6093 zfsctl_shares_lookup should only VN_RELE() on zfs_zget() success
Reviewed by: Gordon Ross <gwr@nexenta.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>

*** 19,28 ****
--- 19,29 ----
   * CDDL HEADER END
   */
  /*
   * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
   * Copyright (c) 2012, 2014 by Delphix. All rights reserved.
+  * Copyright 2015, OmniTI Computer Consulting, Inc. All rights reserved.
   */
  
  /*
   * ZFS control directory (a.k.a. ".zfs")
   *
*** 964,978 ****
  
          if (zfsvfs->z_shares_dir == 0) {
                  ZFS_EXIT(zfsvfs);
                  return (SET_ERROR(ENOTSUP));
          }
!         if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &dzp)) == 0)
                  error = VOP_LOOKUP(ZTOV(dzp), nm, vpp, pnp,
                      flags, rdir, cr, ct, direntflags, realpnp);
- 
          VN_RELE(ZTOV(dzp));
          ZFS_EXIT(zfsvfs);
  
          return (error);
  }
  
--- 965,980 ----
  
          if (zfsvfs->z_shares_dir == 0) {
                  ZFS_EXIT(zfsvfs);
                  return (SET_ERROR(ENOTSUP));
          }
!         if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &dzp)) == 0) {
                  error = VOP_LOOKUP(ZTOV(dzp), nm, vpp, pnp,
                      flags, rdir, cr, ct, direntflags, realpnp);
                  VN_RELE(ZTOV(dzp));
+         }
+ 
          ZFS_EXIT(zfsvfs);
  
          return (error);
  }