From 7f3cc8f897634b7e2d79bc2b7105e9ae6eaf4ac2 Mon Sep 17 00:00:00 2001 From: Guenter Roeck Date: Mon, 10 Jan 2022 14:56:25 -0800 Subject: [PATCH] hwmon: Report attribute name with udev events Up to now udev events only report the affected hwmon device if an alert is reported. This requires userspace to read all attributes if it wants to know what triggered the event. Provide the attribute name with the NAME property to help userspace find the attribute causing the event. Signed-off-by: Guenter Roeck --- drivers/hwmon/hwmon.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/hwmon/hwmon.c b/drivers/hwmon/hwmon.c index 3ae961986fc3..0b79c4e1bf99 100644 --- a/drivers/hwmon/hwmon.c +++ b/drivers/hwmon/hwmon.c @@ -625,7 +625,9 @@ static const int __templates_size[] = { int hwmon_notify_event(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel) { + char event[MAX_SYSFS_ATTR_NAME_LENGTH + 5]; char sattr[MAX_SYSFS_ATTR_NAME_LENGTH]; + char *envp[] = { event, NULL }; const char * const *templates; const char *template; int base; @@ -641,8 +643,9 @@ int hwmon_notify_event(struct device *dev, enum hwmon_sensor_types type, base = hwmon_attr_base(type); scnprintf(sattr, MAX_SYSFS_ATTR_NAME_LENGTH, template, base + channel); + scnprintf(event, sizeof(event), "NAME=%s", sattr); sysfs_notify(&dev->kobj, NULL, sattr); - kobject_uevent(&dev->kobj, KOBJ_CHANGE); + kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); if (type == hwmon_temp) hwmon_thermal_notify(dev, channel);