linux-kernel - Re: [PATCH] x86, mce: Print warning if MCE handler fails to register /dev/mcelog

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Message-ID: <20130409185221.GA5077@pd.tnic>
Date:	Tue, 9 Apr 2013 20:52:21 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	"Luck, Tony" <tony.luck@...el.com>
Cc:	Khalid Aziz <khalid.aziz@...cle.com>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"hpa@...or.com" <hpa@...or.com>, "x86@...nel.org" <x86@...nel.org>,
	"linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86, mce: Print warning if MCE handler fails to register
 /dev/mcelog

On Tue, Apr 09, 2013 at 06:30:58PM +0000, Luck, Tony wrote:
> -	misc_register(&mce_chrdev_device);
> +	if (misc_register(&mce_chrdev_device) != 0)
> +		pr_warn("Failed to register mcelog device\n");
> 
> Did this actually happen to you?  Or is this just "good practice" to check the
> return value from misc_register?

I'm very sceptical this actually happens - we would've otherwise seen
reports about mcelog not starting correctly.

Hmm.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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