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Commit 6dfad339 authored Feb 14, 2011 by Lin Ming Committed by Len Brown Mar 02, 2011

ACPICA: GPE detect optimization - ignore unused GPE registers

This optimization will simply ignore GPE registers that contain
no enabled GPEs - there is no need to read the register.
ACPICA bugzilla 884.

http://www.acpica.org/bugzilla/show_bug.cgi?id=884



Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

parent dd9c1549

drivers/acpi/acpica/evgpe.c

+9 −0

Original line number	Original line	Diff line number	Diff line
	@@ -373,6 +373,15 @@ u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info * gpe_xrupt_list)

	gpe_register_info = &gpe_block->register_info[i];		gpe_register_info = &gpe_block->register_info[i];

			/*
			* Optimization: If there are no GPEs enabled within this
			* register, we can safely ignore the entire register.
			*/
			if (!(gpe_register_info->enable_for_run \|
			gpe_register_info->enable_for_wake)) {
			continue;
			}

	/* Read the Status Register */		/* Read the Status Register */

	status =		status =