8 files changed, 94 insertions, 64 deletions

diff --git a/Documentation/filesystems/configfs/configfs.txt b/Documentation/filesystems/configfs/configfs.txt
index 44c97e6accb2..15838d706ea2 100644
--- a/Documentation/filesystems/configfs/configfs.txt
+++ b/Documentation/filesystems/configfs/configfs.txt
@@ -233,10 +233,12 @@ accomplished via the group operations specified on the group's
 config_item_type.
 
         struct configfs_group_operations {
-                struct config_item *(*make_item)(struct config_group *group,
-                                                 const char *name);
-                struct config_group *(*make_group)(struct config_group *group,
-                                                   const char *name);
+                int (*make_item)(struct config_group *group,
+                                 const char *name,
+                                 struct config_item **new_item);
+                int (*make_group)(struct config_group *group,
+                                  const char *name,
+                                  struct config_group **new_group);
                 int (*commit_item)(struct config_item *item);
                 void (*disconnect_notify)(struct config_group *group,
                                           struct config_item *item);
diff --git a/Documentation/filesystems/configfs/configfs_example.c b/Documentation/filesystems/configfs/configfs_example.c
index 25151fd5c2c6..0b422acd470c 100644
--- a/Documentation/filesystems/configfs/configfs_example.c
+++ b/Documentation/filesystems/configfs/configfs_example.c
@@ -273,13 +273,13 @@ static inline struct simple_children *to_simple_children(struct config_item *ite
         return item ? container_of(to_config_group(item), struct simple_children, group) : NULL;
 }
 
-static struct config_item *simple_children_make_item(struct config_group *group, const char *name)
+static int simple_children_make_item(struct config_group *group, const char *name, struct config_item **new_item)
 {
         struct simple_child *simple_child;
 
         simple_child = kzalloc(sizeof(struct simple_child), GFP_KERNEL);
         if (!simple_child)
-                return NULL;
+                return -ENOMEM;
 
 
         config_item_init_type_name(&simple_child->item, name,
@@ -287,7 +287,8 @@ static struct config_item *simple_children_make_item(struct config_group *group,
 
         simple_child->storeme = 0;
 
-        return &simple_child->item;
+        *new_item = &simple_child->item;
+        return 0;
 }
 
 static struct configfs_attribute simple_children_attr_description = {
@@ -359,20 +360,21 @@ static struct configfs_subsystem simple_children_subsys = {
  * children of its own.
  */
 
-static struct config_group *group_children_make_group(struct config_group *group, const char *name)
+static int group_children_make_group(struct config_group *group, const char *name, struct config_group **new_group)
 {
         struct simple_children *simple_children;
 
         simple_children = kzalloc(sizeof(struct simple_children),
                                   GFP_KERNEL);
         if (!simple_children)
-                return NULL;
+                return -ENOMEM;
 
 
         config_group_init_type_name(&simple_children->group, name,
                                     &simple_children_type);
 
-        return &simple_children->group;
+        *new_group = &simple_children->group;
+        return 0;
 }
 
 static struct configfs_attribute group_children_attr_description = {
diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
index 665341e43055..387a13395015 100644
--- a/drivers/net/netconsole.c
+++ b/drivers/net/netconsole.c
@@ -585,8 +585,9 @@ static struct config_item_type netconsole_target_type = {
  * Group operations and type for netconsole_subsys.
  */
 
-static struct config_item *make_netconsole_target(struct config_group *group,
-                                                  const char *name)
+static int make_netconsole_target(struct config_group *group,
+                                  const char *name,
+                                  struct config_item **new_item)
 {
         unsigned long flags;
         struct netconsole_target *nt;
@@ -598,7 +599,7 @@ static struct config_item *make_netconsole_target(struct config_group *group,
         nt = kzalloc(sizeof(*nt), GFP_KERNEL);
         if (!nt) {
                 printk(KERN_ERR "netconsole: failed to allocate memory\n");
-                return NULL;
+                return -ENOMEM;
         }
 
         nt->np.name = "netconsole";
@@ -615,7 +616,8 @@ static struct config_item *make_netconsole_target(struct config_group *group,
         list_add(&nt->list, &target_list);
         spin_unlock_irqrestore(&target_list_lock, flags);
 
