linux-kernel - [PATCH v3 3/5] soc: mediatek: pwrap: Move and check return value of platform_get

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Date:   Mon, 16 May 2022 14:46:57 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     matthias.bgg@...il.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,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Subject: [PATCH v3 3/5] soc: mediatek: pwrap: Move and check return value of platform_get_irq()

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: Nícolas F. R. A. Prado <nfraprado@...labora.com>
Tested-by: Nícolas 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);
 	ret = devm_request_irq(wrp->dev, irq, pwrap_interrupt,
 			       IRQF_TRIGGER_HIGH,
 			       "mt-pmic-pwrap", wrp);
-- 
2.35.1