From: Zhang Rui <rui.zhang@intel.com>
Date: Sun, 16 Mar 2014 13:34:16 +0000 (+0800)
Subject: ACPI: add ACPI_TYPE_LOCAL_REFERENCE support to acpi_extract_package()
X-Git-Tag: firefly_0821_release~176^2~2976^2^2~15
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e3ec483a7e24c6ebb5eb763ee56c65c239701066;p=firefly-linux-kernel-4.4.55.git

ACPI: add ACPI_TYPE_LOCAL_REFERENCE support to acpi_extract_package()

Add ACPI_TYPE_LOCAL_REFERENCE support to acpi_extract_package(),
so that we can use this helper for more cases like _ART/_TRT.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
---

diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index 07c8c5a5ee95..1ed7aba99d8d 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -149,6 +149,21 @@ acpi_extract_package(union acpi_object *package,
 				break;
 			}
 			break;
+		case ACPI_TYPE_LOCAL_REFERENCE:
+			switch (format_string[i]) {
+			case 'R':
+				size_required += sizeof(void *);
+				tail_offset += sizeof(void *);
+				break;
+			default:
+				printk(KERN_WARNING PREFIX "Invalid package element"
+					      " [%d] got reference,"
+					      " expecting [%c]\n",
+					      i, format_string[i]);
+				return AE_BAD_DATA;
+				break;
+			}
+			break;
 
 		case ACPI_TYPE_PACKAGE:
 		default:
@@ -247,7 +262,18 @@ acpi_extract_package(union acpi_object *package,
 				break;
 			}
 			break;
-
+		case ACPI_TYPE_LOCAL_REFERENCE:
+			switch (format_string[i]) {
+			case 'R':
+				*(void **)head =
+				    (void *)element->reference.handle;
+				head += sizeof(void *);
+				break;
+			default:
+				/* Should never get here */
+				break;
+			}
+			break;
 		case ACPI_TYPE_PACKAGE:
 			/* TBD: handle nested packages... */
 		default: