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authorLinus Torvalds <torvalds@g5.osdl.org>2006-09-26 11:49:46 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-09-26 11:49:46 -0700
commitdd77a4ee0f3981693d4229aa1d57cea9e526ff47 (patch)
treecb486be20b950201103a03636cbb1e1d180f0098 /kernel/power
parente8216dee838c09776680a6f1a2e54d81f3cdfa14 (diff)
parent7e9f4b2d3e21e87c26025810413ef1592834e63b (diff)
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Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6
* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6: (47 commits) Driver core: Don't call put methods while holding a spinlock Driver core: Remove unneeded routines from driver core Driver core: Fix potential deadlock in driver core PCI: enable driver multi-threaded probe Driver Core: add ability for drivers to do a threaded probe sysfs: add proper sysfs_init() prototype drivers/base: check errors drivers/base: Platform notify needs to occur before drivers attach to the device v4l-dev2: handle __must_check add CONFIG_ENABLE_MUST_CHECK add __must_check to device management code Driver core: fixed add_bind_files() definition Driver core: fix comments in drivers/base/power/resume.c sysfs_remove_bin_file: no return value, dump_stack on error kobject: must_check fixes Driver core: add ability for devices to create and remove bin files Class: add support for class interfaces for devices Driver core: create devices/virtual/ tree Driver core: add device_rename function Driver core: add ability for classes to handle devices properly ...
Diffstat (limited to 'kernel/power')
-rw-r--r--kernel/power/Kconfig11
-rw-r--r--kernel/power/disk.c4
-rw-r--r--kernel/power/swsusp.c9
-rw-r--r--kernel/power/user.c2
4 files changed, 22 insertions, 4 deletions
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index 4b6e2f1..825068c 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 7c7b9b6..d722349 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 8ef677e..0b66659 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 2e4499f..72825c8 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();