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Subject[PATCH 14/14] POWER: Ignore -ENODATA errors when generating a uevent
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 <>
drivers/power/power_supply_sysfs.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/power/power_supply_sysfs.c b/drivers/power/power_supply_sysfs.c
index cd1f907..605514a 100644
--- a/drivers/power/power_supply_sysfs.c
+++ b/drivers/power/power_supply_sysfs.c
@@ -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;

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