linux-kernel - agp/intel: can't ioremap flush page

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Message-ID: <1391886379.2669.11.camel@x41>
Date:	Sat, 08 Feb 2014 20:06:19 +0100
From:	Paul Bolle <pebolle@...cali.nl>
To:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	Ville Syrjälä 
	<ville.syrjala@...ux.intel.com>, Yinghai Lu <yinghai@...nel.org>
Cc:	David Airlie <airlied@...ux.ie>, linux-kernel@...r.kernel.org
Subject: agp/intel: can't ioremap flush page - no chipset flushing

0) Booting v3.14-rc1 on an (outdated) ThinkPad X41 triggers a kernel
error:
    pci 0000:00:02.0: can't ioremap flush page - no chipset flushing

That is this pci device:
     lspci | grep 00:02.0
     00:02.0 VGA compatible controller: Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller (rev 03)

I can't remember seeing that error before. It is apparently printed by
drivers/char/agp/intel-gtt.c. (So I've sent this message to the people
touching that file between v3.13 and v3.14-rc1. No, I haven't yet
pinpointed a specific commit.)

1) What am I supposed to do to make this error go away?


Paul Bolle

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