rpc: Refactor cleanup paths in virNetLibsshAuthenticatePassword

Now that the memory disposal is handled automatically we can simplify
the cleanup paths. In this case it's not as simple as sometimes the
value of the called function is returned.

While at it fix the initialization value of the returned variable.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/rpc/virnetlibsshsession.c

@@ -606,25 +606,22 @@ virNetLibsshAuthenticatePassword(virNetLibsshSessionPtr sess,
                                  virNetLibsshAuthMethodPtr priv)
 {
     const char *errmsg;
-    int ret = -1;
+    int rc = SSH_AUTH_ERROR;
 
     VIR_DEBUG("sess=%p", sess);
 
     if (priv->password) {
         /* tunelled password authentication */
-        if ((ret = ssh_userauth_password(sess->session, NULL,
-                                         priv->password)) == 0) {
-            ret = SSH_AUTH_SUCCESS;
-            goto cleanup;
-        }
+        if ((rc = ssh_userauth_password(sess->session, NULL,
+                                        priv->password)) == 0)
+            return SSH_AUTH_SUCCESS;
     } else {
         /* password authentication with interactive password request */
         if (!sess->cred || !sess->cred->cb) {
             virReportError(VIR_ERR_LIBSSH, "%s",
                            _("Can't perform authentication: "
                              "Authentication callback not provided"));
-            ret = SSH_AUTH_ERROR;
-            goto cleanup;
+            return SSH_AUTH_ERROR;
         }
 
         /* Try the authenticating the set amount of times. The server breaks the
@@ -634,19 +631,15 @@ virNetLibsshAuthenticatePassword(virNetLibsshSessionPtr sess,
 
             if (!(password = virAuthGetPasswordPath(sess->authPath, sess->cred,
                                                     "ssh", sess->username,
-                                                    sess->hostname))) {
-                ret = SSH_AUTH_ERROR;
-                goto cleanup;
-            }
+                                                    sess->hostname)))
+                return SSH_AUTH_ERROR;
 
             /* tunelled password authentication */
-            if ((ret = ssh_userauth_password(sess->session, NULL,
-                                             password)) == 0) {
-                ret = SSH_AUTH_SUCCESS;
-                goto cleanup;
-            }
+            if ((rc = ssh_userauth_password(sess->session, NULL,
+                                            password)) == 0)
+                return SSH_AUTH_SUCCESS;
 
-            if (ret != SSH_AUTH_DENIED)
+            if (rc != SSH_AUTH_DENIED)
                 break;
         }
     }
@@ -655,9 +648,7 @@ virNetLibsshAuthenticatePassword(virNetLibsshSessionPtr sess,
     errmsg = ssh_get_error(sess->session);
     virReportError(VIR_ERR_AUTH_FAILED,
                    _("authentication failed: %s"), errmsg);
-
- cleanup:
-    return ret;
+    return rc;
 }
 
 /* perform keyboard interactive authentication