linux-kernel - [PATCH v2] drivers/thermal: optimize the for circle to run a bit fast

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Date:   Mon, 26 Oct 2020 18:37:42 -0700
From:   Bernard Zhao <bernard@...o.com>
To:     Zhang Rui <rui.zhang@...el.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Amit Kucheria <amitk@...nel.org>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     opensource.kernel@...o.com, Bernard Zhao <bernard@...o.com>
Subject: [PATCH v2] drivers/thermal: optimize the for circle to run a bit fast

Function thermal_zone_device_register, in the for circle, if the
first if branch set the count bit in tz->trips_disabled, there is
no need to set in the other if branch again.
This change is to make the code run a bit fast and readable.

Signed-off-by: Bernard Zhao <bernard@...o.com>

Changes since V1:
*make the code more clear and readable

Link for V1:
*https://lore.kernel.org/patchwork/patch/1324507/
---
 drivers/thermal/thermal_core.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index c6d74bc1c90b..3d1e0033bf3e 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -1446,12 +1446,9 @@ thermal_zone_device_register(const char *type, int trips, int mask,
 		goto release_device;
 
 	for (count = 0; count < trips; count++) {
-		if (tz->ops->get_trip_type(tz, count, &trip_type))
-			set_bit(count, &tz->trips_disabled);
-		if (tz->ops->get_trip_temp(tz, count, &trip_temp))
-			set_bit(count, &tz->trips_disabled);
-		/* Check for bogus trip points */
-		if (trip_temp == 0)
+		if (tz->ops->get_trip_type(tz, count, &trip_type) ||
+		    tz->ops->get_trip_temp(tz, count, &trip_temp) ||
+		    !trip_temp)
 			set_bit(count, &tz->trips_disabled);
 	}
 
-- 
2.28.0