From: Bob Moore <robert.moore@xxxxxxxxx>
Add a usage note to InstallAddressSpaceHandler.
Signed-off-by: Bob Moore <robert.moore@xxxxxxxxx>
Signed-off-by: Lin Ming <ming.m.lin@xxxxxxxxx>
Signed-off-by: Len Brown <len.brown@xxxxxxxxx>
---
drivers/acpi/acpica/evxfregn.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/drivers/acpi/acpica/evxfregn.c b/drivers/acpi/acpica/evxfregn.c
index 541cbc1..ce9314f 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,
--
1.7.3.2.90.gd4c43
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