linux-kernel - [PATCH 3/3] clocksource: timer-ti-dm: switch to platform_get

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Message-Id: <20191215151707.31264-3-tiny.windzz@gmail.com>
Date:   Sun, 15 Dec 2019 15:17:07 +0000
From:   Yangtao Li <tiny.windzz@...il.com>
To:     daniel.lezcano@...aro.org, tglx@...utronix.de
Cc:     linux-kernel@...r.kernel.org, Yangtao Li <tiny.windzz@...il.com>
Subject: [PATCH 3/3] clocksource: timer-ti-dm: switch to platform_get_irq

platform_get_resource(pdev, IORESOURCE_IRQ) is not recommended for
requesting IRQ's resources, as they can be not ready yet. Using
platform_get_irq() instead is preferred for getting IRQ even if it
was not retrieved earlier.

Signed-off-by: Yangtao Li <tiny.windzz@...il.com>
---
 drivers/clocksource/timer-ti-dm.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/timer-ti-dm.c
index aa2ede266edf..bd16efb2740b 100644
--- a/drivers/clocksource/timer-ti-dm.c
+++ b/drivers/clocksource/timer-ti-dm.c
@@ -780,7 +780,6 @@ static int omap_dm_timer_probe(struct platform_device *pdev)
 {
 	unsigned long flags;
 	struct omap_dm_timer *timer;
-	struct resource *irq;
 	struct device *dev = &pdev->dev;
 	const struct dmtimer_platform_data *pdata;
 	int ret;
@@ -796,11 +795,9 @@ static int omap_dm_timer_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
-	irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (unlikely(!irq)) {
-		dev_err(dev, "%s: no IRQ resource.\n", __func__);
-		return -ENODEV;
-	}
+	timer->irq = platform_get_irq(pdev, 0);
+	if (timer->irq < 0)
+		return timer->irq;
 
 	timer = devm_kzalloc(dev, sizeof(*timer), GFP_KERNEL);
 	if (!timer)
@@ -830,7 +827,6 @@ static int omap_dm_timer_probe(struct platform_device *pdev)
 	if (pdata)
 		timer->errata = pdata->timer_errata;
 
-	timer->irq = irq->start;
 	timer->pdev = pdev;
 
 	pm_runtime_enable(dev);
-- 
2.17.1