diff options
| author |   Alan Stern <stern@rowland.harvard.edu> | 2009-11-25 01:06:37 +0100 |
|---|---|---|
| committer |   Rafael J. Wysocki <rjw@sisk.pl> | 2009-11-29 16:51:27 +0100 |
| commit | 862f89b3d4c6bf3caab7fc69661fc6e725edd00a (patch) | |
| tree | 65d29f636f8c0f488524220b5accea674b5101cf /drivers/base | |
| parent | Merge branch 'i2c-pnx-fixes' of git://git.fluff.org/bjdooks/linux (diff) | |
| download | linux-dev-862f89b3d4c6bf3caab7fc69661fc6e725edd00a.tar.xz linux-dev-862f89b3d4c6bf3caab7fc69661fc6e725edd00a.zip | |
PM: fix irq enable/disable in runtime PM code
This patch (as1305) fixes a bug in the irq-enable settings and removes
some related overhead in the runtime PM code.
In __pm_runtime_resume(), within the scope of the original
spin_lock_irq(), we know that irqs are disabled. There's no
reason to go through a pair of enable/disable cycles when
acquiring and releasing the parent's lock.
In __pm_runtime_set_status(), irqs are already disabled when
the parent's lock is acquired, and they must remain disabled
when it is released.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/power/runtime.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c index a770498a74ec..846d89e3d122 100644 --- a/drivers/base/power/runtime.c +++ b/drivers/base/power/runtime.c @@ -328,11 +328,11 @@ int __pm_runtime_resume(struct device *dev, bool from_wq) * necessary. */ parent = dev->parent; - spin_unlock_irq(&dev->power.lock); + spin_unlock(&dev->power.lock); pm_runtime_get_noresume(parent); - spin_lock_irq(&parent->power.lock); + spin_lock(&parent->power.lock); /* * We can resume if the parent's run-time PM is disabled or it * is set to ignore children. @@ -343,9 +343,9 @@ int __pm_runtime_resume(struct device *dev, bool from_wq) if (parent->power.runtime_status != RPM_ACTIVE) retval = -EBUSY; } - spin_unlock_irq(&parent->power.lock); + spin_unlock(&parent->power.lock); - spin_lock_irq(&dev->power.lock); + spin_lock(&dev->power.lock); if (retval) goto out; goto repeat; @@ -777,7 +777,7 @@ int __pm_runtime_set_status(struct device *dev, unsigned int status) } if (parent) { - spin_lock_irq(&parent->power.lock); + spin_lock(&parent->power.lock); /* * It is invalid to put an active child under a parent that is @@ -793,7 +793,7 @@ int __pm_runtime_set_status(struct device *dev, unsigned int status) atomic_inc(&parent->power.child_count); } - spin_unlock_irq(&parent->power.lock); + spin_unlock(&parent->power.lock); if (error) goto out; |