[PATCH v2 2/4] rpmsg: char: Introduce __rpmsg_chrdev_create_eptdev function

Arnaud Pouliquen
2021-06-23T15:08:24Z

Introduce the __rpmsg_chrdev_create_eptdev internal function that returns
the rpmsg_eptdev context structure.

This patch prepares the introduction of a rpmsg channel 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 | 24 +++++++++++++++++++-----
1 file changed, 19 insertions(+), 5 deletions(-)

diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c
index fbe10d527c5c..50b7d4b00175 100644
--- a/drivers/rpmsg/rpmsg_char.c
+++ b/drivers/rpmsg/rpmsg_char.c
@@ -323,8 +323,9 @@ static void rpmsg_eptdev_release_device(struct device *dev)
kfree(eptdev);
}

-int rpmsg_chrdev_eptdev_create(struct rpmsg_device *rpdev, struct device *parent,
- struct rpmsg_channel_info chinfo)
+static struct rpmsg_eptdev *__rpmsg_chrdev_eptdev_create(struct rpmsg_device *rpdev,
+ struct device *parent,
+ struct rpmsg_channel_info chinfo)
{
struct rpmsg_eptdev *eptdev;
struct device *dev;
@@ -332,7 +333,7 @@ int rpmsg_chrdev_eptdev_create(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;
@@ -374,9 +375,10 @@ int rpmsg_chrdev_eptdev_create(struct rpmsg_device *rpdev, struct device *parent
if (ret) {
dev_err(dev, "device_add failed: %d\n", ret);
put_device(dev);
+ return ERR_PTR(ret);
}

- return ret;
+ return eptdev;

free_ept_ida:
ida_simple_remove(&rpmsg_ept_ida, dev->id);
@@ -386,7 +388,19 @@ int rpmsg_chrdev_eptdev_create(struct rpmsg_device *rpdev, struct device *parent
put_device(dev);
kfree(eptdev);

- return ret;
+ return ERR_PTR(ret);
+}
+
+int rpmsg_chrdev_eptdev_create(struct rpmsg_device *rpdev, struct device *parent,
+ struct rpmsg_channel_info chinfo)
+{
+ struct rpmsg_eptdev *eptdev;
+
+ eptdev = __rpmsg_chrdev_eptdev_create(rpdev, parent, chinfo);
+ if (IS_ERR(eptdev))
+ return PTR_ERR(eptdev);
+
+ return 0;
}
EXPORT_SYMBOL(rpmsg_chrdev_eptdev_create);

--
2.17.1