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

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Message-ID: <20100729104006.GA28465@albatros>
Date:	Thu, 29 Jul 2010 14:40:06 +0400
From:	Vasiliy Kulikov <segooon@...il.com>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	Dan Carpenter <error27@...il.com>, kernel-janitors@...r.kernel.org,
	Andrew Veliath <andrewtv@....net>,
	Jaroslav Kysela <perex@...ex.cz>,
	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 Thu, Jul 29, 2010 at 12:22 +0200, Takashi Iwai wrote:
> At Wed, 28 Jul 2010 23:20:31 +0200,
> Dan Carpenter wrote:
> > 
> > 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.
> 
> Agreed.
> 
> Kulikov, could you rewrite the patches with -EBUSY?
No problem, patches are coming.

> 
> 
> thanks,
> 
> Takashi
> 
> > 
> > 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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