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authorBob Moore <robert.moore@intel.com>2010-10-18 08:43:13 +0800
committerLen Brown <len.brown@intel.com>2010-10-17 22:55:20 -0400
commit3989170f8e3c1bd71d8f7ec6e3d52e46815ee096 (patch)
treea4af357da038a4e76ff40a752662a39a12dc6b71 /drivers/acpi
parent3af283e1141474925b33383425bbe038e75fd03a (diff)
downloadlinux-3989170f8e3c1bd71d8f7ec6e3d52e46815ee096.tar.bz2
ACPICA: Comment update; no functional change
Add a usage note to InstallAddressSpaceHandler. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/acpica/evxfregn.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/evxfregn.c b/drivers/acpi/acpica/evxfregn.c
index 541cbc1544d5..ce9314f79451 100644
--- a/drivers/acpi/acpica/evxfregn.c
+++ b/drivers/acpi/acpica/evxfregn.c
@@ -64,6 +64,12 @@ ACPI_MODULE_NAME("evxfregn")
*
* DESCRIPTION: Install a handler for all op_regions of a given space_id.
*
+ * NOTE: This function should only be called after acpi_enable_subsystem has
+ * been called. This is because any _REG methods associated with the Space ID
+ * are executed here, and these methods can only be safely executed after
+ * the default handlers have been installed and the hardware has been
+ * initialized (via acpi_enable_subsystem.)
+ *
******************************************************************************/
acpi_status
acpi_install_address_space_handler(acpi_handle device,