linux-kernel - Re: [PATCH v2 3/3] x86/quirks: Add early quirk to reset Apple AirPort card

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Message-ID: <20160613144406.GF2658@codeblueprint.co.uk>
Date:	Mon, 13 Jun 2016 15:44:06 +0100
From:	Matt Fleming <matt@...eblueprint.co.uk>
To:	Lukas Wunner <lukas@...ner.de>
Cc:	Ingo Molnar <mingo@...nel.org>, x86@...nel.org,
	linux-kernel@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>,
	Yinghai Lu <yinghai@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH v2 3/3] x86/quirks: Add early quirk to reset Apple
 AirPort card

On Sun, 12 Jun, at 02:37:26PM, Lukas Wunner wrote:
> 
> Resetting the card solves the problem at the root and fixes both,
> the spurious interrupts and the memory corruption. 

It also avoids the need to figure out exactly which Boot Services
regions may have become corrupt.

This would be necessary since you can't keep all Boot Services regions
reserved because those regions can add up to be many gigabytes in
size, even on relatively low-end laptops that don't have huge amounts
of RAM to begin with.

Freeing Boot Services regions is pretty important.