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authorLinus Torvalds <torvalds@linux-foundation.org>2009-12-08 08:07:16 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-08 08:07:16 -0800
commitdad3de7d0090280f44ff27131ed2878f1ab6ddad (patch)
treef887c721761ce845037d96b59542198294a5d3a5 /drivers
parented9216c1717a3f3738a77908aff78995ea69e7ff (diff)
parent7a1a8eb58a2c6cd819d17332c5a2c369203635d5 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6: PM: Add flag for devices capable of generating run-time wake-up events PM / Runtime: Remove unnecessary braces in __pm_runtime_set_status() PM / Runtime: Make documentation of runtime_idle() agree with the code PM / Runtime: Ensure timer_expires is nonzero in pm_schedule_suspend() PM / Runtime: Use deferred_resume flag in pm_request_resume PM / Runtime: Export the PM runtime workqueue PM / Runtime: Fix lockdep warning in __pm_runtime_set_status() PM / Hibernate: Swap, use KERN_CONT PM / Hibernate: Shift remaining code from swsusp.c to hibernate.c PM / Hibernate: Move swap functions to kernel/power/swap.c. PM / freezer: Don't get over-anxious while waiting
Diffstat (limited to 'drivers')
-rw-r--r--drivers/base/power/runtime.c23
1 files changed, 13 insertions, 10 deletions
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 846d89e3d12..5a01ecef4af 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -185,6 +185,7 @@ int __pm_runtime_suspend(struct device *dev, bool from_wq)
}
dev->power.runtime_status = RPM_SUSPENDING;
+ dev->power.deferred_resume = false;
if (dev->bus && dev->bus->pm && dev->bus->pm->runtime_suspend) {
spin_unlock_irq(&dev->power.lock);
@@ -200,7 +201,6 @@ int __pm_runtime_suspend(struct device *dev, bool from_wq)
if (retval) {
dev->power.runtime_status = RPM_ACTIVE;
pm_runtime_cancel_pending(dev);
- dev->power.deferred_resume = false;
if (retval == -EAGAIN || retval == -EBUSY) {
notify = true;
@@ -217,7 +217,6 @@ int __pm_runtime_suspend(struct device *dev, bool from_wq)
wake_up_all(&dev->power.wait_queue);
if (dev->power.deferred_resume) {
- dev->power.deferred_resume = false;
__pm_runtime_resume(dev, false);
retval = -EAGAIN;
goto out;
@@ -626,6 +625,8 @@ int pm_schedule_suspend(struct device *dev, unsigned int delay)
goto out;
dev->power.timer_expires = jiffies + msecs_to_jiffies(delay);
+ if (!dev->power.timer_expires)
+ dev->power.timer_expires = 1;
mod_timer(&dev->power.suspend_timer, dev->power.timer_expires);
out:
@@ -659,13 +660,17 @@ static int __pm_request_resume(struct device *dev)
pm_runtime_deactivate_timer(dev);
+ if (dev->power.runtime_status == RPM_SUSPENDING) {
+ dev->power.deferred_resume = true;
+ return retval;
+ }
if (dev->power.request_pending) {
/* If non-resume request is pending, we can overtake it. */
dev->power.request = retval ? RPM_REQ_NONE : RPM_REQ_RESUME;
return retval;
- } else if (retval) {
- return retval;
}
+ if (retval)
+ return retval;
dev->power.request = RPM_REQ_RESUME;
dev->power.request_pending = true;
@@ -777,7 +782,7 @@ int __pm_runtime_set_status(struct device *dev, unsigned int status)
}
if (parent) {
- spin_lock(&parent->power.lock);
+ spin_lock_nested(&parent->power.lock, SINGLE_DEPTH_NESTING);
/*
* It is invalid to put an active child under a parent that is
@@ -786,12 +791,10 @@ int __pm_runtime_set_status(struct device *dev, unsigned int status)
*/
if (!parent->power.disable_depth
&& !parent->power.ignore_children
- && parent->power.runtime_status != RPM_ACTIVE) {
+ && parent->power.runtime_status != RPM_ACTIVE)
error = -EBUSY;
- } else {
- if (dev->power.runtime_status == RPM_SUSPENDED)
- atomic_inc(&parent->power.child_count);
- }
+ else if (dev->power.runtime_status == RPM_SUSPENDED)
+ atomic_inc(&parent->power.child_count);
spin_unlock(&parent->power.lock);