linux-kernel - Re: [PATCH]: sound: ioremap/iounmap function balancing audit

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Date:	Tue, 31 Jul 2007 21:52:26 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	postfail@...hmail.com
Cc:	<kernel-janitors@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-sound@...r.kernel.org>
Subject: Re: [PATCH]:  sound: ioremap/iounmap function balancing audit

On Wed, 01 Aug 2007 00:05:59 -0400 "Scott Thompson" <postfail@...hmail.com> wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1

You might want to consider losing that stuff when sending patches - it just
makes things harder.

> This patch, along with previously submitted dmasound_awacs.c patch,
> completes an audit of the 'sound' tree for ioremap/iounmap
> balancing and return code checking on ioremap calls.  ioremap()
> must be balanced by an iounmap() (else this causes a memory leak).
> 
> i810_audio.c had a 'fixme' issue regarding ioremap fail that was
> addressed as well.
> 
> Signed-off-by: Scott Thompson <postfail <at> hushmail.com>
> - ---
> 
> diff --git a/sound/oss/i810_audio.c b/sound/oss/i810_audio.c
> index f5e31f1..407958c 100644
> - --- a/sound/oss/i810_audio.c
> +++ b/sound/oss/i810_audio.c
> @@ -3362,7 +3362,7 @@ static int __devinit i810_probe(struct
> pci_dev *pci_dev, const struct pci_device
> 
>  	if (card->use_mmio) {
>  		if (request_mem_region(card->ac97base_mmio_phys, 512, "ich_audio
> MMBAR")) {
> - -			if ((card->ac97base_mmio = ioremap(card->ac97base_mmio_phys,
> 512))) { /*@...ME can ioremap fail? don't know (jsaw) */
> +			if ((card->ac97base_mmio = ioremap(card->ac97base_mmio_phys,
> 512))) {
>  				if (request_mem_region(card->iobase_mmio_phys, 256, "ich_audio
> MBBAR")) {
>  					if ((card->iobase_mmio = ioremap(card->iobase_mmio_phys,
> 256))) {
>  						printk(KERN_INFO "i810: %s mmio at 0x%04lx and 0x%04lx\n",

The patch is terribly wordwrapped.

I suspect a lot of the code which you're fixing is about to be removed. 
But I suppose we should fix it before removing it anwyay.  Still, please
split this patch into at least one for sound/oss and one for sound/soc and
sound/pci, thanks.

-
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