From: Saravana Kannan <saravanak@google.com>
Date: Fri, 21 Feb 2020 08:05:09 +0000 (-0800)
Subject: driver core: Add dev_has_sync_state()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=ac338acf514e7b578fa9e3742ec2c292323b4c1a;p=linux.git

driver core: Add dev_has_sync_state()

Add an API to check if a device has sync_state support in its driver or
bus.

Signed-off-by: Saravana Kannan <saravanak@google.com>
Link: https://lore.kernel.org/r/20200221080510.197337-3-saravanak@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/include/linux/device.h b/include/linux/device.h
index 0cd7c647c16c6..fa04dfd22bbcd 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -798,6 +798,17 @@ static inline struct device_node *dev_of_node(struct device *dev)
 	return dev->of_node;
 }
 
+static inline bool dev_has_sync_state(struct device *dev)
+{
+	if (!dev)
+		return false;
+	if (dev->driver && dev->driver->sync_state)
+		return true;
+	if (dev->bus && dev->bus->sync_state)
+		return true;
+	return false;
+}
+
 /*
  * High level routines for use by the bus drivers
  */