linux-kernel - Re: [PATCH v2 4/7] ghes_edac: avoid multiple calls to dmi

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Message-ID: <20170816102249.0c0d8d12@gandalf.local.home>
Date:   Wed, 16 Aug 2017 10:22:49 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Borislav Petkov <bp@...en8.de>
Cc:     "Luck, Tony" <tony.luck@...el.com>,
        "Kani, Toshimitsu" <toshi.kani@....com>,
        "rjw@...ysocki.net" <rjw@...ysocki.net>,
        "lenb@...nel.org" <lenb@...nel.org>,
        "mchehab@...nel.org" <mchehab@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
        "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>
Subject: Re: [PATCH v2 4/7] ghes_edac: avoid multiple calls to dmi_walk()

On Wed, 16 Aug 2017 16:03:50 +0200
Borislav Petkov <bp@...en8.de> wrote:

> > What's the likelihood of two calls to ghes_edac_register being done
> > simultaneously?  Because two calls at the same time will get past this.  
> 
> Well, that thing gets called per GHES platform device and last time I
> checked they do get probed back-to-back but I'll check that again.

Maybe keep that original mutex just in case.

-- Steve