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Message-ID: <ad736290-2e01-f867-d2ec-867a4385005a@gmail.com>
Date: Tue, 17 May 2022 11:18:55 +0200
From: Matthias Brugger <matthias.bgg@...il.com>
To: AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>
Cc: linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
nfraprado@...labora.com, rex-bc.chen@...iatek.com,
zhiyong.tao@...iatek.com
Subject: Re: [PATCH v3 3/5] soc: mediatek: pwrap: Move and check return value
of platform_get_irq()
On 16/05/2022 14:46, AngeloGioacchino Del Regno wrote:
> Move the call to platform_get_irq() earlier in the probe function
> and check for its return value: if no interrupt is specified, it
> wouldn't make sense to try to call devm_request_irq() so, in that
> case, we can simply return early.
>
> Moving the platform_get_irq() call also makes it possible to use
> one less goto, as clocks aren't required at that stage.
>
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> Reviewed-by: NĂcolas F. R. A. Prado <nfraprado@...labora.com>
> Tested-by: NĂcolas F. R. A. Prado <nfraprado@...labora.com>
> ---
> drivers/soc/mediatek/mtk-pmic-wrap.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c b/drivers/soc/mediatek/mtk-pmic-wrap.c
> index 852514366f1f..332cbcabc299 100644
> --- a/drivers/soc/mediatek/mtk-pmic-wrap.c
> +++ b/drivers/soc/mediatek/mtk-pmic-wrap.c
> @@ -2204,6 +2204,10 @@ static int pwrap_probe(struct platform_device *pdev)
> if (!wrp)
> return -ENOMEM;
>
> + irq = platform_get_irq(pdev, 0);
> + if (irq < 0)
> + return irq;
> +
> platform_set_drvdata(pdev, wrp);
>
> wrp->master = of_device_get_match_data(&pdev->dev);
> @@ -2316,7 +2320,6 @@ static int pwrap_probe(struct platform_device *pdev)
> if (HAS_CAP(wrp->master->caps, PWRAP_CAP_INT1_EN))
> pwrap_writel(wrp, wrp->master->int1_en_all, PWRAP_INT1_EN);
>
> - irq = platform_get_irq(pdev, 0);
For better readability of the code I'd prefer to keep platform_get_irq next to
devm_request_irq. I understand that you did this change so that you don't have
to code
if (irq < 0) {
ret = irq;
goto err_out2;
}
Or do I miss something?
Regards,
Matthias
> ret = devm_request_irq(wrp->dev, irq, pwrap_interrupt,
> IRQF_TRIGGER_HIGH,
> "mt-pmic-pwrap", wrp);
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