From 14b0e83dc4f1e52b94acaeb85a18fd7fdd46d2dc Mon Sep 17 00:00:00 2001
From: Vishwas M <vishwas.reddy.vr@gmail.com>
Date: Tue, 7 Jul 2020 19:57:47 +0530
Subject: [PATCH] hwmon: (emc2103) fix unable to change fan pwm1_enable attribute
Git-commit: 14b0e83dc4f1e52b94acaeb85a18fd7fdd46d2dc
Patch-mainline: v5.8-rc6
References: bsc#1111666
This patch fixes a bug which does not let FAN mode to be changed from
sysfs(pwm1_enable). i.e pwm1_enable can not be set to 3, it will always
remain at 0.
This is caused because the device driver handles the result of
"read_u8_from_i2c(client, REG_FAN_CONF1, &conf_reg)" incorrectly. The
driver thinks an error has occurred if the (result != 0). This has been
fixed by changing the condition to (result < 0).
Signed-off-by: Vishwas M <vishwas.reddy.vr@gmail.com>
Link: https://lore.kernel.org/r/20200707142747.118414-1-vishwas.reddy.vr@gmail.com
Fixes: 9df7305b5a86 ("hwmon: Add driver for SMSC EMC2103 temperature monitor and fan controller")
Cc: stable@vger.kernel.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/hwmon/emc2103.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/hwmon/emc2103.c b/drivers/hwmon/emc2103.c
index 491a570e8e50..924c02c1631d 100644
--- a/drivers/hwmon/emc2103.c
+++ b/drivers/hwmon/emc2103.c
@@ -443,7 +443,7 @@ static ssize_t pwm1_enable_store(struct device *dev,
}
result = read_u8_from_i2c(client, REG_FAN_CONF1, &conf_reg);
- if (result) {
+ if (result < 0) {
count = result;
goto err;
}
--
2.16.4