linux-kernel - Re: [PATCH 09/10] oss: msnd: check request

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Date:	Wed, 28 Jul 2010 23:20:31 +0200
From:	Dan Carpenter <error27@...il.com>
To:	Kulikov Vasiliy <segooon@...il.com>,
	kernel-janitors@...r.kernel.org, Andrew Veliath <andrewtv@....net>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	Arnd Bergmann <arnd@...db.de>, Tejun Heo <tj@...nel.org>,
	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 09/10] oss: msnd: check request_region() return value

On Wed, Jul 28, 2010 at 10:00:02PM +0200, Dan Carpenter wrote:
> This should be -EBUSY as well.  The same for "[PATCH 06/10] ALSA: msnd: 
> check request_region() return value"
> 
> Another way to write that would be:
> 

Gar.  I was thinking of request_resource().  request_region() returns a
pointer of course.

But still the return code should probably be -EBUSY.  Resource
conflicts are more likely than allocation failures.

regards,
dan carpenter

> -	request_region(dev.io, dev.numio, dev.name);
> +	err = request_region(dev.io, dev.numio, dev.name);
> +	if (err) {
> +		free_irq(dev.irq, &dev);
> +		return err;
> +	}
> 
> regards,
> dan carpenter
> 
> > +	if (request_region(dev.io, dev.numio, dev.name) == NULL) {
> > +		free_irq(dev.irq, &dev);
> > +		return -ENOMEM;
> > +	}
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