This is a note to let you know that I've just added the patch titled
PNP / ACPI: proper handling of ACPI IO/Memory resource parsing failures
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pnp-acpi-proper-handling-of-acpi-io-memory-resource-parsing-failures.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 89935315f192abf7068d0044cefc84f162c3c81f Mon Sep 17 00:00:00 2001
From: Zhang Rui <rui.zhang@xxxxxxxxx>
Date: Tue, 11 Mar 2014 22:40:27 +0800
Subject: PNP / ACPI: proper handling of ACPI IO/Memory resource parsing failures
From: Zhang Rui <rui.zhang@xxxxxxxxx>
commit 89935315f192abf7068d0044cefc84f162c3c81f upstream.
Before commit b355cee88e3b (ACPI / resources: ignore invalid ACPI
device resources), if acpi_dev_resource_memory()/acpi_dev_resource_io()
returns false, it means the the resource is not a memeory/IO resource.
But after commit b355cee88e3b, those functions return false if the
given memory/IO resource entry is invalid (the length of the resource
is zero).
This breaks pnpacpi_allocated_resource(), because it now recognizes
the invalid memory/io resources as resources of unknown type. Thus
users see confusing warning messages on machines with zero length
ACPI memory/IO resources.
Fix the problem by rearranging pnpacpi_allocated_resource() so that
it calls acpi_dev_resource_memory() for memory type and IO type
resources only, respectively.
Fixes: b355cee88e3b (ACPI / resources: ignore invalid ACPI device resources)
Signed-off-by: Zhang Rui <rui.zhang@xxxxxxxxx>
Reported-and-tested-by: Markus Trippelsdorf <markus@xxxxxxxxxxxxxxx>
Reported-and-tested-by: Julian Wollrath <jwollrath@xxxxxx>
Reported-and-tested-by: Paul Bolle <pebolle@xxxxxxxxxx>
[rjw: Changelog]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/pnp/pnpacpi/rsparser.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
--- a/drivers/pnp/pnpacpi/rsparser.c
+++ b/drivers/pnp/pnpacpi/rsparser.c
@@ -183,9 +183,7 @@ static acpi_status pnpacpi_allocated_res
struct resource r;
int i, flags;
- if (acpi_dev_resource_memory(res, &r)
- || acpi_dev_resource_io(res, &r)
- || acpi_dev_resource_address_space(res, &r)
+ if (acpi_dev_resource_address_space(res, &r)
|| acpi_dev_resource_ext_address_space(res, &r)) {
pnp_add_resource(dev, &r);
return AE_OK;
@@ -217,6 +215,17 @@ static acpi_status pnpacpi_allocated_res
}
switch (res->type) {
+ case ACPI_RESOURCE_TYPE_MEMORY24:
+ case ACPI_RESOURCE_TYPE_MEMORY32:
+ case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
+ if (acpi_dev_resource_memory(res, &r))
+ pnp_add_resource(dev, &r);
+ break;
+ case ACPI_RESOURCE_TYPE_IO:
+ case ACPI_RESOURCE_TYPE_FIXED_IO:
+ if (acpi_dev_resource_io(res, &r))
+ pnp_add_resource(dev, &r);
+ break;
case ACPI_RESOURCE_TYPE_DMA:
dma = &res->data.dma;
if (dma->channel_count > 0 && dma->channels[0] != (u8) -1)
Patches currently in stable-queue which might be from rui.zhang@xxxxxxxxx are
queue-3.10/acpi-resources-ignore-invalid-acpi-device-resources.patch
queue-3.10/pnp-acpi-proper-handling-of-acpi-io-memory-resource-parsing-failures.patch
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