[PATCH v1 1/2] driver core: Add dev_set_drv_sync_state()

Saravana Kannan
2021-04-07T03:45:05Z

This can be used by frameworks to set the sync_state() helper functions
for drivers that don't already have them set.

Signed-off-by: Saravana Kannan <saravanak@google.com>
---
include/linux/device.h | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/include/linux/device.h b/include/linux/device.h
index ba660731bd25..35e8833ca16b 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -778,6 +778,18 @@ static inline bool dev_has_sync_state(struct device *dev)
return false;
}

+static inline int dev_set_drv_sync_state(struct device *dev,
+ void (*fn)(struct device *dev))
+{
+ if (!dev || !dev->driver)
+ return 0;
+ if (dev->driver->sync_state && dev->driver->sync_state != fn)
+ return -EBUSY;
+ if (!dev->driver->sync_state)
+ dev->driver->sync_state = fn;
+ return 0;
+}
+
/*
* High level routines for use by the bus drivers
*/
--
2.31.1.295.g9ea45b61b8-goog