linux-kernel - [PATCH v1 07/11] thermal/acpi: Simplifify the condition check

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Date:   Fri,  3 Feb 2023 18:33:27 +0100
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     rjw@...ysocki.net
Cc:     linux-acpi@...r.kernel.org, linux-pm@...r.kernel.org,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Zhang Rui <rui.zhang@...el.com>, Len Brown <lenb@...nel.org>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v1 07/11] thermal/acpi: Simplifify the condition check

The condition:

if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE))

and on the other side: ACPI_TRIPS_INIT (... | ACPI_TRIPS_ACTIVE)

So if the first predicate is true, the second is also true.

The 'valid' flag for the trip point is also checked before, so it is
pointless to redo the same check again and again as it is unchanged.

Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
---
 drivers/acpi/thermal.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index a3a8130c955f..c7c2b3d63e90 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -321,6 +321,9 @@ static int acpi_thermal_trips_update_passive(struct acpi_thermal *tz, int flag)
 	int valid = 0;
 
 	valid = tz->trips[ACPI_THERMAL_TRIP_PASSIVE].flags.valid;
+	if (!valid)
+		return 0;
+
 	if (psv == -1) {
 		status = AE_SUPPORT;
 	} else if (psv > 0) {
@@ -398,13 +401,16 @@ static int acpi_thermal_trips_update_active(struct acpi_thermal *tz, int flag)
 
 	for (i = ACPI_THERMAL_TRIP_ACTIVE; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
 		char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
+
 		valid = tz->trips[i].flags.valid;
 
 		if (act == -1)
 			break; /* disable all active trip points */
 
-		if (flag == ACPI_TRIPS_INIT || ((flag & ACPI_TRIPS_ACTIVE) &&
-		    tz->trips[i].flags.valid)) {
+		if (!tz->trips[i].flags.valid)
+			continue;
+		
+		if (flag & ACPI_TRIPS_ACTIVE)  {
 			status = acpi_evaluate_integer(tz->device->handle,
 						       name, NULL, &tmp);
 			if (ACPI_FAILURE(status)) {
@@ -436,7 +442,7 @@ static int acpi_thermal_trips_update_active(struct acpi_thermal *tz, int flag)
 		}
 
 		name[2] = 'L';
-		if ((flag & ACPI_TRIPS_DEVICES) && tz->trips[i].flags.valid ) {
+		if (flag & ACPI_TRIPS_DEVICES) {
 			memset(&devices, 0, sizeof(struct acpi_handle_list));
 			status = acpi_evaluate_reference(tz->device->handle,
 							 name, NULL, &devices);
@@ -455,6 +461,7 @@ static int acpi_thermal_trips_update_active(struct acpi_thermal *tz, int flag)
 				ACPI_THERMAL_TRIPS_EXCEPTION(flag, tz, "device");
 			}
 		}
+
 		if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES))
 			if (valid != tz->trips[i].flags.valid)
 				ACPI_THERMAL_TRIPS_EXCEPTION(flag, tz, "state");
@@ -495,8 +502,7 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
 	}
 
 	/* Passive (optional) */
-	if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips[ACPI_THERMAL_TRIP_PASSIVE].flags.valid) ||
-		(flag == ACPI_TRIPS_INIT)) {
+	if (flag & ACPI_TRIPS_PASSIVE) {
 		acpi_thermal_trips_update_passive(tz, flag);
 	}
 
-- 
2.34.1