linux-kernel - [PATCH] drivers/perf: hisi: Set correct IRQ affinity for PMUs with no association

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Message-ID: <20241223125134.57885-1-yangyicong@huawei.com>
Date: Mon, 23 Dec 2024 20:51:34 +0800
From: Yicong Yang <yangyicong@...wei.com>
To: <will@...nel.org>, <mark.rutland@....com>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
CC: <jonathan.cameron@...wei.com>, <prime.zeng@...ilicon.com>,
	<linuxarm@...wei.com>, <yangyicong@...ilicon.com>
Subject: [PATCH] drivers/perf: hisi: Set correct IRQ affinity for PMUs with no association

From: Yicong Yang <yangyicong@...ilicon.com>

For PMUs with no association, the hisi_pmu->on_cpu is initialized
according to the NUMA locality but use a wrong CPU for the interrupt
affinity. The CPU selected from cpumask_local_spread() can be different
from the CPU by the cpuhp callback. Fix this by setting the IRQ affinity
to hisi_pmu->on_cpu.

Fixes: 6cd137088fdf ("drivers/perf: hisi: Refactor the detection of associated CPUs")
Signed-off-by: Yicong Yang <yangyicong@...ilicon.com>
---
 drivers/perf/hisilicon/hisi_uncore_pmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pmu.c
index 83bdc9c31367..ef058b1dd509 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_pmu.c
@@ -510,7 +510,7 @@ int hisi_uncore_pmu_online_cpu(unsigned int cpu, struct hlist_node *node)
 			return 0;
 
 		hisi_pmu->on_cpu = cpumask_local_spread(0, dev_to_node(hisi_pmu->dev));
-		WARN_ON(irq_set_affinity(hisi_pmu->irq, cpumask_of(cpu)));
+		WARN_ON(irq_set_affinity(hisi_pmu->irq, cpumask_of(hisi_pmu->on_cpu)));
 		return 0;
 	}
 
-- 
2.24.0