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authorLen Brown <len.brown@intel.com>2007-12-13 17:38:03 -0500
committerLen Brown <len.brown@intel.com>2008-01-11 12:26:47 -0500
commit9f9adecd2d0e4f88fa0e8cb06c6ec207748df70a (patch)
treeb3914860b74a9f6c3ae42016aa708b54040248f8 /drivers/acpi/bus.c
parentda8cadb31b82c9d41fc593c8deab6aa20b162d6b (diff)
PM: ACPI and APM must not be enabled at the same time
ACPI and APM used "pm_active" to guarantee that they would not be simultaneously active. But pm_active was recently moved under CONFIG_PM_LEGACY, so that without CONFIG_PM_LEGACY, pm_active became a NOP -- allowing ACPI and APM to both be simultaneously enabled. This caused unpredictable results, including boot hangs. Further, the code under CONFIG_PM_LEGACY is scheduled for removal. So replace pm_active with pm_flags. pm_flags depends only on CONFIG_PM, which is present for both CONFIG_APM and CONFIG_ACPI. http://bugzilla.kernel.org/show_bug.cgi?id=9194 Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'drivers/acpi/bus.c')
-rw-r--r--drivers/acpi/bus.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 49d432d0a12..d7a115c362d 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -29,7 +29,6 @@
#include <linux/list.h>
#include <linux/sched.h>
#include <linux/pm.h>
-#include <linux/pm_legacy.h>
#include <linux/device.h>
#include <linux/proc_fs.h>
#ifdef CONFIG_X86
@@ -764,16 +763,14 @@ static int __init acpi_init(void)
result = acpi_bus_init();
if (!result) {
-#ifdef CONFIG_PM_LEGACY
- if (!PM_IS_ACTIVE())
- pm_active = 1;
+ if (!(pm_flags & PM_APM))
+ pm_flags |= PM_ACPI;
else {
printk(KERN_INFO PREFIX
"APM is already active, exiting\n");
disable_acpi();
result = -ENODEV;
}
-#endif
} else
disable_acpi();