum Yun
2026-05-19 15:48 ` Yeoreum Yun [this message]
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