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Date:   Wed, 18 Mar 2020 20:57:05 +0000
From:   Will Deacon <will@kernel.org>
To:     Tuan Phan <tuanphan@os.amperecomputing.com>
Cc:     patches@amperecomputing.com, Mark Rutland <mark.rutland@arm.com>,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        suzuki.poulose@arm.com
Subject: Re: [PATCH 1/2] perf: dsu: Allow multiple devices share same IRQ.
Message-ID: <20200318205704.GC8094@willie-the-truck>
References: <1584491176-31358-1-git-send-email-tuanphan@os.amperecomputing.com>
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[+Suzuki, since he wrote the driver]

On Tue, Mar 17, 2020 at 05:26:15PM -0700, Tuan Phan wrote:
> Add IRQF_SHARED flag when register IRQ such that multiple dsu
> devices can share same IRQ.
> 
> Signed-off-by: Tuan Phan <tuanphan@os.amperecomputing.com>
> ---
>  drivers/perf/arm_dsu_pmu.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/perf/arm_dsu_pmu.c b/drivers/perf/arm_dsu_pmu.c
> index 70968c8..2622900 100644
> --- a/drivers/perf/arm_dsu_pmu.c
> +++ b/drivers/perf/arm_dsu_pmu.c
> @@ -700,7 +700,7 @@ static int dsu_pmu_device_probe(struct platform_device *pdev)
>  	if (!name)
>  		return -ENOMEM;
>  	rc = devm_request_irq(&pdev->dev, irq, dsu_pmu_handle_irq,
> -			      IRQF_NOBALANCING, name, dsu_pmu);
> +			      IRQF_NOBALANCING | IRQF_SHARED, name, dsu_pmu);
>  	if (rc) {
>  		dev_warn(&pdev->dev, "Failed to request IRQ %d\n", irq);
>  		return rc;
> -- 
> 2.7.4
>