diff --git a/drivers/acpi/hardware/hwsleep.c b/drivers/acpi/hardware/hwsleep.c
index 4d0c677..c0577ca 100644
--- a/drivers/acpi/hardware/hwsleep.c
+++ b/drivers/acpi/hardware/hwsleep.c
@@ -398,7 +398,8 @@
 	/* Wait until we enter sleep state */
 
 	do {
-		status = acpi_get_register(ACPI_BITREG_WAKE_STATUS, &in_value);
+		status = acpi_get_register_unlocked(ACPI_BITREG_WAKE_STATUS,
+						    &in_value);
 		if (ACPI_FAILURE(status)) {
 			return_ACPI_STATUS(status);
 		}
diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h
index 3d7ab9e..9512f04 100644
--- a/include/acpi/acpixf.h
+++ b/include/acpi/acpixf.h
@@ -314,6 +314,8 @@
  */
 acpi_status acpi_get_register(u32 register_id, u32 * return_value);
 
+acpi_status acpi_get_register_unlocked(u32 register_id, u32 *return_value);
+
 acpi_status acpi_set_register(u32 register_id, u32 value);
 
 acpi_status