Re: 2.6.11 cpufreq: Device or resource busy

[Andrew Morton]

Hugo Mills <hugo-lkml@xxxxxxxxxxxxx> wrote:
>
>    I've just upgraded my laptop (ASUS M3000 -- see below) from 2.6.10
>  to 2.6.11. It now seems to be unable to load the acpi_cpufreq module:
> 
>  hrm@joshua:hrm $ sudo modprobe acpi-cpufreq
>  FATAL: Error inserting acpi_cpufreq (/lib/modules/2.6.11-plain/kernel/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.ko): Device or resource busy

Presumably there's already a cpufreq driver regisered when you try to load
the acpi_cpufreq module.

If you can work out how to enable cpufreq debugging, then do so.  Or apply
the below patch, see what driver is being registered.

--- 25/drivers/cpufreq/cpufreq.c~a	2005-03-08 23:45:21.000000000 -0800
+++ 25-akpm/drivers/cpufreq/cpufreq.c	2005-03-08 23:45:28.000000000 -0800
@@ -1351,7 +1351,7 @@ int cpufreq_register_driver(struct cpufr
 	    ((!driver_data->setpolicy) && (!driver_data->target)))
 		return -EINVAL;
 
-	dprintk("trying to register driver %s\n", driver_data->name);
+	printk("trying to register driver %s\n", driver_data->name);
 
 	if (driver_data->setpolicy)
 		driver_data->flags |= CPUFREQ_CONST_LOOPS;
_

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