tree bdc1a1906488d58fde00d855862090ef2289393d
parent d30dc9abb4aacfd4df3f486f22bcbc0531b73283
author Alexey Starikovskiy <astarikovskiy@suse.de> 1191177582 +0400
committer Len Brown <len.brown@intel.com> 1191992439 -0400

ACPICA: hw: Don't carry spinlock over suspend

ACPI uses acpi_get_register() in order to get into suspend.
This function is guarded by acpi_gbl_hardware_lock, which will be carried
into resume phase.
At resume interrupts are enabled and first ACPI interrupt deadlocks on this
lock.
Solution seems to be to not lock register read, as there are no concurrent
activity at this point.

Reference: http://bugzilla.kernel.org/show_bug.cgi?id=7499

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>