From 0c84ce268b69855919b6ac7edc8f11caf21e9c88 Mon Sep 17 00:00:00 2001 From: Kay Sievers Date: Sun, 1 Apr 2007 23:49:48 -0700 Subject: [PATCH] [PATCH] driver core: fix built-in drivers sysfs links built-in drivers had broken sysfs links that caused bootup hangs for certain driver unregistry sequences. Signed-off-by: Ingo Molnar Acked-by: Kay Sievers Signed-off-by: Greg KH Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/device.h | 1 + kernel/module.c | 18 ++++++++++++++---- 2 files changed, 15 insertions(+), 4 deletions(-) diff --git a/include/linux/device.h b/include/linux/device.h index caad9bba965..5cf30e95c8b 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -128,6 +128,7 @@ struct device_driver { struct module * owner; const char * mod_name; /* used for built-in modules */ + struct module_kobject * mkobj; int (*probe) (struct device * dev); int (*remove) (struct device * dev); diff --git a/kernel/module.c b/kernel/module.c index fbc51de6444..dcdb32b8b13 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -2384,8 +2384,13 @@ void module_add_driver(struct module *mod, struct device_driver *drv) /* Lookup built-in module entry in /sys/modules */ mkobj = kset_find_obj(&module_subsys.kset, drv->mod_name); - if (mkobj) + if (mkobj) { mk = container_of(mkobj, struct module_kobject, kobj); + /* remember our module structure */ + drv->mkobj = mk; + /* kset_find_obj took a reference */ + kobject_put(mkobj); + } } if (!mk) @@ -2405,17 +2410,22 @@ EXPORT_SYMBOL(module_add_driver); void module_remove_driver(struct device_driver *drv) { + struct module_kobject *mk = NULL; char *driver_name; if (!drv) return; sysfs_remove_link(&drv->kobj, "module"); - if (drv->owner && drv->owner->mkobj.drivers_dir) { + + if (drv->owner) + mk = &drv->owner->mkobj; + else if (drv->mkobj) + mk = drv->mkobj; + if (mk && mk->drivers_dir) { driver_name = make_driver_name(drv); if (driver_name) { - sysfs_remove_link(drv->owner->mkobj.drivers_dir, - driver_name); + sysfs_remove_link(mk->drivers_dir, driver_name); kfree(driver_name); } }