From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Date: Mon, 5 Dec 2022 19:08:00 +0000 (+0100)
Subject: ACPI: processor: perflib: Adjust acpi_processor_notify_smm() return value
X-Git-Tag: v6.2-rc1~188^2~2^3
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f1a70bac90cafd1b20a747b6dcc49d3a79050626;p=thirdparty%2Flinux.git

ACPI: processor: perflib: Adjust acpi_processor_notify_smm() return value

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@intel.com>
---

diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index 7b6fa1b27afb7..970f04a958cd2 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -475,10 +475,12 @@ int acpi_processor_notify_smm(struct module *calling_module)
 
 	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;
 	}