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authorKuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>2013-07-23 01:51:20 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-08-06 14:12:21 +0200
commit62eb4b07f0803d0426eb695bfe6755dd6a2cafb2 (patch)
treefa0a80fdfa1b60d09df854011b1096eb0306d3c8 /drivers
parentACPI: Cleanup sparse warning on acpi_os_initialize1() (diff)
downloadlinux-62eb4b07f0803d0426eb695bfe6755dd6a2cafb2.tar.xz
linux-62eb4b07f0803d0426eb695bfe6755dd6a2cafb2.zip
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/acpi/acpi_platform.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/acpi/acpi_platform.c b/drivers/acpi/acpi_platform.c
index fafec5ddf17f..32136b85196d 100644
--- a/drivers/acpi/acpi_platform.c
+++ b/drivers/acpi/acpi_platform.c
@@ -52,7 +52,7 @@ int acpi_create_platform_device(struct acpi_device *adev,
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 @@ int acpi_create_platform_device(struct acpi_device *adev,
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 @@ int acpi_create_platform_device(struct acpi_device *adev,
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