A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-29 03:01:39 -04:00
Code Issues Projects Releases Packages Wiki Activity

PM: Rework handling of interrupts during suspend-resume

Browse source 
Use the functions introduced in by the previous patch,
suspend_device_irqs(), resume_device_irqs() and check_wakeup_irqs(),
to rework the handling of interrupts during suspend (hibernation) and
resume.  Namely, interrupts will only be disabled on the CPU right
before suspending sysdevs, while device drivers will be prevented
from receiving interrupts, with the help of the new helper function,
before their "late" suspend callbacks run (and analogously during
resume).

In addition, since the device interrups are now disabled before the
CPU has turned all interrupts off and the CPU will ACK the interrupts
setting the IRQ_PENDING bit for them, check in sysdev_suspend() if
any wake-up interrupts are pending and abort suspend if that's the
case.

Signed-off-by: Rafael J. Wysocki <[email protected]>
Acked-by: Ingo Molnar <[email protected]>
This commit is contained in:
Rafael J. Wysocki 2009-03-16 22:34:06 +01:00
commit 2ed8d2b3a8
7 changed files with 83 additions and 40 deletions
Download patch file Download diff file Expand all files Collapse all files

16
drivers/xen/manage.c
View file

@ -39,12 +39,6 @@ static int xen_suspend(void *data)
BUG_ON(!irqs_disabled());
err = device_power_down(PMSG_SUSPEND);
if (err) {
printk(KERN_ERR "xen_suspend: device_power_down failed: %d\n",
err);
return err;
}
err = sysdev_suspend(PMSG_SUSPEND);
if (err) {
printk(KERN_ERR "xen_suspend: sysdev_suspend failed: %d\n",
@ -69,7 +63,6 @@ static int xen_suspend(void *data)
xen_mm_unpin_all();
sysdev_resume();
device_power_up(PMSG_RESUME);
if (!*cancelled) {
xen_irq_resume();
@ -108,6 +101,12 @@ static void do_suspend(void)
/* XXX use normal device tree? */
xenbus_suspend();
err = device_power_down(PMSG_SUSPEND);
if (err) {
printk(KERN_ERR "device_power_down failed: %d\n", err);
goto resume_devices;
}
err = stop_machine(xen_suspend, &cancelled, cpumask_of(0));
if (err) {
printk(KERN_ERR "failed to start xen_suspend: %d\n", err);
@ -120,6 +119,9 @@ static void do_suspend(void)
} else
xenbus_suspend_cancel();
device_power_up(PMSG_RESUME);
resume_devices:
device_resume(PMSG_RESUME);
/* Make sure timer events get retriggered on all CPUs */