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PNP / ACPI: proper handling of ACPI IO/Memory resource parsing failures 

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@intel.com>
Reported-and-tested-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Reported-and-tested-by: Julian Wollrath <jwollrath@web.de>
Reported-and-tested-by: Paul Bolle <pebolle@tiscali.nl>
[rjw: Changelog]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Zhang Rui 2014-03-11 22:40:27 +08:00 committed by Greg Kroah-Hartman
parent 0bf9549844
commit ae59ae911d
1 changed files with 12 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/pnp/pnpacpi/rsparser.c
View File

@ -183,9 +183,7 @@ static acpi_status pnpacpi_allocated_resource(struct acpi_resource *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_resource(struct acpi_resource *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)