power: supply: sysfs: rework uevent property loop

Instead of looping through all properties known to be supported by the
psy, loop over all known properties and decide based on the return value
of power_supply_get_property() whether the property existed.

This makes the code shorter now and even more so when power supply
extensions are added.
It also simplifies the locking, as it can all happen inside
power_supply_get_property().

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20241111-power-supply-extensions-v4-6-7240144daa8e@weissschuh.net
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

1 files changed, 5 insertions, 23 deletions

diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c
index bfe48fe01a8d0..99bfe1f03eb83 100644
--- a/drivers/power/supply/power_supply_sysfs.c
+++ b/drivers/power/supply/power_supply_sysfs.c
@@ -289,7 +289,7 @@ static ssize_t power_supply_format_property(struct device *dev,
 				dev_dbg_ratelimited(dev,
 					"driver has no data for `%s' property\n",
 					attr->attr.name);
-			else if (ret != -ENODEV && ret != -EAGAIN)
+			else if (ret != -ENODEV && ret != -EAGAIN && ret != -EINVAL)
 				dev_err_ratelimited(dev,
 					"driver failed to report `%s' property: %zd\n",
 					attr->attr.name, ret);
@@ -441,7 +441,7 @@ static int add_prop_uevent(const struct device *dev, struct kobj_uevent_env *env
 	dev_attr = &pwr_attr->dev_attr;
 
 	ret = power_supply_format_property((struct device *)dev, true, dev_attr, prop_buf);
-	if (ret == -ENODEV || ret == -ENODATA) {
+	if (ret == -ENODEV || ret == -ENODATA || ret == -EINVAL) {
 		/*
 		 * When a battery is absent, we expect -ENODEV. Don't abort;
 		 * send the uevent with at least the PRESENT=0 property
@@ -462,11 +462,7 @@ static int add_prop_uevent(const struct device *dev, struct kobj_uevent_env *env
 
 int power_supply_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
-	const struct power_supply *psy = dev_get_drvdata(dev);
-	const enum power_supply_property *battery_props =
-		power_supply_battery_info_properties;
-	unsigned long psy_drv_properties[POWER_SUPPLY_ATTR_CNT /
-					 sizeof(unsigned long) + 1] = {0};
+	struct power_supply *psy = dev_get_drvdata(dev);
 	int ret = 0, j;
 	char *prop_buf;
 
@@ -494,22 +490,8 @@ int power_supply_uevent(const struct device *dev, struct kobj_uevent_env *env)
 	if (ret)
 		goto out;
 
-	for (j = 0; j < psy->desc->num_properties; j++) {
-		set_bit(psy->desc->properties[j], psy_drv_properties);
-		ret = add_prop_uevent(dev, env, psy->desc->properties[j],
-				      prop_buf);
-		if (ret)
-			goto out;
-	}
-
-	for (j = 0; j < power_supply_battery_info_properties_size; j++) {
-		if (test_bit(battery_props[j], psy_drv_properties))
-			continue;
-		if (!power_supply_battery_info_has_prop(psy->battery_info,
-				battery_props[j]))
-			continue;
-		ret = add_prop_uevent(dev, env, battery_props[j],
-			      prop_buf);
+	for (j = 0; j < POWER_SUPPLY_ATTR_CNT; j++) {
+		ret = add_prop_uevent(dev, env, j, prop_buf);
 		if (ret)
 			goto out;
 	}