Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932138Ab3COT5K (ORCPT ); Fri, 15 Mar 2013 15:57:10 -0400 Received: from g1t0028.austin.hp.com ([15.216.28.35]:35164 "EHLO g1t0028.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754994Ab3COT5I (ORCPT ); Fri, 15 Mar 2013 15:57:08 -0400 From: Linn Crosetto To: rjw@sisk.pl, robert.moore@intel.com, ming.m.lin@intel.com, lv.zheng@intel.com, linux-acpi@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Linn Crosetto Subject: [PATCH] acpi: remove length check for large registers Date: Fri, 15 Mar 2013 13:56:07 -0600 Message-Id: <1363377367-12813-1-git-send-email-linn@hp.com> X-Mailer: git-send-email 1.7.11.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1215 Lines: 33 The legacy bit width field in the Generic Address Structure is 1 byte, limiting the reportable register width to 255 bits. Larger registers will cause a length mismatch warning to be printed in acpi_tb_validate_fadt(). To avoid the warning, disable the length mismatch check for registers larger than 255 bits. Signed-off-by: Linn Crosetto --- drivers/acpi/acpica/tbfadt.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/acpi/acpica/tbfadt.c b/drivers/acpi/acpica/tbfadt.c index 74181bf..e87abcd 100644 --- a/drivers/acpi/acpica/tbfadt.c +++ b/drivers/acpi/acpica/tbfadt.c @@ -561,6 +561,7 @@ static void acpi_tb_validate_fadt(void) * legacy length field and the corresponding 64-bit X length field. */ if (address64->address && + ACPI_MUL_8(length) <= ACPI_UINT8_MAX && (address64->bit_width != ACPI_MUL_8(length))) { ACPI_BIOS_WARNING((AE_INFO, "32/64X length mismatch in FADT/%s: %u/%u", -- 1.7.11.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/