rdsv3_ib_send_grab_credits
if (!rdsv3_ib_send_grab_credits(ic, 1, &adv_credits, 0)) {
credit_alloc = rdsv3_ib_send_grab_credits(ic, work_alloc,
(void) rdsv3_ib_send_grab_credits(ic, 0, &posted, 1);
int rdsv3_ib_send_grab_credits(struct rdsv3_ib_connection *ic, uint32_t wanted,