Commit f722e17f authored Jan 08, 2011 by Lars-Peter Clausen

power_supply: Ignore -ENODATA errors when generating uevents



Sometimes a driver can not report a meaningful value for a certain property
and returns -ENODATA.

Currently when generating a uevent and a property return -ENODATA it is
treated as an error an no uevent is generated at all. This is not an
desirable behavior.

This patch adds a special case for -ENODATA and ignores properties which
return this error code when generating the uevent.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Tested-by: Grazvydas Ignotas <notasas@gmail.com>

parent 6501f728

drivers/power/power_supply_sysfs.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -270,7 +270,7 @@ int power_supply_uevent(struct device dev, struct kobj_uevent_env env)
		attr = &power_supply_attrs[psy->properties[j]];

		ret = power_supply_show_property(dev, attr, prop_buf);
		if (ret == -ENODEV) {
		if (ret == -ENODEV \|\| ret == -ENODATA) {
		/* When a battery is absent, we expect -ENODEV. Don't abort;
		send the uevent with at least the the PRESENT=0 property */
		ret = 0;