On Mon, 7 Aug 2006, Andrew Morton wrote:
> acpi_os_acquire_object() is fixed in -rc4. I queued the
> acpi_pci_link_set() improvement for sending on to Len, thanks.
Thanks. Unfortunately, looking at the refactorized ACPI code in
2.6.18-rc4, there are still issues with sleeping functions called with
disabled interrupts (during resume), in ACPI code.
Two random examples:
- when acpi_pci_link_set() is called during resume (local irqs off), the
following callchain happens, which is bad: acpi_pci_link_resume ->
acpi_pci_link_set -> acpi_set_current_resources ->
acpi_rs_set_srs_method_data -> acpi_ns_evaluate -> acpi_ns_get_node ..
here the mutex is acquired. Not good.
- device_power_up -> sysdev_resume -> __sysdev_resume -> cpufreq_resume ->
blocking_notifier_call_chain -> down on semaphore. Not good.
Is there any general idea for solution?
--
JiKos.
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