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

[Arnaud Pouliquen]

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.pouliq...@foss.st.com>
---
 drivers/rpmsg/rpmsg_char.c | 23 ++++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

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);
 
-- 
2.17.1