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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 <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
This commit is contained in:
Akinobu Mita 2011-07-08 20:53:36 +02:00 • committed by Rafael J. Wysocki
commit f0c077a8b7
4 changed files with 10 additions and 9 deletions
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4
drivers/s390/char/vmwatchdog.c
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@ -258,13 +258,13 @@ static int vmwdt_suspend(void)
if (test_and_set_bit(VMWDT_OPEN, &vmwdt_is_open)) {
pr_err("The system cannot be suspended while the watchdog"
" is in use\n");
return NOTIFY_BAD;
return notifier_from_errno(-EBUSY);
}
if (test_bit(VMWDT_RUNNING, &vmwdt_is_open)) {
clear_bit(VMWDT_OPEN, &vmwdt_is_open);
pr_err("The system cannot be suspended while the watchdog"
" is running\n");
return NOTIFY_BAD;
return notifier_from_errno(-EBUSY);
}
return NOTIFY_DONE;
}

8
drivers/s390/cio/css.c
View file

@ -814,8 +814,8 @@ static int css_power_event(struct notifier_block *this, unsigned long event,
mutex_unlock(&css->mutex);
continue;
}
if (__chsc_do_secm(css, 0))
ret = NOTIFY_BAD;
ret = __chsc_do_secm(css, 0);
ret = notifier_from_errno(ret);
mutex_unlock(&css->mutex);
}
break;
@ -831,8 +831,8 @@ static int css_power_event(struct notifier_block *this, unsigned long event,
mutex_unlock(&css->mutex);
continue;
}
if (__chsc_do_secm(css, 1))
ret = NOTIFY_BAD;
ret = __chsc_do_secm(css, 1);
ret = notifier_from_errno(ret);
mutex_unlock(&css->mutex);
}
/* search for subchannels, which appeared during hibernation */