rpmsg: Create the rpmsg class in core instead of in rpmsg char
Migrate the creation of the rpmsg class from the rpmsg_char
to the core that the class is usable by the rpmsg_char and
the future rpmsg_ctrl module.
Suggested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220124102524.295783-3-arnaud.pouliquen@foss.st.com
diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c
index acb62b7..0ca8893 100644
--- a/drivers/rpmsg/rpmsg_char.c
+++ b/drivers/rpmsg/rpmsg_char.c
@@ -27,11 +27,11 @@
#include <uapi/linux/rpmsg.h>
#include "rpmsg_char.h"
+#include "rpmsg_internal.h"
#define RPMSG_DEV_MAX (MINORMASK + 1)
static dev_t rpmsg_major;
-static struct class *rpmsg_class;
static DEFINE_IDA(rpmsg_ctrl_ida);
static DEFINE_IDA(rpmsg_ept_ida);
@@ -550,17 +550,9 @@ static int rpmsg_chrdev_init(void)
return ret;
}
- rpmsg_class = class_create(THIS_MODULE, "rpmsg");
- if (IS_ERR(rpmsg_class)) {
- pr_err("failed to create rpmsg class\n");
- unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX);
- return PTR_ERR(rpmsg_class);
- }
-
ret = register_rpmsg_driver(&rpmsg_chrdev_driver);
if (ret < 0) {
pr_err("failed to register rpmsg driver\n");
- class_destroy(rpmsg_class);
unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX);
}
@@ -571,7 +563,6 @@ postcore_initcall(rpmsg_chrdev_init);
static void rpmsg_chrdev_exit(void)
{
unregister_rpmsg_driver(&rpmsg_chrdev_driver);
- class_destroy(rpmsg_class);
unregister_chrdev_region(rpmsg_major, RPMSG_DEV_MAX);
}
module_exit(rpmsg_chrdev_exit);
diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c
index d9e612f..79368a9 100644
--- a/drivers/rpmsg/rpmsg_core.c
+++ b/drivers/rpmsg/rpmsg_core.c
@@ -20,6 +20,9 @@
#include "rpmsg_internal.h"
+struct class *rpmsg_class;
+EXPORT_SYMBOL(rpmsg_class);
+
/**
* rpmsg_create_channel() - create a new rpmsg channel
* using its name and address info.
@@ -662,10 +665,17 @@ static int __init rpmsg_init(void)
{
int ret;
- ret = bus_register(&rpmsg_bus);
- if (ret)
- pr_err("failed to register rpmsg bus: %d\n", ret);
+ rpmsg_class = class_create(THIS_MODULE, "rpmsg");
+ if (IS_ERR(rpmsg_class)) {
+ pr_err("failed to create rpmsg class\n");
+ return PTR_ERR(rpmsg_class);
+ }
+ ret = bus_register(&rpmsg_bus);
+ if (ret) {
+ pr_err("failed to register rpmsg bus: %d\n", ret);
+ class_destroy(rpmsg_class);
+ }
return ret;
}
postcore_initcall(rpmsg_init);
@@ -673,6 +683,7 @@ postcore_initcall(rpmsg_init);
static void __exit rpmsg_fini(void)
{
bus_unregister(&rpmsg_bus);
+ class_destroy(rpmsg_class);
}
module_exit(rpmsg_fini);
diff --git a/drivers/rpmsg/rpmsg_internal.h b/drivers/rpmsg/rpmsg_internal.h
index b1245d3..4163162 100644
--- a/drivers/rpmsg/rpmsg_internal.h
+++ b/drivers/rpmsg/rpmsg_internal.h
@@ -18,6 +18,8 @@
#define to_rpmsg_device(d) container_of(d, struct rpmsg_device, dev)
#define to_rpmsg_driver(d) container_of(d, struct rpmsg_driver, drv)
+extern struct class *rpmsg_class;
+
/**
* struct rpmsg_device_ops - indirection table for the rpmsg_device operations
* @create_channel: create backend-specific channel, optional
