From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Avoid returning a confusing error code from acpi_processor_notify_smm()
if it is called for the second time in the case when SMM notification
regarding P-state control is not supported.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
---
drivers/acpi/processor_perflib.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
Index: linux-pm/drivers/acpi/processor_perflib.c
===================================================================
--- linux-pm.orig/drivers/acpi/processor_perflib.c
+++ linux-pm/drivers/acpi/processor_perflib.c
@@ -475,10 +475,12 @@ int acpi_processor_notify_smm(struct mod
result = acpi_processor_pstate_control();
if (result <= 0) {
- if (!result)
+ if (result) {
+ is_done = result;
+ } else {
pr_debug("No SMI port or pstate_control\n");
-
- is_done = -EIO;
+ is_done = 1;
+ }
goto out_put;
}
