PM: Improve error code of pm_notifier_call_chain()
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>
diff --git a/drivers/char/apm-emulation.c b/drivers/char/apm-emulation.c
index 548708c..a7346ab 100644
--- a/drivers/char/apm-emulation.c
+++ b/drivers/char/apm-emulation.c
@@ -606,7 +606,7 @@
return NOTIFY_OK;
/* interrupted by signal */
- return NOTIFY_BAD;
+ return notifier_from_errno(err);
case PM_POST_SUSPEND:
/*
diff --git a/drivers/s390/char/vmwatchdog.c b/drivers/s390/char/vmwatchdog.c
index 12ef912..11312f4 100644
--- a/drivers/s390/char/vmwatchdog.c
+++ b/drivers/s390/char/vmwatchdog.c
@@ -258,13 +258,13 @@
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;
}
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index c47b25f..92d7324 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -814,8 +814,8 @@
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 @@
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 */
diff --git a/kernel/power/main.c b/kernel/power/main.c
index 2981af4..6c601f8 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -37,8 +37,9 @@
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. */