-        return &nt->item;
+        *new_item = &nt->item;
+        return 0;
 }
 
 static void drop_netconsole_target(struct config_group *group,
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index 614e382a6049..0e64312a084c 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -1073,25 +1073,24 @@ static int configfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
         group = NULL;
         item = NULL;
         if (type->ct_group_ops->make_group) {
-                group = type->ct_group_ops->make_group(to_config_group(parent_item), name);
-                if (group) {
+                ret = type->ct_group_ops->make_group(to_config_group(parent_item), name, &group);
+                if (!ret) {
                         link_group(to_config_group(parent_item), group);
                         item = &group->cg_item;
                 }
         } else {
-                item = type->ct_group_ops->make_item(to_config_group(parent_item), name);
-                if (item)
+                ret = type->ct_group_ops->make_item(to_config_group(parent_item), name, &item);
+                if (!ret)
                         link_obj(parent_item, item);
         }
         mutex_unlock(&subsys->su_mutex);
 
         kfree(name);
-        if (!item) {
+        if (ret) {
                 /*
-                 * If item == NULL, then link_obj() was never called.
+                 * If ret != 0, then link_obj() was never called.
                  * There are no extra references to clean up.
                  */
-                ret = -ENOMEM;
                 goto out_put;
         }
 
diff --git a/fs/dlm/config.c b/fs/dlm/config.c
index eac23bd288b2..492d8caaaf25 100644
--- a/fs/dlm/config.c
+++ b/fs/dlm/config.c
@@ -41,16 +41,20 @@ struct comm;
 struct nodes;
 struct node;
 
-static struct config_group *make_cluster(struct config_group *, const char *);
+static int make_cluster(struct config_group *, const char *,
+                        struct config_group **);
 static void drop_cluster(struct config_group *, struct config_item *);
 static void release_cluster(struct config_item *);
-static struct config_group *make_space(struct config_group *, const char *);
+static int make_space(struct config_group *, const char *,
+                      struct config_group **);
 static void drop_space(struct config_group *, struct config_item *);
 static void release_space(struct config_item *);
-static struct config_item *make_comm(struct config_group *, const char *);
+static int make_comm(struct config_group *, const char *,
+                     struct config_item **);
 static void drop_comm(struct config_group *, struct config_item *);
 static void release_comm(struct config_item *);
-static struct config_item *make_node(struct config_group *, const char *);
+static int make_node(struct config_group *, const char *,
+                     struct config_item **);
 static void drop_node(struct config_group *, struct config_item *);
 static void release_node(struct config_item *);
 
@@ -392,8 +396,8 @@ static struct node *to_node(struct config_item *i)
         return i ? container_of(i, struct node, item) : NULL;
 }
 
-static struct config_group *make_cluster(struct config_group *g,
-                                         const char *name)
+static int make_cluster(struct config_group *g, const char *name,
+                        struct config_group **new_g)
 {
         struct cluster *cl = NULL;
         struct spaces *sps = NULL;
@@ -431,14 +435,15 @@ static struct config_group *make_cluster(struct config_group *g,
 
         space_list = &sps->ss_group;
         comm_list = &cms->cs_group;
-        return &cl->group;
+        *new_g = &cl->group;
+        return 0;
 
  fail:
         kfree(cl);
         kfree(gps);
         kfree(sps);
         kfree(cms);
-        return NULL;
+        return -ENOMEM;
 }
 
 static void drop_cluster(struct config_group *g, struct config_item *i)
@@ -466,7 +471,8 @@ static void release_cluster(struct config_item *i)
         kfree(cl);
 }
 
