vhost: remove check around pthread_mutex_init

> pthread_mutex_init always returns 0. The other mutex functions
> return 0 on success and a non-zero error code on error.

Link: https://man7.org/linux/man-pages/man3/pthread_mutex_lock.3.html
Bugzilla ID: 1586
Cc: Maxime Coquelin <maxime.coquelin@redhat.com>
Cc: Chenbo Xia <chenbox@nvidia.com>
Signed-off-by: Ariel Otilibili <otilibil@eurecom.fr>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

lib/vhost/socket.c

@@ -497,11 +497,7 @@ vhost_user_reconnect_init(void)
 {
 	int ret;
 
-	ret = pthread_mutex_init(&reconn_list.mutex, NULL);
-	if (ret < 0) {
-		VHOST_CONFIG_LOG("thread", ERR, "%s: failed to initialize mutex", __func__);
-		return ret;
-	}
+	pthread_mutex_init(&reconn_list.mutex, NULL);
 	TAILQ_INIT(&reconn_list.head);
 
 	ret = rte_thread_create_internal_control(&reconn_tid, "vhost-reco",
@@ -920,11 +916,7 @@ rte_vhost_driver_register(const char *path, uint64_t flags)
 		goto out;
 	}
 	TAILQ_INIT(&vsocket->conn_list);
-	ret = pthread_mutex_init(&vsocket->conn_mutex, NULL);
-	if (ret) {
-		VHOST_CONFIG_LOG(path, ERR, "failed to init connection mutex");
-		goto out_free;
-	}
+	pthread_mutex_init(&vsocket->conn_mutex, NULL);
 
 	if (!strncmp("/dev/vduse/", path, strlen("/dev/vduse/")))
 		vsocket->is_vduse = true;
@@ -1033,8 +1025,6 @@ rte_vhost_driver_register(const char *path, uint64_t flags)
 	if (pthread_mutex_destroy(&vsocket->conn_mutex)) {
 		VHOST_CONFIG_LOG(path, ERR, "failed to destroy connection mutex");
 	}
-out_free:
-	vhost_user_socket_mem_free(vsocket);
 out:
 	pthread_mutex_unlock(&vhost_user.mutex);