[3.16.y-ckt stable] Patch "ACPICA: Utilities: Cleanup to enforce ACPI_PHYSADDR_TO_PTR()/ACPI_PTR_TO_PHYSADDR()." has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    ACPICA: Utilities: Cleanup to enforce ACPI_PHYSADDR_TO_PTR()/ACPI_PTR_TO_PHYSADDR().

to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.16.y-queue

This patch is scheduled to be released in version 3.16.7-ckt12.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 30aa7c7d4b65add68a8ad18da705ab469222d0ef Mon Sep 17 00:00:00 2001
From: Lv Zheng <lv.zheng at intel.com>
Date: Mon, 13 Apr 2015 11:48:37 +0800
Subject: ACPICA: Utilities: Cleanup to enforce
 ACPI_PHYSADDR_TO_PTR()/ACPI_PTR_TO_PHYSADDR().

commit 6d3fd3cc33d50e4c0d0c0bd172de02caaec3127c upstream.

ACPICA commit 154f6d074dd38d6ebc0467ad454454e6c5c9ecdf

There are code pieces converting pointers using "(acpi_physical_address) x"
or "ACPI_CAST_PTR (t, x)" formats, this patch cleans up them.

Known issues:
1. Cleanup of "(ACPI_PHYSICAL_ADDRRESS) x" for a table field
   For the conversions around the table fields, it is better to fix it with
   alignment also fixed. So this patch doesn't modify such code. There
   should be no functional problem by leaving them unchanged.

Link: https://github.com/acpica/acpica/commit/154f6d07
Signed-off-by: Lv Zheng <lv.zheng at intel.com>
Signed-off-by: Bob Moore <robert.moore at intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki at intel.com>
Cc: George G. Davis <ggdavisiv at gmail.com>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/acpi/acpica/dsopcode.c |  3 +--
 drivers/acpi/acpica/tbdata.c   |  9 +++++----
 drivers/acpi/acpica/tbinstal.c | 10 +++++-----
 3 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/acpi/acpica/dsopcode.c b/drivers/acpi/acpica/dsopcode.c
index 6c0759c0db47..cd2d98778405 100644
--- a/drivers/acpi/acpica/dsopcode.c
+++ b/drivers/acpi/acpica/dsopcode.c
@@ -539,8 +539,7 @@ acpi_ds_eval_table_region_operands(struct acpi_walk_state *walk_state,
 		return_ACPI_STATUS(AE_NOT_EXIST);
 	}

-	obj_desc->region.address =
-	    (acpi_physical_address) ACPI_TO_INTEGER(table);
+	obj_desc->region.address = ACPI_PTR_TO_PHYSADDR(table);
 	obj_desc->region.length = table->length;

 	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
diff --git a/drivers/acpi/acpica/tbdata.c b/drivers/acpi/acpica/tbdata.c
index f499c10ceb4a..7d3dd1250398 100644
--- a/drivers/acpi/acpica/tbdata.c
+++ b/drivers/acpi/acpica/tbdata.c
@@ -113,9 +113,9 @@ acpi_tb_acquire_table(struct acpi_table_desc *table_desc,
 	case ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL:
 	case ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL:

-		table =
-		    ACPI_CAST_PTR(struct acpi_table_header,
-				  table_desc->address);
+		table = ACPI_CAST_PTR(struct acpi_table_header,
+				      ACPI_PHYSADDR_TO_PTR(table_desc->
+							   address));
 		break;

 	default:
@@ -214,7 +214,8 @@ acpi_tb_acquire_temp_table(struct acpi_table_desc *table_desc,
 	case ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL:
 	case ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL:

-		table_header = ACPI_CAST_PTR(struct acpi_table_header, address);
+		table_header = ACPI_CAST_PTR(struct acpi_table_header,
+					     ACPI_PHYSADDR_TO_PTR(address));
 		if (!table_header) {
 			return (AE_NO_MEMORY);
 		}
diff --git a/drivers/acpi/acpica/tbinstal.c b/drivers/acpi/acpica/tbinstal.c
index c0b39f304ea3..3c57ff2956c5 100644
--- a/drivers/acpi/acpica/tbinstal.c
+++ b/drivers/acpi/acpica/tbinstal.c
@@ -188,7 +188,7 @@ acpi_tb_install_fixed_table(acpi_physical_address address,
 					    ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL);
 	if (ACPI_FAILURE(status)) {
 		ACPI_ERROR((AE_INFO, "Could not acquire table length at %p",
-			    ACPI_CAST_PTR(void, address)));
+			    ACPI_PHYSADDR_TO_PTR(address)));
 		return_ACPI_STATUS(status);
 	}

@@ -247,7 +247,7 @@ acpi_tb_install_standard_table(acpi_physical_address address,
 	status = acpi_tb_acquire_temp_table(&new_table_desc, address, flags);
 	if (ACPI_FAILURE(status)) {
 		ACPI_ERROR((AE_INFO, "Could not acquire table length at %p",
-			    ACPI_CAST_PTR(void, address)));
+			    ACPI_PHYSADDR_TO_PTR(address)));
 		return_ACPI_STATUS(status);
 	}

@@ -259,8 +259,8 @@ acpi_tb_install_standard_table(acpi_physical_address address,
 	    acpi_gbl_disable_ssdt_table_install &&
 	    ACPI_COMPARE_NAME(&new_table_desc.signature, ACPI_SIG_SSDT)) {
 		ACPI_INFO((AE_INFO, "Ignoring installation of %4.4s at %p",
-			   new_table_desc.signature.ascii, ACPI_CAST_PTR(void,
-									 address)));
+			   new_table_desc.signature.ascii,
+			   ACPI_PHYSADDR_TO_PTR(address)));
 		goto release_and_exit;
 	}

@@ -516,7 +516,7 @@ void acpi_tb_uninstall_table(struct acpi_table_desc *table_desc)

 	if ((table_desc->flags & ACPI_TABLE_ORIGIN_MASK) ==
 	    ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL) {
-		ACPI_FREE(ACPI_CAST_PTR(void, table_desc->address));
+		ACPI_FREE(ACPI_PHYSADDR_TO_PTR(table_desc->address));
 	}

 	table_desc->address = ACPI_PTR_TO_PHYSADDR(NULL);