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power_supply: Initialize changed_work before calling device_add 

Calling device_add causes an inital uevent for that device to be generated.
The power_supply uevent function calls the drivers get_property function,
which might causes the driver to update its state, which again might
causes the driver to call power_supply_changed(). Since the power_supplys
changed_work has not been initialized at this point the behavior is
undefined and can result in an OOPS.

This patch fixes the issue by initializing the power_supplys changed_work
prior to adding the power_supplys device to the device tree.

Reported-by: Grazvydas Ignotas <notasas@gmail.com>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Tested-by: Grazvydas Ignotas <notasas@gmail.com>
This commit is contained in:
Lars-Peter Clausen 2011-02-21 15:34:19 +01:00
parent f722e17fdb
commit 9777467257
1 changed files with 2 additions and 2 deletions
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4
drivers/power/power_supply_core.c
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@ -171,6 +171,8 @@ int power_supply_register(struct device *parent, struct power_supply *psy)
dev_set_drvdata(dev, psy);
psy->dev = dev;
INIT_WORK(&psy->changed_work, power_supply_changed_work);
rc = kobject_set_name(&dev->kobj, "%s", psy->name);
if (rc)
goto kobject_set_name_failed;
@ -179,8 +181,6 @@ int power_supply_register(struct device *parent, struct power_supply *psy)
if (rc)
goto device_add_failed;
INIT_WORK(&psy->changed_work, power_supply_changed_work);
rc = power_supply_create_triggers(psy);
if (rc)
goto create_triggers_failed;