diff mbox series

[v4,13/16] rpmsg: char: introduce __rpmsg_chrdev_create_eptdev function

Message ID 20210217132905.1485-14-arnaud.pouliquen@foss.st.com (mailing list archive)
State Superseded
Headers show
Series introduce a generic IOCTL interface for RPMsg channels management | expand

Commit Message

Arnaud Pouliquen Feb. 17, 2021, 1:29 p.m. UTC 
Introduce the __rpmsg_chrdev_create_eptdev internal function that returns
the rpmsg_eptdev context structure.
This patch prepares the introduction of a RPMsg device for the
char device. the RPMsg device will need a reference to the context.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
---
 drivers/rpmsg/rpmsg_char.c | 23 ++++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c
index 09ae1304837c..66dcb8845d6c 100644
--- a/drivers/rpmsg/rpmsg_char.c
+++ b/drivers/rpmsg/rpmsg_char.c
@@ -328,8 +328,9 @@  int rpmsg_chrdev_eptdev_destroy(struct device *dev, void *data)
 }
 EXPORT_SYMBOL(rpmsg_chrdev_eptdev_destroy);
 
-int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent,
-			       struct rpmsg_channel_info chinfo)
+static struct rpmsg_eptdev *__rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev,
+							 struct device *parent,
+							 struct rpmsg_channel_info chinfo)
 {
 	struct rpmsg_eptdev *eptdev;
 	struct device *dev;
@@ -337,7 +338,7 @@  int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent
 
 	eptdev = kzalloc(sizeof(*eptdev), GFP_KERNEL);
 	if (!eptdev)
-		return -ENOMEM;
+		return ERR_PTR(-ENOMEM);
 
 	dev = &eptdev->dev;
 	eptdev->rpdev = rpdev;
@@ -381,7 +382,7 @@  int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent
 		put_device(dev);
 	}
 
-	return ret;
+	return eptdev;
 
 free_ept_ida:
 	ida_simple_remove(&rpmsg_ept_ida, dev->id);
@@ -391,7 +392,19 @@  int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent
 	put_device(dev);
 	kfree(eptdev);
 
-	return ret;
+	return ERR_PTR(ret);
+}
+
+int rpmsg_chrdev_create_eptdev(struct rpmsg_device *rpdev, struct device *parent,
+			       struct rpmsg_channel_info chinfo)
+{
+	struct rpmsg_eptdev *eptdev;
+
+	eptdev = __rpmsg_chrdev_create_eptdev(rpdev, &rpdev->dev, chinfo);
+	if (IS_ERR(eptdev))
+		return PTR_ERR(eptdev);
+
+	return 0;
 }
 EXPORT_SYMBOL(rpmsg_chrdev_create_eptdev);