fuse: check s_root when destroying sb

Checking "fm" works because currently sb->s_fs_info is cleared on error
paths; however, sb->s_root is what generic_shutdown_super() checks to
determine whether the sb was fully initialized or not.

This change will allow cleanup of sb setup error paths.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 36cd031..60ceaf3 100644 (file)
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -1747,7 +1747,7 @@ static void fuse_sb_destroy(struct super_block *sb)
        struct fuse_mount *fm = get_fuse_mount_super(sb);
        bool last;
 
-       if (fm) {
+       if (sb->s_root) {
                last = fuse_mount_remove(fm);
                if (last)
                        fuse_conn_destroy(fm);

diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
index 0ad89c6..32fd138 100644 (file)
--- a/fs/fuse/virtio_fs.c
+++ b/fs/fuse/virtio_fs.c
@@ -1394,7 +1394,7 @@ static void virtio_kill_sb(struct super_block *sb)
        bool last;
 
        /* If mount failed, we can still be called without any fc */
-       if (fm) {
+       if (sb->s_root) {
                last = fuse_mount_remove(fm);
                if (last)
                        virtio_fs_conn_destroy(fm);