diff options
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/Kconfig | 11 | ||||
| -rw-r--r-- | kernel/power/disk.c | 4 | ||||
| -rw-r--r-- | kernel/power/swsusp.c | 9 | ||||
| -rw-r--r-- | kernel/power/user.c | 2 |
4 files changed, 22 insertions, 4 deletions
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig index 4b6e2f18e05..825068ca347 100644 --- a/kernel/power/Kconfig +++ b/kernel/power/Kconfig @@ -64,6 +64,17 @@ config PM_TRACE CAUTION: this option will cause your machine's real-time clock to be set to an invalid time after a resume. +config PM_SYSFS_DEPRECATED + bool "Driver model /sys/devices/.../power/state files (DEPRECATED)" + depends on PM && SYSFS + default n + help + The driver model started out with a sysfs file intended to provide + a userspace hook for device power management. This feature has never + worked very well, except for limited testing purposes, and so it will + be removed. It's not clear that a generic mechanism could really + handle the wide variability of device power states; any replacements + are likely to be bus or driver specific. config SOFTWARE_SUSPEND bool "Software Suspend" diff --git a/kernel/power/disk.c b/kernel/power/disk.c index 7c7b9b65e36..d7223494279 100644 --- a/kernel/power/disk.c +++ b/kernel/power/disk.c @@ -103,7 +103,7 @@ static void unprepare_processes(void) } /** - * pm_suspend_disk - The granpappy of power management. + * pm_suspend_disk - The granpappy of hibernation power management. * * If we're going through the firmware, then get it over with quickly. * @@ -212,7 +212,7 @@ static int software_resume(void) pr_debug("PM: Preparing devices for restore.\n"); - if ((error = device_suspend(PMSG_FREEZE))) { + if ((error = device_suspend(PMSG_PRETHAW))) { printk("Some devices failed to suspend\n"); swsusp_free(); goto Thaw; diff --git a/kernel/power/swsusp.c b/kernel/power/swsusp.c index 8ef677ea0ce..0b66659dc51 100644 --- a/kernel/power/swsusp.c +++ b/kernel/power/swsusp.c @@ -247,6 +247,9 @@ int swsusp_suspend(void) restore_processor_state(); Restore_highmem: restore_highmem(); + /* NOTE: device_power_up() is just a resume() for devices + * that suspended with irqs off ... no overall powerup. + */ device_power_up(); Enable_irqs: local_irq_enable(); @@ -256,8 +259,12 @@ Enable_irqs: int swsusp_resume(void) { int error; + local_irq_disable(); - if (device_power_down(PMSG_FREEZE)) + /* NOTE: device_power_down() is just a suspend() with irqs off; + * it has no special "power things down" semantics + */ + if (device_power_down(PMSG_PRETHAW)) printk(KERN_ERR "Some devices failed to power down, very bad\n"); /* We'll ignore saved state, but this gets preempt count (etc) right */ save_processor_state(); diff --git a/kernel/power/user.c b/kernel/power/user.c index 2e4499f3e4d..72825c853cd 100644 --- a/kernel/power/user.c +++ b/kernel/power/user.c @@ -196,7 +196,7 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp, snapshot_free_unused_memory(&data->handle); down(&pm_sem); pm_prepare_console(); - error = device_suspend(PMSG_FREEZE); + error = device_suspend(PMSG_PRETHAW); if (!error) { error = swsusp_resume(); device_resume(); |