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From: "Ghannam, Yazen" <Yazen.Ghannam@amd.com>
To: Borislav Petkov <bp@alien8.de>
Cc: Adam Borowski <kilobyte@angband.pl>,
	"linux-edac@vger.kernel.org" <linux-edac@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH v3 0/8] AMD64 EDAC fixes
Date: Mon, 26 Aug 2019 14:19:18 +0000
Message-ID: <SN6PR12MB2639E02109E30165D4A37D8AF8A10@SN6PR12MB2639.namprd12.prod.outlook.com> (raw)
In-Reply-To: <20190823153739.GC28379@zn.tnic>

> -----Original Message-----
> From: linux-edac-owner@vger.kernel.org <linux-edac-owner@vger.kernel.org> On Behalf Of Borislav Petkov
> Sent: Friday, August 23, 2019 10:38 AM
> To: Ghannam, Yazen <Yazen.Ghannam@amd.com>
> Cc: Adam Borowski <kilobyte@angband.pl>; linux-edac@vger.kernel.org; linux-kernel@vger.kernel.org
> Subject: Re: [PATCH v3 0/8] AMD64 EDAC fixes
> 
> On Fri, Aug 23, 2019 at 03:28:59PM +0000, Ghannam, Yazen wrote:
> > Boris, Do you think it'd be appropriate to change the return values
> > for some cases?
> >
> > For example, ECC disabled is a hardware configuration. This doesn't
> > mean that the module failed any operations in this case.
> >
> > In other words, the module checks for a feature. If the feature is not
> > present, then return without failure (and maybe give a message).
> 
> That makes sense but AFAICT if probe_one_instance() sees that ECC is not
> enabled, it returns 0.
> 
> The "if (!edac_has_mcs())" check later is to verify that at least once
> instance was loaded successfully and, if not, then return an error.
> 
> So where does it return failure?
> 

I was tracking down the failure with ECC disabled, and that seems to be it.

So I think we should return 0 "if (!edac_has_mcs())", because we'd only get
there if ECC is disabled on all nodes and there wasn't some other initialization
error.

I'll send a patch for this soon.

Adam, would you mind testing this patch?

Thanks,
Yazen

  reply index

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-21 23:59 Ghannam, Yazen
2019-08-21 23:59 ` [PATCH v3 1/8] EDAC/amd64: Support more than two controllers for chip selects handling Ghannam, Yazen
2019-08-21 23:59 ` [PATCH v3 2/8] EDAC/amd64: Recognize DRAM device type with EDAC_CTL_CAP Ghannam, Yazen
2019-08-21 23:59 ` [PATCH v3 3/8] EDAC/amd64: Initialize DIMM info for systems with more than two channels Ghannam, Yazen
2019-08-21 23:59 ` [PATCH v3 4/8] EDAC/amd64: Find Chip Select memory size using Address Mask Ghannam, Yazen
2019-08-22  0:00 ` [PATCH v3 5/8] EDAC/amd64: Decode syndrome before translating address Ghannam, Yazen
2019-08-22  0:00 ` [PATCH v3 6/8] EDAC/amd64: Cache secondary Chip Select registers Ghannam, Yazen
2019-08-22  0:00 ` [RFC PATCH v3 08/10] EDAC/amd64: Gather hardware information early Ghannam, Yazen
2019-08-29  9:22   ` Borislav Petkov
2019-09-06 19:14     ` Ghannam, Yazen
2019-09-06 20:35       ` Borislav Petkov
2019-09-06 20:49         ` Ghannam, Yazen
2019-09-09 15:31           ` Borislav Petkov
2019-08-22  0:00 ` [PATCH v3 7/8] EDAC/amd64: Support Asymmetric Dual-Rank DIMMs Ghannam, Yazen
2019-08-23 11:26   ` Borislav Petkov
2019-08-23 13:27     ` Ghannam, Yazen
2019-08-23 15:11       ` Borislav Petkov
2019-08-22  0:00 ` [RFC PATCH v3 10/10] EDAC/amd64: Check for memory before fully initializing an instance Ghannam, Yazen
2019-08-22 18:51   ` [RFC PATCH v2] " Ghannam, Yazen
2019-08-22  0:00 ` [RFC PATCH v3 09/10] EDAC/amd64: Use cached data when checking for ECC Ghannam, Yazen
2019-08-22  0:50 ` [PATCH v3 0/8] AMD64 EDAC fixes Adam Borowski
2019-08-22  8:35   ` Borislav Petkov
2019-08-22  9:46     ` Adam Borowski
2019-08-22  9:55       ` Borislav Petkov
2019-08-22 18:54   ` Ghannam, Yazen
2019-08-23 15:28     ` Ghannam, Yazen
2019-08-23 15:37       ` Borislav Petkov
2019-08-26 14:19         ` Ghannam, Yazen [this message]
2019-08-26 14:59           ` Borislav Petkov
2019-08-26 15:05             ` Ghannam, Yazen
2019-08-22 18:48 ` [RFC PATCH v2] EDAC/amd64: Check for memory before fully initializing an instance Ghannam, Yazen

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