linux-kernel - [PATCH 2/3] hwmon: (dell-smm) Cleanup init code

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Date:   Tue, 26 Apr 2022 22:03:19 +0200
From:   Armin Wolf <W_Armin@....de>
To:     pali@...nel.org
Cc:     jdelvare@...e.com, linux@...ck-us.net, linux-hwmon@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] hwmon: (dell-smm) Cleanup init code

The default values for i8k_fan_mult and i8k_fan_max
should be assigend only if the values specified as
module params or in DMI are invalid/missing.

Signed-off-by: Armin Wolf <W_Armin@....de>
---
 drivers/hwmon/dell-smm-hwmon.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/hwmon/dell-smm-hwmon.c b/drivers/hwmon/dell-smm-hwmon.c
index 202ee884de9e..f13902414615 100644
--- a/drivers/hwmon/dell-smm-hwmon.c
+++ b/drivers/hwmon/dell-smm-hwmon.c
@@ -1373,8 +1373,6 @@ static int __init dell_smm_probe(struct platform_device *pdev)
 		return -ENOMEM;

 	mutex_init(&data->i8k_mutex);
-	data->i8k_fan_mult = I8K_FAN_MULT;
-	data->i8k_fan_max = I8K_FAN_HIGH;
 	platform_set_drvdata(pdev, data);

 	if (dmi_check_system(i8k_blacklist_fan_support_dmi_table)) {
@@ -1409,7 +1407,9 @@ static int __init dell_smm_probe(struct platform_device *pdev)
 			fan_max = conf->fan_max;
 	}

-	data->i8k_fan_max = fan_max ? : I8K_FAN_HIGH;	/* Must not be 0 */
+	/* All options must not be 0 */
+	data->i8k_fan_mult = fan_mult ? : I8K_FAN_MULT;
+	data->i8k_fan_max = fan_max ? : I8K_FAN_HIGH;
 	data->i8k_pwm_mult = DIV_ROUND_UP(255, data->i8k_fan_max);

 	fan_control = dmi_first_match(i8k_whitelist_fan_control);
@@ -1421,9 +1421,6 @@ static int __init dell_smm_probe(struct platform_device *pdev)
 		dev_info(&pdev->dev, "enabling support for setting automatic/manual fan control\n");
 	}

-	if (fan_mult)
-		data->i8k_fan_mult = fan_mult;
-
 	ret = dell_smm_init_hwmon(&pdev->dev);
 	if (ret)
 		return ret;
--
2.30.2