diff mbox series

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

Message ID 20210407034456.516204-2-saravanak@google.com (mailing list archive)
State Under Review
Headers show
Series Add sync_state() support to clock framework | expand

Commit Message

Saravana Kannan April 7, 2021, 3:44 a.m. UTC
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(+)

Comments

Greg KH April 8, 2021, 6:41 a.m. UTC | #1
On Tue, Apr 06, 2021 at 08:44:54PM -0700, Saravana Kannan wrote:
> 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>

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff mbox series

Patch

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
  */