cleanpatch: a script to clean up stealth whitespace added by a patch

[sfrench/cifs-2.6.git] / lib / kobject_uevent.c

diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c
index a1922765ff315dfe1a90879f567c82e08521eaa2..12e311dc664cc8d58aa29264050e2f4a8f234e2c 100644 (file)
--- a/lib/kobject_uevent.c
+++ b/lib/kobject_uevent.c
@@ -42,10 +42,6 @@ static char *action_to_string(enum kobject_action action)
                return "remove";
        case KOBJ_CHANGE:
                return "change";
-       case KOBJ_MOUNT:
-               return "mount";
-       case KOBJ_UMOUNT:
-               return "umount";
        case KOBJ_OFFLINE:
                return "offline";
        case KOBJ_ONLINE:
@@ -63,8 +59,11 @@ static char *action_to_string(enum kobject_action action)
  * @action: action that is happening (usually KOBJ_MOVE)
  * @kobj: struct kobject that the action is happening to
  * @envp_ext: pointer to environmental data
+ *
+ * Returns 0 if kobject_uevent() is completed with success or the
+ * corresponding error when it fails.
  */
-void kobject_uevent_env(struct kobject *kobj, enum kobject_action action,
+int kobject_uevent_env(struct kobject *kobj, enum kobject_action action,
                        char *envp_ext[])
 {
        char **envp;
@@ -79,53 +78,65 @@ void kobject_uevent_env(struct kobject *kobj, enum kobject_action action,
        u64 seq;
        char *seq_buff;
        int i = 0;
-       int retval;
+       int retval = 0;
        int j;
 
        pr_debug("%s\n", __FUNCTION__);
 
        action_string = action_to_string(action);
-       if (!action_string)
-               return;
+       if (!action_string) {
+               pr_debug("kobject attempted to send uevent without action_string!\n");
+               return -EINVAL;
+       }
 
        /* search the kset we belong to */
        top_kobj = kobj;
-       if (!top_kobj->kset && top_kobj->parent) {
-               do {
-                       top_kobj = top_kobj->parent;
-               } while (!top_kobj->kset && top_kobj->parent);
+       while (!top_kobj->kset && top_kobj->parent) {
+               top_kobj = top_kobj->parent;
+       }
+       if (!top_kobj->kset) {
+               pr_debug("kobject attempted to send uevent without kset!\n");
+               return -EINVAL;
        }
-       if (!top_kobj->kset)
-               return;
 
        kset = top_kobj->kset;
        uevent_ops = kset->uevent_ops;
 
        /*  skip the event, if the filter returns zero. */
        if (uevent_ops && uevent_ops->filter)
-               if (!uevent_ops->filter(kset, kobj))
-                       return;
+               if (!uevent_ops->filter(kset, kobj)) {
+                       pr_debug("kobject filter function caused the event to drop!\n");
+                       return 0;
+               }
+
+       /* originating subsystem */
+       if (uevent_ops && uevent_ops->name)
+               subsystem = uevent_ops->name(kset, kobj);
+       else
+               subsystem = kobject_name(&kset->kobj);
+       if (!subsystem) {
+               pr_debug("unset subsytem caused the event to drop!\n");
+               return 0;
+       }
 
        /* environment index */
        envp = kzalloc(NUM_ENVP * sizeof (char *), GFP_KERNEL);
        if (!envp)
-               return;
+               return -ENOMEM;
 
        /* environment values */
        buffer = kmalloc(BUFFER_SIZE, GFP_KERNEL);
-       if (!buffer)
+       if (!buffer) {
+               retval = -ENOMEM;
                goto exit;
+       }
 
        /* complete object path */
        devpath = kobject_get_path(kobj, GFP_KERNEL);
-       if (!devpath)
+       if (!devpath) {
+               retval = -ENOENT;
                goto exit;
-
-       /* originating subsystem */
-       if (uevent_ops && uevent_ops->name)
-               subsystem = uevent_ops->name(kset, kobj);
-       else
-               subsystem = kobject_name(&kset->kobj);
+       }
 
        /* event environemnt for helper process only */
        envp[i++] = "HOME=/";
@@ -204,7 +215,7 @@ exit:
        kfree(devpath);
        kfree(buffer);
        kfree(envp);
-       return;
+       return retval;
 }
 
 EXPORT_SYMBOL_GPL(kobject_uevent_env);
@@ -214,10 +225,13 @@ EXPORT_SYMBOL_GPL(kobject_uevent_env);
  *
  * @action: action that is happening (usually KOBJ_ADD and KOBJ_REMOVE)
  * @kobj: struct kobject that the action is happening to
+ *
+ * Returns 0 if kobject_uevent() is completed with success or the
+ * corresponding error when it fails.
  */
-void kobject_uevent(struct kobject *kobj, enum kobject_action action)
+int kobject_uevent(struct kobject *kobj, enum kobject_action action)
 {
-       kobject_uevent_env(kobj, action, NULL);
+       return kobject_uevent_env(kobj, action, NULL);
 }
 
 EXPORT_SYMBOL_GPL(kobject_uevent);
@@ -277,7 +291,7 @@ EXPORT_SYMBOL_GPL(add_uevent_var);
 static int __init kobject_uevent_init(void)
 {
        uevent_sock = netlink_kernel_create(NETLINK_KOBJECT_UEVENT, 1, NULL,
-                                           THIS_MODULE);
+                                           NULL, THIS_MODULE);
 
        if (!uevent_sock) {
                printk(KERN_ERR