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| H A D | tun.c | diff 950271d7cc0b4546af3549d8143c4132d6e1f138 Thu Dec 24 20:52:16 CST 2020 Yunjian Wang <wangyunjian@huawei.com> tun: fix return value when the number of iovs exceeds MAX_SKB_FRAGS
Currently the tun_napi_alloc_frags() function returns -ENOMEM when the
number of iovs exceeds MAX_SKB_FRAGS + 1. However this is inappropriate,
we should use -EMSGSIZE instead of -ENOMEM.
The following distinctions are matters:
1. the caller need to drop the bad packet when -EMSGSIZE is returned,
which means meeting a persistent failure.
2. the caller can try again when -ENOMEM is returned, which means
meeting a transient failure.
Fixes: 90e33d459407 ("tun: enable napi_gro_frags() for TUN/TAP driver")
Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Link: https://lore.kernel.org/r/1608864736-24332-1-git-send-email-wangyunjian@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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