eal/linux: fix socket value for undetermined numa node

The patch sets zero as the default value of pci device numa_node
if the socket could not be determined.
It provides the same default value as FreeBSD which has no NUMA support,
and makes the return value of rte_eth_dev_socket_id() be consistent
with the API description.

Signed-off-by: Cunming Liang <cunming.liang@intel.com>

diff --git a/lib/librte_eal/linuxapp/eal/eal_pci.c b/lib/librte_eal/linuxapp/eal/eal_pci.c
index 01e2855..bc5b5be 100644 (file)
--- a/lib/librte_eal/linuxapp/eal/eal_pci.c
+++ b/lib/librte_eal/linuxapp/eal/eal_pci.c
@@ -325,8 +325,8 @@ pci_scan_one(const char *dirname, uint16_t domain, uint8_t bus,
        snprintf(filename, sizeof(filename), "%s/numa_node",
                 dirname);
        if (access(filename, R_OK) != 0) {
-               /* if no NUMA support just set node to -1 */
-               dev->numa_node = -1;
+               /* if no NUMA support, set default to 0 */
+               dev->numa_node = 0;
        } else {
                if (eal_parse_sysfs_value(filename, &tmp) < 0) {
                        free(dev);