lib/librte_ethdev/ethdev_private.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2018 Gaëtan Rivet
   3  */
   4
   5 #include "rte_ethdev.h"
   6 #include "ethdev_private.h"
   7
   8 struct rte_eth_dev *
   9 eth_find_device(const struct rte_eth_dev *start, rte_eth_cmp_t cmp,
  10                 const void *data)
  11 {
  12         struct rte_eth_dev *edev;
  13         ptrdiff_t idx;
  14
  15         /* Avoid Undefined Behaviour */
  16         if (start != NULL &&
  17             (start < &rte_eth_devices[0] ||
  18              start > &rte_eth_devices[RTE_MAX_ETHPORTS]))
  19                 return NULL;
  20         if (start != NULL)
  21                 idx = start - &rte_eth_devices[0] + 1;
  22         else
  23                 idx = 0;
  24         for (; idx < RTE_MAX_ETHPORTS; idx++) {
  25                 edev = &rte_eth_devices[idx];
  26                 if (cmp(edev, data) == 0)
  27                         return edev;
  28         }
  29         return NULL;
  30 }
  31