ACPI / scan: Allow platform device creation without any IO resources
Currently, ACPI platform device creation is aborted when there
are no valid IO resources for the device. This approach will not
work if the device has only GPIO as its resource or some custom
resources.
Remove zero resource check and allow platform device creation even
without any valid IO resources.
[rjw: Changelog]
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/acpi/acpi_platform.c b/drivers/acpi/acpi_platform.c
index fafec5d..32136b8 100644
--- a/drivers/acpi/acpi_platform.c
+++ b/drivers/acpi/acpi_platform.c
@@ -52,7 +52,7 @@
struct platform_device_info pdevinfo;
struct resource_list_entry *rentry;
struct list_head resource_list;
- struct resource *resources;
+ struct resource *resources = NULL;
int count;
/* If the ACPI node already has a physical device attached, skip it. */
@@ -61,9 +61,12 @@
INIT_LIST_HEAD(&resource_list);
count = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);
- if (count <= 0)
+ if (count < 0)
return 0;
+ if (!count)
+ goto create_dev;
+
resources = kmalloc(count * sizeof(struct resource), GFP_KERNEL);
if (!resources) {
dev_err(&adev->dev, "No memory for resources\n");
@@ -76,6 +79,7 @@
acpi_dev_free_resource_list(&resource_list);
+create_dev:
memset(&pdevinfo, 0, sizeof(pdevinfo));
/*
* If the ACPI node has a parent and that parent has a physical device