sm_io_bootstrap.c: fix attach/init function calls inversion

It's better to first attach the SMIO to its
parent (its DEVIO handler) and then initialize
the SMIO.

The SMIO might need something from the
DEVIO.

src/sm_io/sm_io_bootstrap.c

@@ -63,13 +63,14 @@ void smio_startup (zsock_t *pipe, void *args)
     smio_t *self = smio_new (th_args, pipe_mgmt, pipe_msg, smio_service);
     ASSERT_ALLOC(self, err_self_alloc);
 
-    /* Call SMIO init function to finish initializing its internal strucutres */
-    smio_err_e err = SMIO_DISPATCH_FUNC_WRAPPER (init, smio_mod_dispatch);
-    ASSERT_TEST(err == SMIO_SUCCESS, "Could not initialize SMIO", err_call_init);
     /* Atach this SMIO instance to its parent */
-    err = smio_attach (self, th_args->parent);
+    smio_err_e err = smio_attach (self, th_args->parent);
     ASSERT_TEST(err == SMIO_SUCCESS, "Could not attach SMIO", err_call_attach);
 
+    /* Call SMIO init function to finish initializing its internal strucutres */
+    err = SMIO_DISPATCH_FUNC_WRAPPER (init, smio_mod_dispatch);
+    ASSERT_TEST(err == SMIO_SUCCESS, "Could not initialize SMIO", err_call_init);
+
     /* Export SMIO specific operations */
     const disp_op_t **smio_exp_ops = smio_get_exp_ops (self);
     ASSERT_TEST (smio_exp_ops != NULL, "Could not get SMIO exported operations",
@@ -88,13 +89,14 @@ err_smio_loop:
     /* Unexport SMIO specific operations */
     smio_unexport_ops (self);
 err_smio_export:
-    /* Deattach this SMIO instance to its parent */
-    smio_deattach (self);
+    /* Nullify exp ops */
+    smio_set_exp_ops (self, NULL);
 err_smio_get_exp_ops:
-err_call_attach:
     /* FIXME: Poll PIPE sockets and on receiving any message calls shutdown () */
     SMIO_DISPATCH_FUNC_WRAPPER (shutdown, smio_mod_dispatch);
 err_call_init:
+    smio_deattach (self);
+err_call_attach:
     /* Destroy what we did in _smio_new */
     smio_destroy (&self);
 err_self_alloc: