[PATCH v5 13/16] rpmsg: char: introduce __rpmsg_chrdev_create_eptdev function

Arnaud Pouliquen
2021-02-19T11:20:56Z

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 --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