netdev - [PATCH] ath9k: Use platform_get_irq() to get the interrupt

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Message-Id: <20220309053521.2081129-1-chi.minghao@zte.com.cn>
Date:   Wed,  9 Mar 2022 05:35:21 +0000
From:   cgel.zte@...il.com
To:     toke@...e.dk
Cc:     kvalo@...nel.org, davem@...emloft.net, kuba@...nel.org,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Minghao Chi <chi.minghao@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: [PATCH] ath9k: Use platform_get_irq() to get the interrupt

From: Minghao Chi <chi.minghao@....com.cn>

It is not recommened to use platform_get_resource(pdev, IORESOURCE_IRQ)
for requesting IRQ's resources any more, as they can be not ready yet in
case of DT-booting.

platform_get_irq() instead is a recommended way for getting IRQ even if
it was not retrieved earlier.

It also makes code simpler because we're getting "int" value right away
and no conversion from resource to int is required.

Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: Minghao Chi <chi.minghao@....com.cn>
---
 drivers/net/wireless/ath/ath9k/ahb.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/ahb.c b/drivers/net/wireless/ath/ath9k/ahb.c
index cdefb8e2daf1..9cd12b20b18d 100644
--- a/drivers/net/wireless/ath/ath9k/ahb.c
+++ b/drivers/net/wireless/ath/ath9k/ahb.c
@@ -98,13 +98,9 @@ static int ath_ahb_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 
-	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (res == NULL) {
-		dev_err(&pdev->dev, "no IRQ resource found\n");
-		return -ENXIO;
-	}
-
-	irq = res->start;
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
 
 	ath9k_fill_chanctx_ops();
 	hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
-- 
2.25.1