hw/rdma: fix clang compilation errors

Fix some enum castings and extra parentheses.
Reported-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMarcel Apfelbaum <marcel@redhat.com>
Message-Id: <20180321140316.96045-1-marcel@redhat.com>
Reviewed-by: NYuval Shaia <yuval.shaia@oracle.com>

hw/rdma/vmw/pvrdma_cmd.c

@@ -73,7 +73,7 @@ static void *pvrdma_map_to_pdir(PCIDevice *pdev, uint64_t pdir_dma,
     tbl_idx = 1;
     addr_idx = 1;
     while (addr_idx < nchunks) {
-        if ((tbl_idx == (TARGET_PAGE_SIZE / sizeof(uint64_t)))) {
+        if (tbl_idx == TARGET_PAGE_SIZE / sizeof(uint64_t)) {
             tbl_idx = 0;
             dir_idx++;
             pr_dbg("Mapping to table %d\n", dir_idx);
@@ -507,7 +507,8 @@ static int modify_qp(PVRDMADev *dev, union pvrdma_cmd_req *req,
     rsp->hdr.err = rdma_rm_modify_qp(&dev->rdma_dev_res, &dev->backend_dev,
                                  cmd->qp_handle, cmd->attr_mask,
                                  (union ibv_gid *)&cmd->attrs.ah_attr.grh.dgid,
-                                 cmd->attrs.dest_qp_num, cmd->attrs.qp_state,
+                                 cmd->attrs.dest_qp_num,
+                                 (enum ibv_qp_state)cmd->attrs.qp_state,
                                  cmd->attrs.qkey, cmd->attrs.rq_psn,
                                  cmd->attrs.sq_psn);
 

hw/rdma/vmw/pvrdma_main.c

@@ -91,7 +91,7 @@ static int init_dev_ring(PvrdmaRing *ring, struct pvrdma_ring **ring_state,
         goto out_free_tbl;
     }
     /* RX ring is the second */
-    (struct pvrdma_ring *)(*ring_state)++;
+    (*ring_state)++;
     rc = pvrdma_ring_init(ring, name, pci_dev,
                           (struct pvrdma_ring *)*ring_state,
                           (num_pages - 1) * TARGET_PAGE_SIZE /
@@ -292,7 +292,7 @@ static void init_ports(PVRDMADev *dev, Error **errp)
     memset(dev->rdma_dev_res.ports, 0, sizeof(dev->rdma_dev_res.ports));
 
     for (i = 0; i < MAX_PORTS; i++) {
-        dev->rdma_dev_res.ports[i].state = PVRDMA_PORT_DOWN;
+        dev->rdma_dev_res.ports[i].state = IBV_PORT_DOWN;
 
         dev->rdma_dev_res.ports[i].pkey_tbl =
             g_malloc0(sizeof(*dev->rdma_dev_res.ports[i].pkey_tbl) *