ACPI: properties: Fix __acpi_node_get_property_reference() return codes

Fix more return codes for device property: Align return codes of
__acpi_node_get_property_reference().

In particular, what was missed previously:

 -EPROTO could be returned in certain cases, now -EINVAL;
 -EINVAL was returned if the property was not found, now -ENOENT;
 -EINVAL was returned also if the index was higher than the number of
         entries in a package, now -ENOENT.

Reported-by: Hyungwoo Yang <hyungwoo.yang@intel.com>
Fixes: 3e3119d3088f (device property: Introduce fwnode_property_get_reference_args)
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: Hyungwoo Yang <hyungwoo.yang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c
index 5a8ac5e..e26ea20 100644 (file)
--- a/drivers/acpi/property.c
+++ b/drivers/acpi/property.c
@@ -593,7 +593,7 @@ int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode,
 
        ret = acpi_data_get_property(data, propname, ACPI_TYPE_ANY, &obj);
        if (ret)
-               return ret;
+               return ret == -EINVAL ? -ENOENT : -EINVAL;
 
        /*
         * The simplest case is when the value is a single reference.  Just
@@ -605,7 +605,7 @@ int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode,
 
                ret = acpi_bus_get_device(obj->reference.handle, &device);
                if (ret)
-                       return ret;
+                       return ret == -ENODEV ? -EINVAL : ret;
 
                args->adev = device;
                args->nargs = 0;
@@ -621,8 +621,10 @@ int __acpi_node_get_property_reference(const struct fwnode_handle *fwnode,
         * The index argument is then used to determine which reference
         * the caller wants (along with the arguments).
         */
-       if (obj->type != ACPI_TYPE_PACKAGE || index >= obj->package.count)
-               return -EPROTO;
+       if (obj->type != ACPI_TYPE_PACKAGE)
+               return -EINVAL;
+       if (index >= obj->package.count)
+               return -ENOENT;
 
        element = obj->package.elements;
        end = element + obj->package.count;