diff options
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/sleep.c | 29 | ||||
| -rw-r--r-- | drivers/acpi/video.c | 8 |
2 files changed, 24 insertions, 13 deletions
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index 5f2c379..79d33d9 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[] = { diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 05dff63..72e76b4 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -999,8 +999,10 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device) sprintf(name, "acpi_video%d", count++); device->backlight = backlight_device_register(name, NULL, device, &acpi_backlight_ops); - device->backlight->props.max_brightness = device->brightness->count-3; kfree(name); + if (IS_ERR(device->backlight)) + return; + device->backlight->props.max_brightness = device->brightness->count-3; result = sysfs_create_link(&device->backlight->dev.kobj, &device->dev->dev.kobj, "device"); @@ -1979,6 +1981,10 @@ acpi_video_switch_brightness(struct acpi_video_device *device, int event) unsigned long long level_current, level_next; int result = -EINVAL; + /* no warning message if acpi_backlight=vendor is used */ + if (!acpi_video_backlight_support()) + return 0; + if (!device->brightness) goto out; |