RDMA/hns: drop dead empty check in setup_root_hem()

setup_root_hem() reads the first entry of head->root and checks
the returned pointer against NULL:

    root_hem = list_first_entry(&head->root,
                                struct hns_roce_hem_item, list);
    if (!root_hem)
        return -ENOMEM;

list_first_entry() never returns NULL. On an empty list it returns
container_of(head, ..., list), a non-NULL garbage pointer that
aliases the head. So the check is dead.

The only caller adds an entry to head.root right before invoking
setup_root_hem():

    list_add(&root_hem->list, &head.root);
    ret = setup_root_hem(..., &head, ...);

So head.root is guaranteed non-empty on entry. Drop the check.

Link: https://patch.msgid.link/r/20260526054653.2054800-1-maoyixie.tju@gmail.com
Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Maoyi Xie <maoyixie.tju@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

0 files changed, 0 insertions, 0 deletions