From 70c33e211b2b78830f76c908e5236b77ffde63a0 Mon Sep 17 00:00:00 2001 From: Guenter Roeck Date: Fri, 21 Aug 2026 07:49:16 -0700 Subject: [PATCH] hwmon: (sht4x) Fix return value from heater_enable_store() Sashiko reports: The return value in heater_enable_store() causes an unexpected write failure in user-space. When the heater is successfully enabled, the function returns 0 instead of count: drivers/hwmon/sht4x.c:heater_enable_store() { ... data->heating_complete = jiffies + msecs_to_jiffies(heating_time_bound); data->data_pending = true; return 0; } Returning 0 signals to VFS that no bytes were processed. Standard user-space tools will retry the write with the remaining bytes. On the retry, time_before(jiffies, data->heating_complete) evaluates to true, and the function immediately fails with -EBUSY. Return count as expected to fix the problem. Fixes: 0eed6fc3d2b9e ("hwmon: (sht4x): add heater support") Cc: Antoni Pokusinski Cc: Alessandro Zini Signed-off-by: Guenter Roeck Link: https://patch.msgid.link/20260821144916.2889031-2-linux@roeck-us.net --- drivers/hwmon/sht4x.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hwmon/sht4x.c b/drivers/hwmon/sht4x.c index 7a0dc2ed723d..a97dda9e92dc 100644 --- a/drivers/hwmon/sht4x.c +++ b/drivers/hwmon/sht4x.c @@ -288,7 +288,7 @@ static ssize_t heater_enable_store(struct device *dev, data->heating_complete = jiffies + msecs_to_jiffies(heating_time_bound); data->data_pending = true; - return 0; + return count; } static ssize_t heater_power_show(struct device *dev,