From: Zhang Rui <rui.zhang@intel.com>
Date: Thu, 11 Sep 2008 02:56:00 +0000 (+0800)
Subject: intel_menlow: don't set max_state a negative value
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c2d06fe338912ee56c2ddd7de5574d5396ed8050;p=linux-beck.git

intel_menlow: don't set max_state a negative value

max_state is unsigned long.
don't set max_state a negative value

Cc : Thomas Sujith <sujith.thomas@intel.com>
Cc : Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
---

diff --git a/drivers/misc/intel_menlow.c b/drivers/misc/intel_menlow.c
index e00a2756e97e..124b37ddb5c1 100644
--- a/drivers/misc/intel_menlow.c
+++ b/drivers/misc/intel_menlow.c
@@ -71,6 +71,9 @@ static int memory_get_int_max_bandwidth(struct thermal_cooling_device *cdev,
 	if (ACPI_FAILURE(status))
 		return -EFAULT;
 
+	if (!value)
+		return -EINVAL;
+
 	*max_state = value - 1;
 	return 0;
 }
@@ -121,7 +124,7 @@ static int memory_set_cur_bandwidth(struct thermal_cooling_device *cdev,
 	if (memory_get_int_max_bandwidth(cdev, &max_state))
 		return -EFAULT;
 
-	if (max_state < 0 || state > max_state)
+	if (state > max_state)
 		return -EINVAL;
 
 	arg_list.count = 1;