linux-kernel - Re: aperture_64.c: corner case wrong

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Date:	Tue, 3 Jun 2008 15:54:10 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	Pavel Machek <pavel@...e.cz>, linux-kernel@...r.kernel.org,
	mingo@...e.hu, davej@...emonkey.org.uk, andi@...stfloor.org
Subject: Re: aperture_64.c: corner case wrong

On Mon, 2 Jun 2008, Andrew Morton wrote:
> On Mon, 26 May 2008 21:17:30 +0200
> Pavel Machek <pavel@...e.cz> wrote:
> > diff --git a/arch/x86/kernel/aperture_64.c b/arch/x86/kernel/aperture_64.c
> > index 02f4dba..aa4876a 100644
> > --- a/arch/x86/kernel/aperture_64.c
> > +++ b/arch/x86/kernel/aperture_64.c
> > @@ -344,14 +323,16 @@ out:
> >  	if (gart_fix_e820 && !fix && aper_enabled) {
> >  		if (!e820_all_mapped(aper_base, aper_base + aper_size,
> >  				    E820_RESERVED)) {
> >  			/* reserve it, so we can reuse it in second kernel */
> >  			printk(KERN_INFO "update e820 for GART\n");
> >  			add_memory_region(aper_base, aper_size, E820_RESERVED);
> >  			update_e820();
> >  		}
> > -		return;
> >  	}
> >  
> > +	if (!fix)
> > +		return;
> > +
> >  	/* different nodes have different setting, disable them all at first*/
> >  	for (i = 0; i < ARRAY_SIZE(bus_dev_ranges); i++) {
> >  		int bus;
> > 
> 
> So what happened with this?  Thomas has merged an "x86: aperture_64.c:
> cleanups" from yourself but it appears that half of this bugfix got
> applied somewhere and the below part did not?

Err, no. I seem to have dropped the patch completely. I'm picking it
up again.

> diff -puN arch/x86/kernel/aperture_64.c~aperture_64c-corner-case-wrong arch/x86/kernel/aperture_64.c
> --- a/arch/x86/kernel/aperture_64.c~aperture_64c-corner-case-wrong
> +++ a/arch/x86/kernel/aperture_64.c
> @@ -331,6 +331,9 @@ out:
>  		return;

This should be:
-  		return;

right?

>  	}
>  
> +	if (!fix)
> +		return;
> +
>  	/* different nodes have different setting, disable them all at first*/
>  	for (i = 0; i < ARRAY_SIZE(bus_dev_ranges); i++) {
>  		int bus;
> _

Thanks,
	tglx

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