linux-kernel - [PATCH 3.14 196/228] ACPICA: Tables: Restore old behavor to favor 32-bit FADT addresses.

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Message-Id: <20140604232354.322453264@linuxfoundation.org>
Date:	Wed,  4 Jun 2014 16:23:45 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Lv Zheng <lv.zheng@...el.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Subject: [PATCH 3.14 196/228] ACPICA: Tables: Restore old behavor to favor 32-bit FADT addresses.

3.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Lv Zheng <lv.zheng@...el.com>

commit 85dbd5801f62b66e2aa7826aaefcaebead44c8a6 upstream.

We need to find a smarter way to switch to 64-bit FADT addresses according
to the bug report.  This patch reverts Linux to the original behavior.

Fixes: 0249ed2444d6 (ACPICA: Add option to favor 32-bit FADT addresses.)
References: https://bugzilla.kernel.org/show_bug.cgi?id=74021
Reported-and-tested-by: Oswald Buddenhagen <ossi@....org>
Signed-off-by: Lv Zheng <lv.zheng@...el.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/acpi/acpica/acglobal.h |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/acpi/acpica/acglobal.h
+++ b/drivers/acpi/acpica/acglobal.h
@@ -132,9 +132,9 @@ u8 ACPI_INIT_GLOBAL(acpi_gbl_do_not_use_
  * address. Although ACPICA adheres to the ACPI specification which
  * requires the use of the corresponding 64-bit address if it is non-zero,
  * some machines have been found to have a corrupted non-zero 64-bit
- * address. Default is FALSE, do not favor the 32-bit addresses.
+ * address. Default is TRUE, favor the 32-bit addresses.
  */
-u8 ACPI_INIT_GLOBAL(acpi_gbl_use32_bit_fadt_addresses, FALSE);
+u8 ACPI_INIT_GLOBAL(acpi_gbl_use32_bit_fadt_addresses, TRUE);

 /*
  * Optionally truncate I/O addresses to 16 bits. Provides compatibility

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