linux-kernel - Re: [PATCH] perf/smmuv3: Remove the leftover put

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Date:   Tue, 10 Dec 2019 11:04:36 +0000
From:   Robin Murphy <robin.murphy@....com>
To:     Hanjun Guo <guohanjun@...wei.com>,
        Mark Rutland <mark.rutland@....com>,
        Will Deacon <will@...nel.org>
Cc:     Shameer Kolothum <shameerali.kolothum.thodi@...wei.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf/smmuv3: Remove the leftover put_cpu() in error path

On 10/12/2019 10:46 am, Hanjun Guo wrote:
> In smmu_pmu_probe(), there is put_cpu() in the error path,
> which is wrong because we use raw_smp_processor_id() to
> get the cpu ID, not get_cpu(), remove it.

Bah, somehow that slipped through the last round of review :)

Acked-by: Robin Murphy <robin.murphy@....com>

> Signed-off-by: Hanjun Guo <guohanjun@...wei.com>
> ---
>   drivers/perf/arm_smmuv3_pmu.c | 1 -
>   1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/perf/arm_smmuv3_pmu.c b/drivers/perf/arm_smmuv3_pmu.c
> index 773128f..fd1d46a 100644
> --- a/drivers/perf/arm_smmuv3_pmu.c
> +++ b/drivers/perf/arm_smmuv3_pmu.c
> @@ -834,7 +834,6 @@ static int smmu_pmu_probe(struct platform_device *pdev)
>   out_unregister:
>   	cpuhp_state_remove_instance_nocalls(cpuhp_state_num, &smmu_pmu->node);
>   out_cpuhp_err:
> -	put_cpu();
>   	return err;
>   }
>   
>