linux-kernel - [PATCH v2 26/30] dmaengine: idxd: Assign parent for event

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Date: Fri, 12 Apr 2024 17:10:53 +0100
From: Jonathan Cameron <Jonathan.Cameron@...wei.com>
To: Mark Rutland <mark.rutland@....com>, Peter Zijlstra
	<peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, Arnaldo Carvalho de
 Melo <acme@...nel.org>, Will Deacon <will@...nel.org>,
	<linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<gregkh@...uxfoundation.org>
CC: <linuxarm@...wei.com>, Shaokun Zhang <zhangshaokun@...ilicon.com>, Yicong
 Yang <yangyicong@...ilicon.com>, Jiucheng Xu <jiucheng.xu@...ogic.com>,
	Khuong Dinh <khuong@...amperecomputing.com>, Atish Patra
	<atishp@...shpatra.org>, Anup Patel <anup@...infault.org>, Andy Gross
	<agross@...nel.org>, Bjorn Andersson <andersson@...nel.org>, Frank Li
	<Frank.li@....com>, Shuai Xue <xueshuai@...ux.alibaba.com>, Vineet Gupta
	<vgupta@...nel.org>, Shawn Guo <shawnguo@...nel.org>, Fenghua Yu
	<fenghua.yu@...el.com>, Dave Jiang <dave.jiang@...el.com>, Wu Hao
	<hao.wu@...el.com>, Tom Rix <trix@...hat.com>, <linux-fpga@...r.kernel.org>,
	Suzuki K Poulose <suzuki.poulose@....com>, Liang Kan
	<kan.liang@...ux.intel.com>
Subject: [PATCH v2 26/30] dmaengine: idxd: Assign parent for event_source device

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 iDXD PCI Device.

Link: https://lore.kernel.org/linux-cxl/ZCLI9A40PJsyqAmq@kroah.com/
Cc: Fenghua Yu <fenghua.yu@...el.com>
Cc: Dave Jiang <dave.jiang@...el.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
---
 drivers/dma/idxd/perfmon.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/dma/idxd/perfmon.c b/drivers/dma/idxd/perfmon.c
index fdda6d604262..fbb586eed0b3 100644
--- a/drivers/dma/idxd/perfmon.c
+++ b/drivers/dma/idxd/perfmon.c
@@ -477,6 +477,7 @@ static void idxd_pmu_init(struct idxd_pmu *idxd_pmu)
 	}
 
 	idxd_pmu->pmu.name		= idxd_pmu->name;
+	idxd_pmu->pmu.parent		= &idxd_pmu->idxd->pdev->dev;
 	idxd_pmu->pmu.attr_groups	= perfmon_attr_groups;
 	idxd_pmu->pmu.task_ctx_nr	= perf_invalid_context;
 	idxd_pmu->pmu.event_init	= perfmon_pmu_event_init;
-- 
2.39.2