From: David Brownell <[email protected]>
This patch is the first of this series that should actually change any
behavior ... by issuing the new event, now tha the rest of the kernel is
prepared to receive it.
This converts the PM core to issue the new PRETHAW message, which the rest of
the kernel is now ready to receive.
Signed-off-by: David Brownell <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Pavel Machek <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/base/power/suspend.c | 1 +
kernel/power/disk.c | 4 ++--
kernel/power/swsusp.c | 9 ++++++++-
kernel/power/user.c | 2 +-
4 files changed, 12 insertions(+), 4 deletions(-)
diff --git a/drivers/base/power/suspend.c b/drivers/base/power/suspend.c
index 0bda4a7..e86db83 100644
--- a/drivers/base/power/suspend.c
+++ b/drivers/base/power/suspend.c
@@ -34,6 +34,7 @@ static inline char *suspend_verb(u32 eve
switch (event) {
case PM_EVENT_SUSPEND: return "suspend";
case PM_EVENT_FREEZE: return "freeze";
+ case PM_EVENT_PRETHAW: return "prethaw";
default: return "(unknown suspend event)";
}
}
diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index e13e740..a3c34fb 100644
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -98,7 +98,7 @@ 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.
*
@@ -207,7 +207,7 @@ 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 17f669c..6275289 100644
--- a/kernel/power/swsusp.c
+++ b/kernel/power/swsusp.c
@@ -248,6 +248,9 @@ 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();
@@ -257,8 +260,12 @@ 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 3f1539f..5a8d060 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -191,7 +191,7 @@ static int snapshot_ioctl(struct inode *
}
down(&pm_sem);
pm_prepare_console();
- error = device_suspend(PMSG_FREEZE);
+ error = device_suspend(PMSG_PRETHAW);
if (!error) {
error = swsusp_resume();
device_resume();
--
1.4.2.1
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
