]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
ACPI: Fix acpi_processor_idle and idle= boot parameters interaction
authorVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Wed, 30 Apr 2008 17:57:15 +0000 (13:57 -0400)
committerLen Brown <len.brown@intel.com>
Wed, 30 Apr 2008 17:57:15 +0000 (13:57 -0400)
commit36a913586597cab1cd565e9bf348d037f0df955b
tree16466b07b7edc2c53357c2e00e39164dabc95af9
parent0fda6b403f0eca66ad8a7c946b3996e359100443
ACPI: Fix acpi_processor_idle and idle= boot parameters interaction

acpi_processor_idle and "idle=" boot parameter interaction is broken.
The problem is that, at boot time acpi driver is checking for "idle=" boot
option and not registering the acpi idle handler. But, when there is a CST
changed callback (typically when switching AC <-> battery or suspend-resume)
there are no checks for boot_option_idle_override and acpi idle handler tries
to get installed with nasty side effects.

With CPU_IDLE configured this issue causes results in a nasty oops on CST
change callback and without CPU_IDLE there is no oops, but boot option
of "idle=" gets ignored and acpi idle handler gets installed.

Change the behavior to not do anything in acpi idle handler when there is a
"idle=" boot option.

Note that the problem is only there when "idle=" boot option is used.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
drivers/acpi/processor_idle.c