linux-kernel - RE: [PATCH 1/2] x86/MCE/AMD: Check for NULL banks in THR interrupt handler

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Message-ID: <BN7PR12MB259365671F2A73D5FF33C134F8250@BN7PR12MB2593.namprd12.prod.outlook.com>
Date:   Thu, 9 Aug 2018 18:18:15 +0000
From:   "Ghannam, Yazen" <Yazen.Ghannam@....com>
To:     Borislav Petkov <bp@...en8.de>
CC:     "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "tony.luck@...el.com" <tony.luck@...el.com>,
        "x86@...nel.org" <x86@...nel.org>
Subject: RE: [PATCH 1/2] x86/MCE/AMD: Check for NULL banks in THR interrupt
 handler

> -----Original Message-----
> From: Borislav Petkov <bp@...en8.de>
> Sent: Thursday, August 9, 2018 11:16 AM
> To: Ghannam, Yazen <Yazen.Ghannam@....com>
> Cc: linux-edac@...r.kernel.org; linux-kernel@...r.kernel.org;
> tony.luck@...el.com; x86@...nel.org
> Subject: Re: [PATCH 1/2] x86/MCE/AMD: Check for NULL banks in THR
> interrupt handler
> 
> On Thu, Aug 09, 2018 at 09:08:33AM -0500, Yazen Ghannam wrote:
> > From: Yazen Ghannam <yazen.ghannam@....com>
> >
> > If threshold_init_device() fails then per_cpu(threshold_banks) will be
> > deallocated. The thresholding interrupt handler will still be active, so
> 
> So fix the code so that *that* doesn't happen instead of adding checks
> to the interrupt handler.
> 
> I.e.,
> 
> 	if (err) {
> 		mce_threshold_vector = default_threshold_interrupt;
> 		return err;
> 	}
> 

Okay. I'll make that change.

Thanks,
Yazen