linux-kernel - Re: [PATCH -tip/master] x86: io-apic

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Message-ID: <20080923045637.GA7172@localhost>
Date:	Tue, 23 Sep 2008 08:56:37 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Suresh Siddha <suresh.b.siddha@...el.com>
Cc:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>,
	"Maciej W. Rozycki" <macro@...ux-mips.org>
Subject: Re: [PATCH -tip/master] x86: io-apic - interrupt remapping fix

[Suresh Siddha - Mon, Sep 22, 2008 at 06:16:21PM -0700]
| On Mon, Sep 22, 2008 at 05:57:38PM -0700, Siddha, Suresh B wrote:
| > On Fri, Sep 19, 2008 at 05:33:20AM -0700, Cyrill Gorcunov wrote:
| > > Interrupt remapping could lead to NULL dereference in case of
| > > kzalloc failed and memory leak in other way. So fix the
| > > both cases.
| > >
| > > Signed-off-by: Cyrill Gorcunov <gorcunov@...il.com>
| > > ---
| > >
| > > Ingo, the patch is on top of applied one.
| > >
| > > If I remember correctly Suresh was involved in
| > > this - so I think he could take a look and review
| > > the patch (please).
| > >
| > 
| > Acked-by: Suresh Siddha <suresh.b.siddha@...el.com>
| 
| oops. Cyrill some typo here:
| 
| +       for (; apic > 0; apic--)
| +               kfree(early_ioapic_entries[apic]);
| +       kfree(early_ioapic_entries[apic]);
|

Hi Suresh, thanks for review!

Well it's not typo actually :) Of course it could
be like

	for (--apic; apic > 0; apic--)
or
	for (apic--; apic > 0; apic--)

but it will be a rpoblem in case if apic = 0 and
if someday apic would be unsigned int. So I prefered
to have _one_ kfree(NULL) call instead :)

I hope i didn't miss anything.

		- Cyrill -
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