MODULES: add the module name for built in kernel drivers

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 24 insertions, 9 deletions

diff --git a/kernel/module.c b/kernel/module.c
index d0f2260a0210..0f4489af3e29 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -1131,8 +1131,8 @@ static int mod_sysfs_setup(struct module *mod,
         if (err)
                 goto out;
 
-        mod->drivers_dir = kobject_add_dir(&mod->mkobj.kobj, "drivers");
-        if (!mod->drivers_dir) {
+        mod->mkobj.drivers_dir = kobject_add_dir(&mod->mkobj.kobj, "drivers");
+        if (!mod->mkobj.drivers_dir) {
                 err = -ENOMEM;
                 goto out_unreg;
         }
@@ -1151,7 +1151,7 @@ static int mod_sysfs_setup(struct module *mod,
 out_unreg_param:
         module_param_sysfs_remove(mod);
 out_unreg_drivers:
-        kobject_unregister(mod->drivers_dir);
+        kobject_unregister(mod->mkobj.drivers_dir);
 out_unreg:
         kobject_del(&mod->mkobj.kobj);
         kobject_put(&mod->mkobj.kobj);
@@ -1163,7 +1163,7 @@ static void mod_kobject_remove(struct module *mod)
 {
         module_remove_modinfo_attrs(mod);
         module_param_sysfs_remove(mod);
-        kobject_unregister(mod->drivers_dir);
+        kobject_unregister(mod->mkobj.drivers_dir);
 
         kobject_unregister(&mod->mkobj.kobj);
 }
@@ -2344,15 +2344,30 @@ void module_add_driver(struct module *mod, struct device_driver *drv)
 {
         char *driver_name;
         int no_warn;
+        struct module_kobject *mk = NULL;
 
-        if (!mod || !drv)
+        if (!drv)
+                return;
+
+        if (mod)
+                mk = &mod->mkobj;
+        else if (drv->mod_name) {
+                struct kobject *mkobj;
+
+                /* Lookup built-in module entry in /sys/modules */
+                mkobj = kset_find_obj(&module_subsys.kset, drv->mod_name);
+                if (mkobj)
+                        mk = container_of(mkobj, struct module_kobject, kobj);
+        }
+
+        if (!mk)
                 return;
 
         /* Don't check return codes; these calls are idempotent */
-        no_warn = sysfs_create_link(&drv->kobj, &mod->mkobj.kobj, "module");
+        no_warn = sysfs_create_link(&drv->kobj, &mk->kobj, "module");
         driver_name = make_driver_name(drv);
         if (driver_name) {
-                no_warn = sysfs_create_link(mod->drivers_dir, &drv->kobj,
+                no_warn = sysfs_create_link(mk->drivers_dir, &drv->kobj,
                                             driver_name);
                 kfree(driver_name);
         }
@@ -2367,10 +2382,10 @@ void module_remove_driver(struct device_driver *drv)
                 return;
 
         sysfs_remove_link(&drv->kobj, "module");
-        if (drv->owner && drv->owner->drivers_dir) {
+        if (drv->owner && drv->owner->mkobj.drivers_dir) {
                 driver_name = make_driver_name(drv);
                 if (driver_name) {
-                        sysfs_remove_link(drv->owner->drivers_dir,
+                        sysfs_remove_link(drv->owner->mkobj.drivers_dir,
                                           driver_name);
                         kfree(driver_name);
                 }