dm: fix the memory leak in virtio mei

The possible memory leak was introduced by commit
7fce246

If mevent add fails in virtio mei, the resource allocated doesn't
be released. This patch fix this memory leak issue.

Tracked-On: #1877
Signed-off-by: Yin Fengwei <fengwei.yin@intel.com>

devicemodel/hw/pci/virtio/virtio_mei.c

@@ -373,6 +373,20 @@ vmei_set_status(struct virtio_mei *vmei, enum vmei_status status)
 		vmei->status = status;
 }
 
+static void
+vmei_rx_teardown(void *param)
+{
+	unsigned int i;
+	struct vmei_host_client *hclient = param;
+
+	if (hclient->client_fd > -1)
+		close(hclient->client_fd);
+	for (i = 0; i < VMEI_IOBUFS_MAX; i++)
+		free(hclient->send_bufs.bufs[i].iov_base);
+	free(hclient->recv_buf);
+	free(hclient);
+}
+
 static void
 vmei_host_client_destroy(const struct refcnt *ref)
 {
@@ -389,20 +403,8 @@ vmei_host_client_destroy(const struct refcnt *ref)
 
 	if (hclient->rx_mevp)
 		mevent_delete(hclient->rx_mevp);
-}
-
-static void
-vmei_rx_teardown(void *param)
-{
-	unsigned int i;
-	struct vmei_host_client *hclient = param;
-
-	if (hclient->client_fd > -1)
-		close(hclient->client_fd);
-	for (i = 0; i < VMEI_IOBUFS_MAX; i++)
-		free(hclient->send_bufs.bufs[i].iov_base);
-	free(hclient->recv_buf);
-	free(hclient);
+	else
+		vmei_rx_teardown(hclient);
 }
 
 static struct vmei_host_client *
@@ -977,6 +979,8 @@ static void vmei_del_reset_event(struct virtio_mei *vmei)
 {
 	if (vmei->reset_mevp)
 		mevent_delete_close(vmei->reset_mevp);
+	else
+		vmei_reset_teardown(vmei);
 }
 
 static void vmei_rx_callback(int fd, enum ev_type type, void *param);