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authorRafael J. Wysocki <rjw@sisk.pl>2011-10-17 01:26:49 +0400
committerRafael J. Wysocki <rjw@sisk.pl>2011-10-17 01:26:49 +0400
commit9bd717c0dc8224cadfd66df7eeff98c987711d98 (patch)
treebca8a9232d457d984d87da53b5ffadcb7dcd46be /drivers/base
parent7811ac276bb9f77aa6475110ef340c1bc3090def (diff)
parent857b36c7b038ac56a882ee914df93e5985443074 (diff)
downloadlinux-9bd717c0dc8224cadfd66df7eeff98c987711d98.tar.xz
Merge branch 'pm-runtime' into pm-for-linus
* pm-runtime: PM / Runtime: Handle .runtime_suspend() failure correctly PM / Runtime: Fix kerneldoc comment for rpm_suspend() PM / Runtime: Update document about callbacks
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/power/runtime.c33
1 files changed, 18 insertions, 15 deletions
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 7a6fb5e34a0e..6bb3aafa85ed 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -286,14 +286,16 @@ static int rpm_callback(int (*cb)(struct device *), struct device *dev)
* @dev: Device to suspend.
* @rpmflags: Flag bits.
*
- * Check if the device's runtime PM status allows it to be suspended. If
- * another suspend has been started earlier, either return immediately or wait
- * for it to finish, depending on the RPM_NOWAIT and RPM_ASYNC flags. Cancel a
- * pending idle notification. If the RPM_ASYNC flag is set then queue a
- * suspend request; otherwise run the ->runtime_suspend() callback directly.
- * If a deferred resume was requested while the callback was running then carry
- * it out; otherwise send an idle notification for the device (if the suspend
- * failed) or for its parent (if the suspend succeeded).
+ * Check if the device's runtime PM status allows it to be suspended.
+ * Cancel a pending idle notification, autosuspend or suspend. If
+ * another suspend has been started earlier, either return immediately
+ * or wait for it to finish, depending on the RPM_NOWAIT and RPM_ASYNC
+ * flags. If the RPM_ASYNC flag is set then queue a suspend request;
+ * otherwise run the ->runtime_suspend() callback directly. When
+ * ->runtime_suspend succeeded, if a deferred resume was requested while
+ * the callback was running then carry it out, otherwise send an idle
+ * notification for its parent (if the suspend succeeded and both
+ * ignore_children of parent->power and irq_safe of dev->power are not set).
*
* This function must be called under dev->power.lock with interrupts disabled.
*/
@@ -418,15 +420,16 @@ static int rpm_suspend(struct device *dev, int rpmflags)
dev->power.runtime_error = 0;
else
pm_runtime_cancel_pending(dev);
- } else {
+ wake_up_all(&dev->power.wait_queue);
+ goto out;
+ }
no_callback:
- __update_runtime_status(dev, RPM_SUSPENDED);
- pm_runtime_deactivate_timer(dev);
+ __update_runtime_status(dev, RPM_SUSPENDED);
+ pm_runtime_deactivate_timer(dev);
- if (dev->parent) {
- parent = dev->parent;
- atomic_add_unless(&parent->power.child_count, -1, 0);
- }
+ if (dev->parent) {
+ parent = dev->parent;
+ atomic_add_unless(&parent->power.child_count, -1, 0);
}
wake_up_all(&dev->power.wait_queue);