| From | "Stefan Lippers-Hollmann" <> | Subject | Re: [PATCH 3.13 072/149] ACPI / resources: ignore invalid ACPI device resources | Date | Sat, 22 Mar 2014 02:30:43 +0000 |
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Hi
On Friday 21 March 2014, Greg Kroah-Hartman wrote: > 3.13-stable review patch. If anyone has any objections, please let me know. > > ------------------ > > From: Zhang Rui <rui.zhang@intel.com> > > commit b355cee88e3b1a193f0e9a81db810f6f83ad728b upstream. > > ACPI table may export resource entry with 0 length. > But the current code interprets this kind of resource in a wrong way. > It will create a resource structure with > res->end = acpi_resource->start + acpi_resource->len - 1; > > This patch fixes a problem on my machine that a platform device fails > to be created because one of its ACPI IO resource entry (start = 0, > end = 0, length = 0) is translated into a generic resource with > start = 0, end = 0xffffffff. > > Signed-off-by: Zhang Rui <rui.zhang@intel.com> > Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> > Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> [...]
This patch should probably be dropped from -stable (3.13 and 3.10) for the time being, it causes this warning:
pnp 00:01: unknown resource type 4 in _CRS pnp 00:01: can't evaluate _CRS: 1
on all systems I've tested it on so far (~12 systems of vastly varying components and age, covering amd64 and i386).
This also seems to affect others as well: http://www.spinics.net/lists/linux-acpi/msg49431.html http://www.spinics.net/lists/linux-acpi/msg49438.html
Regards Stefan Lippers-Hollmann
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