[PNPACPI] Ignore devices that have no resources

Ignore devices that don't have a _CRS method.
They are useless for the PNP layer as they don't provide any resources.

Cc: Adam Belay <ambx1@neo.rr.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/pnp/pnpacpi/core.c b/drivers/pnp/pnpacpi/core.c
index 816479ad217b..e77d1feb759e 100644
--- a/drivers/pnp/pnpacpi/core.c
+++ b/drivers/pnp/pnpacpi/core.c
@@ -131,7 +131,8 @@ static int __init pnpacpi_add_device(struct acpi_device *device)
         struct pnp_id *dev_id;
         struct pnp_dev *dev;
 
-        if (!ispnpidacpi(acpi_device_hid(device)) ||
+        status = acpi_get_handle(device->handle, "_CRS", &temp);
+        if (ACPI_FAILURE(status) || !ispnpidacpi(acpi_device_hid(device)) ||
                 is_exclusive_device(device))
                 return 0;