3 files changed, 41 insertions, 19 deletions

diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index cdfc87629efb..4d2b2ad1ee0e 100644
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -5854,9 +5854,10 @@ static int __init init_binder_device(const char *name)
 static int __init binder_init(void)
 {
         int ret;
-        char *device_name, *device_names, *device_tmp;
+        char *device_name, *device_tmp;
         struct binder_device *device;
         struct hlist_node *tmp;
+        char *device_names = NULL;
 
         ret = binder_alloc_shrinker_init();
         if (ret)
@@ -5898,23 +5899,29 @@ static int __init binder_init(void)
                                     &transaction_log_fops);
         }
 
-        /*
-         * Copy the module_parameter string, because we don't want to
-         * tokenize it in-place.
-         */
-        device_names = kstrdup(binder_devices_param, GFP_KERNEL);
-        if (!device_names) {
-                ret = -ENOMEM;
-                goto err_alloc_device_names_failed;
-        }
+        if (strcmp(binder_devices_param, "") != 0) {
+                /*
+                * Copy the module_parameter string, because we don't want to
+                * tokenize it in-place.
+                 */
+                device_names = kstrdup(binder_devices_param, GFP_KERNEL);
+                if (!device_names) {
+                        ret = -ENOMEM;
+                        goto err_alloc_device_names_failed;
+                }
 
-        device_tmp = device_names;
-        while ((device_name = strsep(&device_tmp, ","))) {
-                ret = init_binder_device(device_name);
-                if (ret)
-                        goto err_init_binder_device_failed;
+                device_tmp = device_names;
+                while ((device_name = strsep(&device_tmp, ","))) {
+                        ret = init_binder_device(device_name);
+                        if (ret)
+                                goto err_init_binder_device_failed;
+                }
         }
 
+        ret = init_binderfs();
+        if (ret)
+                goto err_init_binder_device_failed;
+
         return ret;
 
 err_init_binder_device_failed:
diff --git a/drivers/android/binder_internal.h b/drivers/android/binder_internal.h
index 7fb97f503ef2..045b3e42d98b 100644
--- a/drivers/android/binder_internal.h
+++ b/drivers/android/binder_internal.h
@@ -46,4 +46,13 @@ static inline bool is_binderfs_device(const struct inode *inode)
 }
 #endif
 
+#ifdef CONFIG_ANDROID_BINDERFS
+extern int __init init_binderfs(void);
+#else
+static inline int __init init_binderfs(void)
+{
+        return 0;
+}
+#endif
+
 #endif /* _LINUX_BINDER_INTERNAL_H */
diff --git a/drivers/android/binderfs.c b/drivers/android/binderfs.c
index 6a2185eb66c5..e773f45d19d9 100644
--- a/drivers/android/binderfs.c
+++ b/drivers/android/binderfs.c
@@ -395,6 +395,11 @@ static int binderfs_binder_ctl_create(struct super_block *sb)
         struct inode *inode = NULL;
         struct dentry *root = sb->s_root;
         struct binderfs_info *info = sb->s_fs_info;
+#if defined(CONFIG_IPC_NS)
+        bool use_reserve = (info->ipc_ns == &init_ipc_ns);
+#else
+        bool use_reserve = true;
+#endif
 
         device = kzalloc(sizeof(*device), GFP_KERNEL);
         if (!device)
@@ -413,7 +418,10 @@ static int binderfs_binder_ctl_create(struct super_block *sb)
 
         /* Reserve a new minor number for the new device. */
         mutex_lock(&binderfs_minors_mutex);
-        minor = ida_alloc_max(&binderfs_minors, BINDERFS_MAX_MINOR, GFP_KERNEL);
+        minor = ida_alloc_max(&binderfs_minors,
+                              use_reserve ? BINDERFS_MAX_MINOR :
+                                            BINDERFS_MAX_MINOR_CAPPED,
+                              GFP_KERNEL);
         mutex_unlock(&binderfs_minors_mutex);
         if (minor < 0) {
                 ret = minor;
@@ -542,7 +550,7 @@ static struct file_system_type binder_fs_type = {
         .fs_flags       = FS_USERNS_MOUNT,
 };
 
-static int __init init_binderfs(void)
+int __init init_binderfs(void)
 {
         int ret;
 
@@ -560,5 +568,3 @@ static int __init init_binderfs(void)
 
         return ret;
 }
-
-device_initcall(init_binderfs);