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| author | Len Brown <len.brown@intel.com> | 2009-12-30 18:32:32 -0500 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-12-30 18:32:32 -0500 |
| commit | 1201b2a9bec0413188ada1443ece1a52da6dbff4 (patch) | |
| tree | 95f261a3e24071b24b9b31e4776a96368cd34d4c /drivers | |
| parent | cccc67a4cf52a952e6371ac75510994e0bddec96 (diff) | |
| parent | d7f0eea9e431e1b8b0742a74db1a9490730b2a25 (diff) | |
| download | linux-1201b2a9bec0413188ada1443ece1a52da6dbff4.tar.bz2 | |
Merge branch 'resume-sci-force-bootparam' into release
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/acpi/sleep.c | 29 |
1 files changed, 17 insertions, 12 deletions
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index 5f2c379ab7bf..79d33d908b5a 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -81,6 +81,23 @@ static int acpi_sleep_prepare(u32 acpi_state) #ifdef CONFIG_ACPI_SLEEP static u32 acpi_target_sleep_state = ACPI_STATE_S0; /* + * According to the ACPI specification the BIOS should make sure that ACPI is + * enabled and SCI_EN bit is set on wake-up from S1 - S3 sleep states. Still, + * some BIOSes don't do that and therefore we use acpi_enable() to enable ACPI + * on such systems during resume. Unfortunately that doesn't help in + * particularly pathological cases in which SCI_EN has to be set directly on + * resume, although the specification states very clearly that this flag is + * owned by the hardware. The set_sci_en_on_resume variable will be set in such + * cases. + */ +static bool set_sci_en_on_resume; + +void __init acpi_set_sci_en_on_resume(void) +{ + set_sci_en_on_resume = true; +} + +/* * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the * user to request that behavior by using the 'acpi_old_suspend_ordering' * kernel command line option that causes the following variable to be set. @@ -170,18 +187,6 @@ static void acpi_pm_end(void) #endif /* CONFIG_ACPI_SLEEP */ #ifdef CONFIG_SUSPEND -/* - * According to the ACPI specification the BIOS should make sure that ACPI is - * enabled and SCI_EN bit is set on wake-up from S1 - S3 sleep states. Still, - * some BIOSes don't do that and therefore we use acpi_enable() to enable ACPI - * on such systems during resume. Unfortunately that doesn't help in - * particularly pathological cases in which SCI_EN has to be set directly on - * resume, although the specification states very clearly that this flag is - * owned by the hardware. The set_sci_en_on_resume variable will be set in such - * cases. - */ -static bool set_sci_en_on_resume; - extern void do_suspend_lowlevel(void); static u32 acpi_suspend_states[] = { |