From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dominik Brodowski Subject: [PATCH 4/5] processor: nocst module parameter Date: Thu, 23 Dec 2004 15:08:09 +0100 Message-ID: <20041223140809.GD7973@dominikbrodowski.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, len.brown-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org List-Id: linux-acpi@vger.kernel.org Add a "nocst" module parameter which blocks _CST parsing and always uses FADT info instead. Signed-off-by: Dominik Brodowski --- drivers/acpi/processor_idle.c | 13 ++++++++++--- 1 files changed, 10 insertions(+), 3 deletions(-) Index: linux-2.6.10-rc3+bk-acpi/drivers/acpi/processor_idle.c =================================================================== --- linux-2.6.10-rc3+bk-acpi.orig/drivers/acpi/processor_idle.c 2004-12-23 14:25:28.737417644 +0100 +++ linux-2.6.10-rc3+bk-acpi/drivers/acpi/processor_idle.c 2004-12-23 14:25:32.385908579 +0100 @@ -55,7 +55,10 @@ #define C3_OVERHEAD 4 /* 1us (3.579 ticks per us) */ static void (*pm_idle_save)(void); -module_param_named(max_cstate, max_cstate, uint, 0644); +module_param(max_cstate, uint, 0644); + +static unsigned int nocst = 0; +module_param(nocst, uint, 0000); /* -------------------------------------------------------------------------- Power Management @@ -506,6 +509,10 @@ if (errata.smp) return_VALUE(-ENODEV); + + if (nocst) + return_VALUE(-ENODEV); + pr->power.count = 0; for (i = 0; i < ACPI_PROCESSOR_MAX_POWER; i++) memset(pr->power.states, 0, sizeof(struct acpi_processor_cx)); @@ -800,7 +807,7 @@ if (!pr) return_VALUE(-EINVAL); - if (errata.smp) { + if (errata.smp || nocst) { return_VALUE(-ENODEV); } @@ -917,7 +924,7 @@ first_run++; } - if (!errata.smp && (pr->id == 0) && acpi_fadt.cst_cnt) { + if (!errata.smp && (pr->id == 0) && acpi_fadt.cst_cnt && !nocst) { status = acpi_os_write_port(acpi_fadt.smi_cmd, acpi_fadt.cst_cnt, 8); if (ACPI_FAILURE(status)) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/