linux-kernel - [PATCH 13/23] ACPI: Use ACPICA native way to decode the PLD buffer

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Date:	Sun, 23 Sep 2012 00:34:01 -0400
From:	Len Brown <lenb@...nel.org>
To:	linux-acpi@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Feng Tang <feng.tang@...el.com>,
	Bob Moore <robert.moore@...el.com>,
	Len Brown <len.brown@...el.com>
Subject: [PATCH 13/23] ACPI: Use ACPICA native way to decode the PLD buffer

From: Feng Tang <feng.tang@...el.com>

This patch is on top of the ACPICA 20120816 release, which implemented
a native way to decode PLD buffer, so use it instead of leting upper
level users do the decoding.

v2: Modify the check for PLD buffer length to reject buffers whose
length < 16

Signed-off-by: Feng Tang <feng.tang@...el.com>
Signed-off-by: Bob Moore <robert.moore@...el.com>
Signed-off-by: Len Brown <len.brown@...el.com>
---
 drivers/acpi/utils.c    | 11 +++++++----
 include/acpi/acpi_bus.h | 31 +------------------------------
 2 files changed, 8 insertions(+), 34 deletions(-)

diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index 3e87c9c..462f7e3 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -384,7 +384,7 @@ acpi_evaluate_reference(acpi_handle handle,
 EXPORT_SYMBOL(acpi_evaluate_reference);
 
 acpi_status
-acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld *pld)
+acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld)
 {
 	acpi_status status;
 	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
@@ -400,13 +400,16 @@ acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld *pld)
 	if (!output || output->type != ACPI_TYPE_PACKAGE
 	    || !output->package.count
 	    || output->package.elements[0].type != ACPI_TYPE_BUFFER
-	    || output->package.elements[0].buffer.length > sizeof(*pld)) {
+	    || output->package.elements[0].buffer.length < ACPI_PLD_REV1_BUFFER_SIZE) {
 		status = AE_TYPE;
 		goto out;
 	}
 
-	memcpy(pld, output->package.elements[0].buffer.pointer,
-	       output->package.elements[0].buffer.length);
+	status = acpi_decode_pld_buffer(
+			output->package.elements[0].buffer.pointer,
+			output->package.elements[0].buffer.length,
+			pld);
+
 out:
 	kfree(buffer.pointer);
 	return status;
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index bde976e..0c1fcd4 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -54,37 +54,8 @@ acpi_status
 acpi_evaluate_hotplug_ost(acpi_handle handle, u32 source_event,
 			u32 status_code, struct acpi_buffer *status_buf);
 
-struct acpi_pld {
-	unsigned int revision:7; /* 0 */
-	unsigned int ignore_colour:1; /* 7 */
-	unsigned int colour:24; /* 8 */
-	unsigned int width:16; /* 32 */
-	unsigned int height:16; /* 48 */
-	unsigned int user_visible:1; /* 64 */
-	unsigned int dock:1; /* 65 */
-	unsigned int lid:1; /* 66 */
-	unsigned int panel:3; /* 67 */
-	unsigned int vertical_pos:2; /* 70 */
-	unsigned int horizontal_pos:2; /* 72 */
-	unsigned int shape:4; /* 74 */
-	unsigned int group_orientation:1; /* 78 */
-	unsigned int group_token:8; /* 79 */
-	unsigned int group_position:8; /* 87 */
-	unsigned int bay:1; /* 95 */
-	unsigned int ejectable:1; /* 96 */
-	unsigned int ospm_eject_required:1; /* 97 */
-	unsigned int cabinet_number:8; /* 98 */
-	unsigned int card_cage_number:8; /* 106 */
-	unsigned int reference:1; /* 114 */
-	unsigned int rotation:4; /* 115 */
-	unsigned int order:5; /* 119 */
-	unsigned int reserved:4; /* 124 */
-	unsigned int vertical_offset:16; /* 128 */
-	unsigned int horizontal_offset:16; /* 144 */
-} __attribute__((__packed__));
-
 acpi_status
-acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld *pld);
+acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld);
 #ifdef CONFIG_ACPI
 
 #include <linux/proc_fs.h>
-- 
1.7.12.1.396.g16eed7c

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