diff mbox series

[v3,01/23] counter: Use container_of instead of drvdata to track counter_device

Message ID 20211229154441.38045-2-u.kleine-koenig@pengutronix.de (mailing list archive)
State Handled Elsewhere
Headers show
Series counter: cleanups and device lifetime fixes | expand

Commit Message

Uwe Kleine-König Dec. 29, 2021, 3:44 p.m. UTC 
The counter core uses drvdata to find a struct counter_device from a
struct device. However as the device is a member of struct counter_device,
the lookup can be done faster (and a bit type safe) using container_of.

There are no other users of drvdata, so the call to dev_set_drvdata can
go away, too.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 drivers/counter/counter-core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/counter/counter-core.c b/drivers/counter/counter-core.c
index 5acc54539623..f053a43c6c04 100644
--- a/drivers/counter/counter-core.c
+++ b/drivers/counter/counter-core.c
@@ -26,7 +26,8 @@  static DEFINE_IDA(counter_ida);
 
 static void counter_device_release(struct device *dev)
 {
-	struct counter_device *const counter = dev_get_drvdata(dev);
+	struct counter_device *const counter =
+		container_of(dev, struct counter_device, dev);
 
 	counter_chrdev_remove(counter);
 	ida_free(&counter_ida, dev->id);
@@ -78,7 +79,6 @@  int counter_register(struct counter_device *const counter)
 		dev->of_node = counter->parent->of_node;
 	}
 	device_initialize(dev);
-	dev_set_drvdata(dev, counter);
 
 	err = counter_sysfs_add(counter);
 	if (err < 0)