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.zh...@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.zh...@intel.com>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
> Signed-off-by: Greg Kroah-Hartman <gre...@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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