linux-kernel - [PATCH] drm/amd/pm: Fix unsigned expression compared with zero

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Date:   Thu, 17 Aug 2023 14:06:44 +0800
From:   Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
To:     alexander.deucher@....com
Cc:     christian.koenig@....com, Xinhui.Pan@....com, airlied@...il.com,
        daniel@...ll.ch, jdelvare@...e.com, linux@...ck-us.net,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, linux-hwmon@...r.kernel.org,
        Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>,
        Abaci Robot <abaci@...ux.alibaba.com>
Subject: [PATCH] drm/amd/pm: Fix unsigned expression compared with zero

The val is defined as unsigned int type, if(val<0) is invalid, modify
to int type.

drivers/gpu/drm/amd/amdgpu/../pm/amdgpu_pm.c:2813 amdgpu_hwmon_show_power_input() warn: unsigned 'val' is never less than zero.
drivers/gpu/drm/amd/amdgpu/../pm/amdgpu_pm.c:2800 amdgpu_hwmon_show_power_avg() warn: unsigned 'val' is never less than zero.

Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=6181
Signed-off-by: Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
---
 drivers/gpu/drm/amd/pm/amdgpu_pm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/pm/amdgpu_pm.c b/drivers/gpu/drm/amd/pm/amdgpu_pm.c
index 5b1d73b00ef7..fe490e5860d2 100644
--- a/drivers/gpu/drm/amd/pm/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/pm/amdgpu_pm.c
@@ -2794,7 +2794,7 @@ static ssize_t amdgpu_hwmon_show_power_avg(struct device *dev,
 					   struct device_attribute *attr,
 					   char *buf)
 {
-	unsigned int val;
+	int val;
 
 	val = amdgpu_hwmon_get_power(dev, AMDGPU_PP_SENSOR_GPU_AVG_POWER);
 	if (val < 0)
@@ -2807,7 +2807,7 @@ static ssize_t amdgpu_hwmon_show_power_input(struct device *dev,
 					     struct device_attribute *attr,
 					     char *buf)
 {
-	unsigned int val;
+	int val;
 
 	val = amdgpu_hwmon_get_power(dev, AMDGPU_PP_SENSOR_GPU_INPUT_POWER);
 	if (val < 0)
-- 
2.20.1.7.g153144c