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Subject: Re: [PATCH 32/32] hwtracing: hisi_ptt: Assign parent for event_source
 device
To:     Jonathan Cameron <Jonathan.Cameron@huawei.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
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        <gregkh@linuxfoundation.org>
References: <20230404134225.13408-1-Jonathan.Cameron@huawei.com>
 <20230404134225.13408-33-Jonathan.Cameron@huawei.com>
From:   Yicong Yang <yangyicong@huawei.com>
Message-ID: <066e107f-57a0-1277-e391-844e668b6d2a@huawei.com>
Date:   Thu, 6 Apr 2023 11:55:30 +0800
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On 2023/4/4 21:42, 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 PCI device.
> 
> Link: https://lore.kernel.org/linux-cxl/ZCLI9A40PJsyqAmq@kroah.com/
> Cc: Yicong Yang <yangyicong@hisilicon.com>
> Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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

> ---
>  drivers/hwtracing/ptt/hisi_ptt.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/hwtracing/ptt/hisi_ptt.c b/drivers/hwtracing/ptt/hisi_ptt.c
> index 30f1525639b5..3868d43e9e3c 100644
> --- a/drivers/hwtracing/ptt/hisi_ptt.c
> +++ b/drivers/hwtracing/ptt/hisi_ptt.c
> @@ -871,6 +871,7 @@ static int hisi_ptt_register_pmu(struct hisi_ptt *hisi_ptt)
>  
>  	hisi_ptt->hisi_ptt_pmu = (struct pmu) {
>  		.module		= THIS_MODULE,
> +		.parent		= &hisi_ptt->pdev->dev,
>  		.capabilities	= PERF_PMU_CAP_EXCLUSIVE | PERF_PMU_CAP_ITRACE,
>  		.task_ctx_nr	= perf_sw_context,
>  		.attr_groups	= hisi_ptt_pmu_groups,
>