From 05131ecc99ea9da7f45ba3058fe8a2c1d0ceeab8 Mon Sep 17 00:00:00 2001 From: Venkatesh Pallipadi Date: Sun, 23 Oct 2005 16:31:00 -0400 Subject: [ACPI] Avoid BIOS inflicted crashes by evaluating _PDC only once Linux invokes the AML _PDC method (Processor Driver Capabilities) to tell the BIOS what features it can handle. While the ACPI spec says nothing about the OS invoking _PDC multiple times, doing so with changing bits seems to hopelessly confuse the BIOS on multiple platforms up to and including crashing the system. Factor out the _PDC invocation so Linux invokes it only once. http://bugzilla.kernel.org/show_bug.cgi?id=5483 Signed-off-by: Venkatesh Pallipadi Signed-off-by: Len Brown --- drivers/acpi/processor_perflib.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'drivers/acpi/processor_perflib.c') diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c index 22c7bb66c20..532370734c6 100644 --- a/drivers/acpi/processor_perflib.c +++ b/drivers/acpi/processor_perflib.c @@ -315,8 +315,6 @@ static int acpi_processor_get_performance_info(struct acpi_processor *pr) if (!pr || !pr->performance || !pr->handle) return_VALUE(-EINVAL); - acpi_processor_set_pdc(pr, pr->performance->pdc); - status = acpi_get_handle(pr->handle, "_PCT", &handle); if (ACPI_FAILURE(status)) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, -- cgit v1.2.3 From d479e908457f4972205fcafa054f8030e91781ef Mon Sep 17 00:00:00 2001 From: Arjan van de Ven Date: Fri, 6 Jan 2006 16:47:00 -0500 Subject: [ACPI] move some run-time structure inits to compile time acpi_processor_limit_fops.write was written at run time, but can be initiailized at compile-time instead. Similar for acpi_video_bus_POST_fops.write and friends, but keep doing those at runtime to avoid prototype-hell. Signed-off-by: Arjan van de Ven Signed-off-by: Len Brown --- drivers/acpi/processor_perflib.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/acpi/processor_perflib.c') diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c index 22c7bb66c20..0c0234e1826 100644 --- a/drivers/acpi/processor_perflib.c +++ b/drivers/acpi/processor_perflib.c @@ -520,8 +520,8 @@ static void acpi_cpufreq_add_file(struct acpi_processor *pr) "Unable to create '%s' fs entry\n", ACPI_PROCESSOR_FILE_PERFORMANCE)); else { + acpi_processor_perf_fops.write = acpi_processor_write_performance; entry->proc_fops = &acpi_processor_perf_fops; - entry->proc_fops->write = acpi_processor_write_performance; entry->data = acpi_driver_data(device); entry->owner = THIS_MODULE; } -- cgit v1.2.3