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From: Dan Carpenter <dan.carpenter@oracle.com>
To: Zhang Rui <rui.zhang@intel.com>
Cc: linux-pm@vger.kernel.org,
	Jacob Pan <jacob.jun.pan@linux.intel.com>,
	Arjan van de Ven <arjan@linux.intel.com>,
	kernel-janitors@vger.kernel.org
Subject: [patch] PM: intel_powerclamp: off by one in start_power_clamp()
Date: Thu, 24 Jan 2013 08:51:22 +0000	[thread overview]
Message-ID: <20130124085122.GA3547@elgon.mountain> (raw)
In-Reply-To: <5100ee96.xoiaCavCYxXgoSIK%fengguang.wu@intel.com>

This value has already been clamped correctly to 0 through 49 in
powerclamp_set_cur_state() so this patch doesn't actually change
anything.  But we should fix it anyway for consistency.

set_target_ratio is used as an offset into an array with
MAX_TARGET_RATIO (50) elements.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/drivers/thermal/intel_powerclamp.c b/drivers/thermal/intel_powerclamp.c
index a85ff38..ab3ed90 100644
--- a/drivers/thermal/intel_powerclamp.c
+++ b/drivers/thermal/intel_powerclamp.c
@@ -504,7 +504,7 @@ static int start_power_clamp(void)
 		return -EINVAL;
 	}
 
-	set_target_ratio = clamp(set_target_ratio, 0U, MAX_TARGET_RATIO);
+	set_target_ratio = clamp(set_target_ratio, 0U, MAX_TARGET_RATIO - 1);
 	/* prevent cpu hotplug */
 	get_online_cpus();
 

WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com>
To: Zhang Rui <rui.zhang@intel.com>
Cc: linux-pm@vger.kernel.org,
	Jacob Pan <jacob.jun.pan@linux.intel.com>,
	Arjan van de Ven <arjan@linux.intel.com>,
	kernel-janitors@vger.kernel.org
Subject: [patch] PM: intel_powerclamp: off by one in start_power_clamp()
Date: Thu, 24 Jan 2013 11:51:22 +0300	[thread overview]
Message-ID: <20130124085122.GA3547@elgon.mountain> (raw)
In-Reply-To: <5100ee96.xoiaCavCYxXgoSIK%fengguang.wu@intel.com>

This value has already been clamped correctly to 0 through 49 in
powerclamp_set_cur_state() so this patch doesn't actually change
anything.  But we should fix it anyway for consistency.

set_target_ratio is used as an offset into an array with
MAX_TARGET_RATIO (50) elements.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/drivers/thermal/intel_powerclamp.c b/drivers/thermal/intel_powerclamp.c
index a85ff38..ab3ed90 100644
--- a/drivers/thermal/intel_powerclamp.c
+++ b/drivers/thermal/intel_powerclamp.c
@@ -504,7 +504,7 @@ static int start_power_clamp(void)
 		return -EINVAL;
 	}
 
-	set_target_ratio = clamp(set_target_ratio, 0U, MAX_TARGET_RATIO);
+	set_target_ratio = clamp(set_target_ratio, 0U, MAX_TARGET_RATIO - 1);
 	/* prevent cpu hotplug */
 	get_online_cpus();
 

       reply	other threads:[~2013-01-24  8:51 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <5100ee96.xoiaCavCYxXgoSIK%fengguang.wu@intel.com>
2013-01-24  8:51 ` Dan Carpenter [this message]
2013-01-24  8:51   ` [patch] PM: intel_powerclamp: off by one in start_power_clamp() Dan Carpenter
2013-02-04  1:44   ` Zhang Rui
2013-02-04  1:44     ` Zhang Rui

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