-static struct config_group *make_space(struct config_group *g, const char *name)
+static int make_space(struct config_group *g, const char *name,
+                      struct config_group **new_g)
 {
         struct space *sp = NULL;
         struct nodes *nds = NULL;
@@ -489,13 +495,14 @@ static struct config_group *make_space(struct config_group *g, const char *name)
         INIT_LIST_HEAD(&sp->members);
         mutex_init(&sp->members_lock);
         sp->members_count = 0;
-        return &sp->group;
+        *new_g = &sp->group;
+        return 0;
 
  fail:
         kfree(sp);
         kfree(gps);
         kfree(nds);
-        return NULL;
+        return -ENOMEM;
 }
 
 static void drop_space(struct config_group *g, struct config_item *i)
@@ -522,19 +529,21 @@ static void release_space(struct config_item *i)
         kfree(sp);
 }
 
-static struct config_item *make_comm(struct config_group *g, const char *name)
+static int make_comm(struct config_group *g, const char *name,
+                     struct config_item **new_i)
 {
         struct comm *cm;
 
         cm = kzalloc(sizeof(struct comm), GFP_KERNEL);
         if (!cm)
-                return NULL;
+                return -ENOMEM;
 
         config_item_init_type_name(&cm->item, name, &comm_type);
         cm->nodeid = -1;
         cm->local = 0;
         cm->addr_count = 0;
-        return &cm->item;
+        *new_i = &cm->item;
+        return 0;
 }
 
 static void drop_comm(struct config_group *g, struct config_item *i)
@@ -554,14 +563,15 @@ static void release_comm(struct config_item *i)
         kfree(cm);
 }
 
-static struct config_item *make_node(struct config_group *g, const char *name)
+static int make_node(struct config_group *g, const char *name,
+                     struct config_item **new_i)
 {
         struct space *sp = to_space(g->cg_item.ci_parent);
         struct node *nd;
 
         nd = kzalloc(sizeof(struct node), GFP_KERNEL);
         if (!nd)
-                return NULL;
+                return -ENOMEM;
 
         config_item_init_type_name(&nd->item, name, &node_type);
         nd->nodeid = -1;
@@ -573,7 +583,8 @@ static struct config_item *make_node(struct config_group *g, const char *name)
         sp->members_count++;
         mutex_unlock(&sp->members_lock);
 
-        return &nd->item;
+        *new_i = &nd->item;
+        return 0;
 }
 
 static void drop_node(struct config_group *g, struct config_item *i)
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index f02ccb34604d..443d108211ab 100644
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -1489,25 +1489,28 @@ static struct o2hb_heartbeat_group *to_o2hb_heartbeat_group(struct config_group
                 : NULL;
 }
 
-static struct config_item *o2hb_heartbeat_group_make_item(struct config_group *group,
-                                                          const char *name)
+static int o2hb_heartbeat_group_make_item(struct config_group *group,
+                                          const char *name,
+                                          struct config_item **new_item)
 {
         struct o2hb_region *reg = NULL;
-        struct config_item *ret = NULL;
+        int ret = 0;
 
         reg = kzalloc(sizeof(struct o2hb_region), GFP_KERNEL);
-        if (reg == NULL)
-                goto out; /* ENOMEM */
+        if (reg == NULL) {
+                ret = -ENOMEM;
+                goto out;
+        }
 
         config_item_init_type_name(&reg->hr_item, name, &o2hb_region_type);
 
-        ret = &reg->hr_item;
+        *new_item = &reg->hr_item;
 
         spin_lock(&o2hb_live_lock);
         list_add_tail(&reg->hr_all_item, &o2hb_all_regions);
         spin_unlock(&o2hb_live_lock);
 out:
-        if (ret == NULL)
+        if (ret)
                 kfree(reg);
 
         return ret;
diff --git a/fs/ocfs2/cluster/nodemanager.c b/fs/ocfs2/cluster/nodemanager.c
index cfdb08b484ed..b364b7052e46 100644
--- a/fs/ocfs2/cluster/nodemanager.c
+++ b/fs/ocfs2/cluster/nodemanager.c
@@ -644,27 +644,32 @@ out:
         return ret;
 }
 
-static struct config_item *o2nm_node_group_make_item(struct config_group *group,
-                                                     const char *name)
+static int o2nm_node_group_make_item(struct config_group *group,
+                                     const char *name,
+                                     struct config_item **new_item)
 {
         struct o2nm_node *node = NULL;
-        struct config_item *ret = NULL;
+        int ret = 0;
 
