linux-kernel - Re: [PATCH v2] genirq/timings: Fix error return code in irq_timings_test

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Message-ID: <da85194b-34d1-25b7-3319-e98f52a52be5@linaro.org>
Date:   Fri, 13 Aug 2021 20:32:39 +0200
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Zhen Lei <thunder.leizhen@...wei.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] genirq/timings: Fix error return code in
 irq_timings_test_irqs()

On 11/08/2021 11:33, Zhen Lei wrote:
> Fix to return a negative error code from the error handling case instead
> of 0, as done elsewhere in this function.
> 
> Fixes: f52da98d900e ("genirq/timings: Add selftest for irqs circular buffer")
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: Zhen Lei <thunder.leizhen@...wei.com>

Acked-by: Daniel Lezcano <daniel.lezcano@...aro.org>

> ---
>  kernel/irq/timings.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> v1 --> v2:
> Replace -EFAULT with two more appropriate error codes.
> 
> diff --git a/kernel/irq/timings.c b/kernel/irq/timings.c
> index d309d6fbf5bd..59affb3bfdfa 100644
> --- a/kernel/irq/timings.c
> +++ b/kernel/irq/timings.c
> @@ -794,12 +794,14 @@ static int __init irq_timings_test_irqs(struct timings_intervals *ti)
>  
>  		__irq_timings_store(irq, irqs, ti->intervals[i]);
>  		if (irqs->circ_timings[i & IRQ_TIMINGS_MASK] != index) {
> +			ret = -EBADSLT;
>  			pr_err("Failed to store in the circular buffer\n");
>  			goto out;
>  		}
>  	}
>  
>  	if (irqs->count != ti->count) {
> +		ret = -ERANGE;
>  		pr_err("Count differs\n");
>  		goto out;
>  	}
> 


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