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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-11-27 03:37:53 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-11-27 03:37:53 +0300
commitaf261127e94c286c08bba162711307863fd4e68c (patch)
treed6dda7ab34c353a5d42653531b99fc30dd41721e /drivers/base
parent5d01410fe4d92081f349b013a2e7a95429e4f2c9 (diff)
parentb2b49ccbdd547135c69371ed066cffa44912060a (diff)
downloadlinux-af261127e94c286c08bba162711307863fd4e68c.tar.xz
Merge back earlier 'pm-runtime' material for 3.19-rc1.
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/power/runtime.c69
1 files changed, 33 insertions, 36 deletions
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 67c7938e430b..8f1ab8446caa 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -13,42 +13,39 @@
#include <trace/events/rpm.h>
#include "power.h"
-#define RPM_GET_CALLBACK(dev, cb) \
-({ \
- int (*__rpm_cb)(struct device *__d); \
- \
- if (dev->pm_domain) \
- __rpm_cb = dev->pm_domain->ops.cb; \
- else if (dev->type && dev->type->pm) \
- __rpm_cb = dev->type->pm->cb; \
- else if (dev->class && dev->class->pm) \
- __rpm_cb = dev->class->pm->cb; \
- else if (dev->bus && dev->bus->pm) \
- __rpm_cb = dev->bus->pm->cb; \
- else \
- __rpm_cb = NULL; \
- \
- if (!__rpm_cb && dev->driver && dev->driver->pm) \
- __rpm_cb = dev->driver->pm->cb; \
- \
- __rpm_cb; \
-})
-
-static int (*rpm_get_suspend_cb(struct device *dev))(struct device *)
-{
- return RPM_GET_CALLBACK(dev, runtime_suspend);
-}
+typedef int (*pm_callback_t)(struct device *);
-static int (*rpm_get_resume_cb(struct device *dev))(struct device *)
+static pm_callback_t __rpm_get_callback(struct device *dev, size_t cb_offset)
{
- return RPM_GET_CALLBACK(dev, runtime_resume);
+ pm_callback_t cb;
+ const struct dev_pm_ops *ops;
+
+ if (dev->pm_domain)
+ ops = &dev->pm_domain->ops;
+ else if (dev->type && dev->type->pm)
+ ops = dev->type->pm;
+ else if (dev->class && dev->class->pm)
+ ops = dev->class->pm;
+ else if (dev->bus && dev->bus->pm)
+ ops = dev->bus->pm;
+ else
+ ops = NULL;
+
+ if (ops)
+ cb = *(pm_callback_t *)((void *)ops + cb_offset);
+ else
+ cb = NULL;
+
+ if (!cb && dev->driver && dev->driver->pm)
+ cb = *(pm_callback_t *)((void *)dev->driver->pm + cb_offset);
+
+ return cb;
}
+#define RPM_GET_CALLBACK(dev, callback) \
+ __rpm_get_callback(dev, offsetof(struct dev_pm_ops, callback))
+
#ifdef CONFIG_PM_RUNTIME
-static int (*rpm_get_idle_cb(struct device *dev))(struct device *)
-{
- return RPM_GET_CALLBACK(dev, runtime_idle);
-}
static int rpm_resume(struct device *dev, int rpmflags);
static int rpm_suspend(struct device *dev, int rpmflags);
@@ -347,7 +344,7 @@ static int rpm_idle(struct device *dev, int rpmflags)
dev->power.idle_notification = true;
- callback = rpm_get_idle_cb(dev);
+ callback = RPM_GET_CALLBACK(dev, runtime_idle);
if (callback)
retval = __rpm_callback(callback, dev);
@@ -517,7 +514,7 @@ static int rpm_suspend(struct device *dev, int rpmflags)
__update_runtime_status(dev, RPM_SUSPENDING);
- callback = rpm_get_suspend_cb(dev);
+ callback = RPM_GET_CALLBACK(dev, runtime_suspend);
retval = rpm_callback(callback, dev);
if (retval)
@@ -737,7 +734,7 @@ static int rpm_resume(struct device *dev, int rpmflags)
__update_runtime_status(dev, RPM_RESUMING);
- callback = rpm_get_resume_cb(dev);
+ callback = RPM_GET_CALLBACK(dev, runtime_resume);
retval = rpm_callback(callback, dev);
if (retval) {
@@ -1431,7 +1428,7 @@ int pm_runtime_force_suspend(struct device *dev)
if (pm_runtime_status_suspended(dev))
return 0;
- callback = rpm_get_suspend_cb(dev);
+ callback = RPM_GET_CALLBACK(dev, runtime_suspend);
if (!callback) {
ret = -ENOSYS;
@@ -1467,7 +1464,7 @@ int pm_runtime_force_resume(struct device *dev)
int (*callback)(struct device *);
int ret = 0;
- callback = rpm_get_resume_cb(dev);
+ callback = RPM_GET_CALLBACK(dev, runtime_resume);
if (!callback) {
ret = -ENOSYS;