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PM: Improve error code of pm_notifier_call_chain()

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This enables pm_notifier_call_chain() to get the actual error code
in the callback rather than always assume -EINVAL by converting all
PM notifier calls to return encapsulate error code with
notifier_from_errno().

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
This commit is contained in:
Akinobu Mita
2011-07-08 20:53:36 +02:00
committed by Rafael J. Wysocki
parent 1d8047a6f7
commit f0c077a8b7
4 changed files with 10 additions and 9 deletions
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5
kernel/power/main.c
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@@ -37,8 +37,9 @@ EXPORT_SYMBOL_GPL(unregister_pm_notifier);
int pm_notifier_call_chain(unsigned long val)
{
return (blocking_notifier_call_chain(&pm_chain_head, val, NULL)
== NOTIFY_BAD) ? -EINVAL : 0;
int ret = blocking_notifier_call_chain(&pm_chain_head, val, NULL);
return notifier_to_errno(ret);
}
/* If set, devices may be suspended and resumed asynchronously. */