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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-24 08:48:17 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-24 08:48:17 -0700 |
| commit | ef54b1bb2e4de212a89a2692a7b2efd70b5fb559 (patch) | |
| tree | 41f8a3f0b6bc234efb5151d7b6852babe7fe75a6 /drivers/acpi/sleep.c | |
| parent | 9fe9293d14e8418f29136216f0180f47270a916a (diff) | |
| parent | 1162cf6bc6c4650943735438e2be0785ea40a3c6 (diff) | |
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (34 commits)
ACPI, i915: Register ACPI video even when not modesetting
Revert "ACPICA: delete check for AML access to port 0x81-83"
I/O port protection: update for windows compatibility.
sony-laptop: always try to unblock rfkill on load
sony-laptop: fix bogus error message display on resume
ACPI: EC: Fix ACPI EC resume non-query interrupt message
sony-laptop: SNC input event 38 fix
sony-laptop: SNC 127 Initialization Fix
sony-laptop: Duplicate SNC 127 Event Fix
ACPI: prevent processor.max_cstate=0 boot crash
ACPI/hpet: prevent boot hang when hpet=force used on ICH-4M
ACPI: delete obsolete "bus master activity" proc field
ACPI: idle: mark_tsc_unstable() at init-time, not run-time
ACPI: add /sys/firmware/acpi/interrupts/sci_not counter
ACPI video: fix an error when the brightness levels on AC and on Battery are same
acpi-cpufreq: Do not let get_measured perf depend on internal variable
acpi-cpufreq: style-only: add parens to math expression
acpi-cpufreq: Cleanup: Use printk_once
x86, acpi_cpufreq: Fix the NULL pointer dereference in get_measured_perf
thinkpad-acpi: bump up version to 0.23
...
Diffstat (limited to 'drivers/acpi/sleep.c')
| -rw-r--r-- | drivers/acpi/sleep.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index d060e6fd7fd..01574a06653 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -713,6 +713,32 @@ static void acpi_power_off(void) acpi_enter_sleep_state(ACPI_STATE_S5); } +/* + * ACPI 2.0 created the optional _GTS and _BFS, + * but industry adoption has been neither rapid nor broad. + * + * Linux gets into trouble when it executes poorly validated + * paths through the BIOS, so disable _GTS and _BFS by default, + * but do speak up and offer the option to enable them. + */ +void __init acpi_gts_bfs_check(void) +{ + acpi_handle dummy; + + if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_NAME__GTS, &dummy))) + { + printk(KERN_NOTICE PREFIX "BIOS offers _GTS\n"); + printk(KERN_NOTICE PREFIX "If \"acpi.gts=1\" improves suspend, " + "please notify linux-acpi@vger.kernel.org\n"); + } + if (ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT, METHOD_NAME__BFS, &dummy))) + { + printk(KERN_NOTICE PREFIX "BIOS offers _BFS\n"); + printk(KERN_NOTICE PREFIX "If \"acpi.bfs=1\" improves resume, " + "please notify linux-acpi@vger.kernel.org\n"); + } +} + int __init acpi_sleep_init(void) { acpi_status status; @@ -771,5 +797,6 @@ int __init acpi_sleep_init(void) * object can also be evaluated when the system enters S5. */ register_reboot_notifier(&tts_notifier); + acpi_gts_bfs_check(); return 0; } |