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-rw-r--r--drivers/base/power/main.c11
-rw-r--r--include/linux/pm.h2
2 files changed, 13 insertions, 0 deletions
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 6efef9fb23a1..0e26a6f6fd48 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -1046,3 +1046,14 @@ void __suspend_report_result(const char *function, void *fn, int ret)
printk(KERN_ERR "%s(): %pF returns %d\n", function, fn, ret);
}
EXPORT_SYMBOL_GPL(__suspend_report_result);
+
+/**
+ * device_pm_wait_for_dev - Wait for suspend/resume of a device to complete.
+ * @dev: Device to wait for.
+ * @subordinate: Device that needs to wait for @dev.
+ */
+void device_pm_wait_for_dev(struct device *subordinate, struct device *dev)
+{
+ dpm_wait(dev, subordinate->power.async_suspend);
+}
+EXPORT_SYMBOL_GPL(device_pm_wait_for_dev);
diff --git a/include/linux/pm.h b/include/linux/pm.h
index 9c16cd20fc96..e80df06ad22a 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -512,6 +512,7 @@ extern void __suspend_report_result(const char *function, void *fn, int ret);
__suspend_report_result(__func__, fn, ret); \
} while (0)
+extern void device_pm_wait_for_dev(struct device *sub, struct device *dev);
#else /* !CONFIG_PM_SLEEP */
#define device_pm_lock() do {} while (0)
@@ -524,6 +525,7 @@ static inline int dpm_suspend_start(pm_message_t state)
#define suspend_report_result(fn, ret) do {} while (0)
+static inline void device_pm_wait_for_dev(struct device *a, struct device *b) {}
#endif /* !CONFIG_PM_SLEEP */
/* How to reorder dpm_list after device_move() */