-        if (strlen(name) > O2NM_MAX_NAME_LEN)
-                goto out; /* ENAMETOOLONG */
+        if (strlen(name) > O2NM_MAX_NAME_LEN) {
+                ret = -ENAMETOOLONG;
+                goto out;
+        }
 
         node = kzalloc(sizeof(struct o2nm_node), GFP_KERNEL);
-        if (node == NULL)
-                goto out; /* ENOMEM */
+        if (node == NULL) {
+                ret = -ENOMEM;
+                goto out;
+        }
 
         strcpy(node->nd_name, name); /* use item.ci_namebuf instead? */
         config_item_init_type_name(&node->nd_item, name, &o2nm_node_type);
         spin_lock_init(&node->nd_lock);
 
-        ret = &node->nd_item;
+        *new_item = &node->nd_item;
 
 out:
-        if (ret == NULL)
+        if (ret)
                 kfree(node);
 
         return ret;
@@ -751,25 +756,31 @@ static struct o2nm_cluster_group *to_o2nm_cluster_group(struct config_group *gro
 }
 #endif
 
-static struct config_group *o2nm_cluster_group_make_group(struct config_group *group,
-                                                          const char *name)
+static int o2nm_cluster_group_make_group(struct config_group *group,
+                                         const char *name,
+                                         struct config_group **new_group)
 {
         struct o2nm_cluster *cluster = NULL;
         struct o2nm_node_group *ns = NULL;
-        struct config_group *o2hb_group = NULL, *ret = NULL;
+        struct config_group *o2hb_group = NULL;
         void *defs = NULL;
+        int ret = 0;
 
         /* this runs under the parent dir's i_mutex; there can be only
          * one caller in here at a time */
-        if (o2nm_single_cluster)
-                goto out; /* ENOSPC */
+        if (o2nm_single_cluster) {
+                ret = -ENOSPC;
+                goto out;
+        }
 
         cluster = kzalloc(sizeof(struct o2nm_cluster), GFP_KERNEL);
         ns = kzalloc(sizeof(struct o2nm_node_group), GFP_KERNEL);
         defs = kcalloc(3, sizeof(struct config_group *), GFP_KERNEL);
         o2hb_group = o2hb_alloc_hb_set();
-        if (cluster == NULL || ns == NULL || o2hb_group == NULL || defs == NULL)
+        if (cluster == NULL || ns == NULL || o2hb_group == NULL || defs == NULL) {
+                ret = -ENOMEM;
                 goto out;
+        }
 
         config_group_init_type_name(&cluster->cl_group, name,
                                     &o2nm_cluster_type);
@@ -786,11 +797,11 @@ static struct config_group *o2nm_cluster_group_make_group(struct config_group *g
         cluster->cl_idle_timeout_ms    = O2NET_IDLE_TIMEOUT_MS_DEFAULT;
         cluster->cl_keepalive_delay_ms = O2NET_KEEPALIVE_DELAY_MS_DEFAULT;
 
-        ret = &cluster->cl_group;
+        *new_group = &cluster->cl_group;
         o2nm_single_cluster = cluster;
 
 out:
-        if (ret == NULL) {
+        if (ret) {
                 kfree(cluster);
                 kfree(ns);
                 o2hb_free_hb_set(o2hb_group);
diff --git a/include/linux/configfs.h b/include/linux/configfs.h
index 3ae65b1bf90f..0488f937634a 100644
--- a/include/linux/configfs.h
+++ b/include/linux/configfs.h
@@ -165,8 +165,8 @@ struct configfs_item_operations {
 };
 
 struct configfs_group_operations {
-        struct config_item *(*make_item)(struct config_group *group, const char *name);
-        struct config_group *(*make_group)(struct config_group *group, const char *name);
+        int (*make_item)(struct config_group *group, const char *name, struct config_item **new_item);
+        int (*make_group)(struct config_group *group, const char *name, struct config_group **new_group);
         int (*commit_item)(struct config_item *item);
         void (*disconnect_notify)(struct config_group *group, struct config_item *item);
         void (*drop_item)(struct config_group *group, struct config_item *item);