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netif: Don't return error if pass NULL netif_input_fn to netif_add

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The new NULL checking against netif_input_fn make ppp stop working
because in ppp_new() it calls netif_add with NULL netif_input_fn.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
This commit is contained in:
Axel Lin 2018-06-13 14:24:37 +08:00 committed by Simon Goldschmidt
parent 3f2227f04c
commit 61e3f49f69
1 changed files with 0 additions and 1 deletions
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src/core/netif.c
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@ -294,7 +294,6 @@ netif_add(struct netif *netif,
LWIP_ERROR("netif_add: invalid netif", netif != NULL, return NULL);
LWIP_ERROR("netif_add: No init function given", init != NULL, return NULL);
LWIP_ERROR("netif_add: No input function given", input != NULL, return NULL);
#if LWIP_IPV4
if (ipaddr == NULL) {