net/virtio-user: fix device init in legacy-mem mode

In legacy-mem mode, memory event callback registering is not supported,
we should not return error in dev_init on this case.

Fixes: 12ecb2f63b12 ("net/virtio-user: support memory hotplug")

Suggested-by: Tiwei Bie <tiwei.bie@intel.com>
Signed-off-by: Xiao Wang <xiao.w.wang@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c b/drivers/net/virtio/virtio_user/virtio_user_dev.c
index aff01f5..4322527 100644 (file)
--- a/drivers/net/virtio/virtio_user/virtio_user_dev.c
+++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c
@@ -447,8 +447,11 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues,
 
        if (rte_mem_event_callback_register(VIRTIO_USER_MEM_EVENT_CLB_NAME,
                                virtio_user_mem_event_cb, dev)) {
-               PMD_INIT_LOG(ERR, "Failed to register mem event callback\n");
-               return -1;
+               if (rte_errno != ENOTSUP) {
+                       PMD_INIT_LOG(ERR, "Failed to register mem event"
+                                       " callback\n");
+                       return -1;
+               }
        }
 
        return 0;