linux-kernel - Re: [PATCH 1/7] [AVR32] don't check platform_get

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Date:	Tue, 19 Oct 2010 08:45:43 +0200
From:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
To:	linux-kernel@...r.kernel.org
Cc:	David Vrabel <dvrabel@...om.com>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Haavard Skinnemoen <hskinnemoen@...el.com>
Subject: Re: [PATCH 1/7] [AVR32] don't check platform_get_irq's return
	value against zero

On Wed, Dec 16, 2009 at 05:10:03PM +0100, Uwe Kleine-König wrote:
> platform_get_irq returns -ENXIO on failure, so !int_irq was probably
> always true.  Better use (int)int_irq <= 0.  Note that a return value of
> zero is still handled as error even though this could mean irq0.
> 
> This is a followup to 305b3228f9ff4d59f49e6d34a7034d44ee8ce2f0 that
> changed the return value of platform_get_irq from 0 to -ENXIO on error.
> 
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
> Cc: David Vrabel <dvrabel@...om.com>
> Cc: Greg Kroah-Hartman <gregkh@...e.de>
> Cc: Haavard Skinnemoen <hskinnemoen@...el.com>
> ---
>  arch/avr32/mach-at32ap/extint.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/avr32/mach-at32ap/extint.c b/arch/avr32/mach-at32ap/extint.c
> index 310477b..033f693 100644
> --- a/arch/avr32/mach-at32ap/extint.c
> +++ b/arch/avr32/mach-at32ap/extint.c
> @@ -198,7 +198,7 @@ static int __init eic_probe(struct platform_device *pdev)
>  
>  	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>  	int_irq = platform_get_irq(pdev, 0);
> -	if (!regs || !int_irq) {
> +	if (!regs || (int)int_irq <= 0) {
>  		dev_dbg(&pdev->dev, "missing regs and/or irq resource\n");
>  		return -ENXIO;
>  	}
ping

Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
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