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Subject: [PATCH 17/32] perf/arm_pmu: Assign parents for event_source devices
Date:   Tue, 4 Apr 2023 14:42:10 +0100
Message-ID: <20230404134225.13408-18-Jonathan.Cameron@huawei.com>
In-Reply-To: <20230404134225.13408-1-Jonathan.Cameron@huawei.com>
References: <20230404134225.13408-1-Jonathan.Cameron@huawei.com>
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Currently the PMU device appears directly under /sys/devices/
Only root busses should appear there, so instead assign the pmu->dev
parent to be the platform device.

Link: https://lore.kernel.org/linux-cxl/ZCLI9A40PJsyqAmq@kroah.com/
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

---
Note that the ACPI path for this driver has no obvious 'parent' to
use so I've left that for now. See armv8_pmu_driver_init() in
arch/arm64/kernel/perf_event.c Suggestions welcome!
---
 drivers/perf/arm_pmu_platform.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/perf/arm_pmu_platform.c b/drivers/perf/arm_pmu_platform.c
index 933b96e243b8..705ed45402ff 100644
--- a/drivers/perf/arm_pmu_platform.c
+++ b/drivers/perf/arm_pmu_platform.c
@@ -197,6 +197,7 @@ int arm_pmu_device_probe(struct platform_device *pdev,
 	if (!pmu)
 		return -ENOMEM;
 
+	pmu->pmu.parent = &pdev->dev;
 	pmu->plat_device = pdev;
 
 	ret = pmu_parse_irqs(pmu);
-- 
2.37.2