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netif_open: Fail with ENXIO instead of panic if no netif available 

Avoid undesirable freeze for efiboot/x86 when interfaces are really
unavailable, or fail to be configured by buggy UEFI firmware.
This commit is contained in:
rin 2023-09-14 03:08:31 +00:00
parent 3029494a69
commit 701cc34a36
1 changed files with 5 additions and 3 deletions
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8
sys/lib/libsa/netif.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: netif.c,v 1.26 2019/03/31 20:08:45 christos Exp $ */
/* $NetBSD: netif.c,v 1.27 2023/09/14 03:08:31 rin Exp $ */
/*
* Copyright (c) 1993 Adam Glass
@ -292,8 +292,10 @@ fnd:
(void)memset(s, 0, sizeof(*s));
netif_init();
nif = netif_select(machdep_hint);
if (!nif)
panic("netboot: no interfaces left untried");
if (!nif) {
errno = ENXIO;
return -1;
}
if (netif_probe(nif, machdep_hint)) {
printf("%s: couldn't probe %s%d\n", __func__,
nif->nif_driver->netif_bname, nif->nif_unit);