diff options
| author | Len Brown <len.brown@intel.com> | 2007-12-13 17:38:03 -0500 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-01-11 12:26:47 -0500 |
| commit | 9f9adecd2d0e4f88fa0e8cb06c6ec207748df70a (patch) | |
| tree | b3914860b74a9f6c3ae42016aa708b54040248f8 /arch/x86/kernel | |
| parent | da8cadb31b82c9d41fc593c8deab6aa20b162d6b (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 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/apm_32.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/arch/x86/kernel/apm_32.c b/arch/x86/kernel/apm_32.c index 17089a04102..af045ca0f65 100644 --- a/arch/x86/kernel/apm_32.c +++ b/arch/x86/kernel/apm_32.c @@ -2256,14 +2256,12 @@ static int __init apm_init(void) apm_info.disabled = 1; return -ENODEV; } - if (PM_IS_ACTIVE()) { + if (pm_flags & PM_ACPI) { printk(KERN_NOTICE "apm: overridden by ACPI.\n"); apm_info.disabled = 1; return -ENODEV; } -#ifdef CONFIG_PM_LEGACY - pm_active = 1; -#endif + pm_flags |= PM_APM; /* * Set up a segment that references the real mode segment 0x40 @@ -2366,9 +2364,7 @@ static void __exit apm_exit(void) kthread_stop(kapmd_task); kapmd_task = NULL; } -#ifdef CONFIG_PM_LEGACY - pm_active = 0; -#endif + pm_flags &= ~PM_APM; } module_init(apm_init); |