linux-kernel - [PATCH 2.6.30-rc4] thermal: fix off-by-1 error in trip point trigger condition

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Date:	Wed, 6 May 2009 19:34:21 +0200
From:	Vladimir Zajac <eightgraph@...il.com>
To:	rui.zhang@...el.com
Cc:	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2.6.30-rc4] thermal: fix off-by-1 error in trip point trigger condition

This patch fixes a regression caused by commit
b1569e99c795bf83b4ddf41c4f1c42761ab7f75e
"ACPI: move thermal trip handling to generic thermal layer"
which accidentally changed trip point trigger condition to
  temp > trip_temp

This patch changes the trigger condition back to
  temp >= trip_temp

Signed-off-by: Vladimir Zajac <eightgraph@...il.com>
---

 thermal_sys.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- linux-2.6.30-rc4/drivers/thermal/thermal_sys.c	2009-04-30 23:52:59.000000000 +0200
+++ linux-2.6.30-rc4-p1/drivers/thermal/thermal_sys.c	2009-05-04 19:58:30.000000000 +0200
@@ -961,7 +961,7 @@ void thermal_zone_device_update(struct t
 
 		switch (trip_type) {
 		case THERMAL_TRIP_CRITICAL:
-			if (temp > trip_temp) {
+			if (temp >= trip_temp) {
 				if (tz->ops->notify)
 					ret = tz->ops->notify(tz, count,
 							      trip_type);
@@ -974,7 +974,7 @@ void thermal_zone_device_update(struct t
 			}
 			break;
 		case THERMAL_TRIP_HOT:
-			if (temp > trip_temp)
+			if (temp >= trip_temp)
 				if (tz->ops->notify)
 					tz->ops->notify(tz, count, trip_type);
 			break;
@@ -986,14 +986,14 @@ void thermal_zone_device_update(struct t
 
 				cdev = instance->cdev;
 
-				if (temp > trip_temp)
+				if (temp >= trip_temp)
 					cdev->ops->set_cur_state(cdev, 1);
 				else
 					cdev->ops->set_cur_state(cdev, 0);
 			}
 			break;
 		case THERMAL_TRIP_PASSIVE:
-			if (temp > trip_temp || tz->passive)
+			if (temp >= trip_temp || tz->passive)
 				thermal_zone_device_passive(tz, temp,
 							    trip_temp, count);
 			break;
--
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