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path: root/drivers/dax/bus.c
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Diffstat (limited to 'drivers/dax/bus.c')
-rw-r--r--drivers/dax/bus.c29
1 files changed, 24 insertions, 5 deletions
diff --git a/drivers/dax/bus.c b/drivers/dax/bus.c
index 17af6fbc3be5..568168500217 100644
--- a/drivers/dax/bus.c
+++ b/drivers/dax/bus.c
@@ -9,6 +9,8 @@
#include "dax-private.h"
#include "bus.h"
+static struct class *dax_class;
+
static DEFINE_MUTEX(dax_bus_lock);
#define DAX_NAME_LEN 30
@@ -310,8 +312,8 @@ static void unregister_dev_dax(void *dev)
put_device(dev);
}
-struct dev_dax *devm_create_dev_dax(struct dax_region *dax_region, int id,
- struct dev_pagemap *pgmap)
+struct dev_dax *__devm_create_dev_dax(struct dax_region *dax_region, int id,
+ struct dev_pagemap *pgmap, enum dev_dax_subsys subsys)
{
struct device *parent = dax_region->dev;
struct dax_device *dax_dev;
@@ -350,7 +352,10 @@ struct dev_dax *devm_create_dev_dax(struct dax_region *dax_region, int id,
inode = dax_inode(dax_dev);
dev->devt = inode->i_rdev;
- dev->bus = &dax_bus_type;
+ if (subsys == DEV_DAX_BUS)
+ dev->bus = &dax_bus_type;
+ else
+ dev->class = dax_class;
dev->parent = parent;
dev->groups = dax_attribute_groups;
dev->release = dev_dax_release;
@@ -374,7 +379,7 @@ struct dev_dax *devm_create_dev_dax(struct dax_region *dax_region, int id,
return ERR_PTR(rc);
}
-EXPORT_SYMBOL_GPL(devm_create_dev_dax);
+EXPORT_SYMBOL_GPL(__devm_create_dev_dax);
static int match_always_count;
@@ -407,6 +412,7 @@ EXPORT_SYMBOL_GPL(__dax_driver_register);
void dax_driver_unregister(struct dax_device_driver *dax_drv)
{
+ struct device_driver *drv = &dax_drv->drv;
struct dax_id *dax_id, *_id;
mutex_lock(&dax_bus_lock);
@@ -416,15 +422,28 @@ void dax_driver_unregister(struct dax_device_driver *dax_drv)
kfree(dax_id);
}
mutex_unlock(&dax_bus_lock);
+ driver_unregister(drv);
}
EXPORT_SYMBOL_GPL(dax_driver_unregister);
int __init dax_bus_init(void)
{
- return bus_register(&dax_bus_type);
+ int rc;
+
+ if (IS_ENABLED(CONFIG_DEV_DAX_PMEM_COMPAT)) {
+ dax_class = class_create(THIS_MODULE, "dax");
+ if (IS_ERR(dax_class))
+ return PTR_ERR(dax_class);
+ }
+
+ rc = bus_register(&dax_bus_type);
+ if (rc)
+ class_destroy(dax_class);
+ return rc;
}
void __exit dax_bus_exit(void)
{
bus_unregister(&dax_bus_type);
+ class_destroy(dax_class);
}