linux-kernel - [PATCH] driver-core: platform: Avoid to return IRQ 0 in platform_get

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Message-Id: <fd6dac9b18d2ce37998901dc074c61b94e523969.1512497067.git.arvind.yadav.cs@gmail.com>
Date:   Tue,  5 Dec 2017 23:41:52 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     gregkh@...uxfoundation.org, davem@...emloft.net,
        dmitry.torokhov@...il.com, linus.walleij@...aro.org
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH] driver-core: platform: Avoid to return IRQ 0 in platform_get_irq()

Function platform_get_irq() can return 0. Which means NO_IRQ.
So this change will not allow to return 0.

This change is help to use platform_get_irq() without this,

	val = platform_get_irq();
	if (val <= 0)
		ret = val ? val : -ENODEV;

Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>
---
 drivers/base/platform.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index c203fb9..7b3079c 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -127,7 +127,7 @@ int platform_get_irq(struct platform_device *dev, unsigned int num)
 		irqd_set_trigger_type(irqd, r->flags & IORESOURCE_BITS);
 	}
 
-	return r ? r->start : -ENXIO;
+	return r && r->start ? r->start : -ENXIO;
 #endif
 }
 EXPORT_SYMBOL_GPL(platform_get_irq);
-- 
2.7.4