linux-kernel - Re: [PATCH 04/32] perf/hisi-uncore: Assign parents for event

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Date:   Thu, 6 Apr 2023 11:57:30 +0800
From:   Yicong Yang <yangyicong@...wei.com>
To:     Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        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:     <yangyicong@...ilicon.com>, <linuxarm@...wei.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Shaokun Zhang <zhangshaokun@...ilicon.com>,
        Jiucheng Xu <jiucheng.xu@...ogic.com>,
        Khuong Dinh <khuong@...amperecomputing.com>,
        Robert Richter <rric@...nel.org>,
        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: Re: [PATCH 04/32] perf/hisi-uncore: Assign parents for event_source
 devices

On 2023/4/4 21:41, Jonathan Cameron wrote:
> 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@...wei.com>

Reviewed-by: Yicong Yang <yangyicong@...ilicon.com>

> ---
>  drivers/perf/hisilicon/hisi_uncore_pmu.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pmu.c
> index f1b0f5e1a28f..b4350e5dc3fc 100644
> --- a/drivers/perf/hisilicon/hisi_uncore_pmu.c
> +++ b/drivers/perf/hisilicon/hisi_uncore_pmu.c
> @@ -538,6 +538,7 @@ void hisi_pmu_init(struct hisi_pmu *hisi_pmu, const char *name,
>  
>  	pmu->name               = name;
>  	pmu->module             = module;
> +	pmu->parent		= hisi_pmu->dev;
>  	pmu->task_ctx_nr        = perf_invalid_context;
>  	pmu->event_init         = hisi_uncore_pmu_event_init;
>  	pmu->pmu_enable         = hisi_uncore_pmu_enable;
>