PM: Drop pm_flags that is not necessary
The variable pm_flags is used to prevent APM from being enabled
along with ACPI, which would lead to problems. However, acpi_init()
is always called before apm_init() and after acpi_init() has
returned, it is known whether or not ACPI will be used. Namely, if
acpi_disabled is not set after acpi_init() has returned, this means
that ACPI is enabled. Thus, it is sufficient to check acpi_disabled
in apm_init() to prevent APM from being enabled in parallel with
ACPI.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 973b070..9749980 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -1007,8 +1007,7 @@
static int __init acpi_init(void)
{
- int result = 0;
-
+ int result;
if (acpi_disabled) {
printk(KERN_INFO PREFIX "Interpreter disabled.\n");
@@ -1023,29 +1022,18 @@
init_acpi_device_notify();
result = acpi_bus_init();
-
- if (!result) {
- pci_mmcfg_late_init();
- if (pm_apm_enabled()) {
- printk(KERN_INFO PREFIX
- "APM is already active, exiting\n");
- disable_acpi();
- result = -ENODEV;
- } else {
- pm_set_acpi_flag();
- }
- } else
+ if (result) {
disable_acpi();
-
- if (acpi_disabled)
return result;
+ }
+ pci_mmcfg_late_init();
acpi_scan_init();
acpi_ec_init();
acpi_debugfs_init();
acpi_sleep_proc_init();
acpi_wakeup_device_init();
- return result;
+ return 0;
}
subsys_initcall(acpi_init);