linux-kernel - Re: [PATCH v2] devfreq: tegra: fix error return code in tegra_devfreq

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Message-ID: <5206e248-a3a7-8cb5-5d8f-a0c84bcb9e40@nvidia.com>
Date:   Tue, 4 Jul 2017 09:35:08 +0100
From:   Jon Hunter <jonathanh@...dia.com>
To:     "Gustavo A. R. Silva" <garsilva@...eddedor.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Thierry Reding <thierry.reding@...il.com>
CC:     <linux-pm@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] devfreq: tegra: fix error return code in
 tegra_devfreq_probe()


On 03/07/17 13:47, Gustavo A. R. Silva wrote:
> platform_get_irq() returns an error code, but the tegra-devfreq
> driver ignores it and always returns -ENODEV. This is not correct,
> and prevents -EPROBE_DEFER from being propagated properly.
> 
> Notice that platform_get_irq() no longer returns 0 on error:
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e330b9a6bb35dc7097a4f02cb1ae7b6f96df92af
> 
> Print and propagate the return value of platform_get_irq on failure.
> 
> Reviewed-by: Chanwoo Choi <cw00.choi@...sung.com>
> Acked-by: MyungJoo Ham <myungjoo.ham@...sung.com>
> Signed-off-by: Gustavo A. R. Silva <garsilva@...eddedor.com>
> ---
> Changes in v2:
>  Rewrite commit message.
> 
>  drivers/devfreq/tegra-devfreq.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/devfreq/tegra-devfreq.c b/drivers/devfreq/tegra-devfreq.c
> index 214fff9..ae71215 100644
> --- a/drivers/devfreq/tegra-devfreq.c
> +++ b/drivers/devfreq/tegra-devfreq.c
> @@ -688,9 +688,9 @@ static int tegra_devfreq_probe(struct platform_device *pdev)
>  	}
>  
>  	irq = platform_get_irq(pdev, 0);
> -	if (irq <= 0) {
> -		dev_err(&pdev->dev, "Failed to get IRQ\n");
> -		return -ENODEV;
> +	if (irq < 0) {
> +		dev_err(&pdev->dev, "Failed to get IRQ: %d\n", irq);
> +		return irq;
>  	}
>  
>  	platform_set_drvdata(pdev, tegra);

Thanks.

Acked-by: Jon Hunter <jonathanh@...dia.com>

Cheers
Jon

-- 
nvpublic