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Diffstat (limited to 'net/mac802154/iface.c')
-rw-r--r--net/mac802154/iface.c17
1 files changed, 14 insertions, 3 deletions
diff --git a/net/mac802154/iface.c b/net/mac802154/iface.c
index 8afe26d72971..b5a0936ce514 100644
--- a/net/mac802154/iface.c
+++ b/net/mac802154/iface.c
@@ -537,8 +537,18 @@ static void ieee802154_if_setup(struct net_device *dev)
dev->addr_len = IEEE802154_EXTENDED_ADDR_LEN;
memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN);
- dev->hard_header_len = MAC802154_FRAME_HARD_HEADER_LEN;
- dev->needed_tailroom = 2 + 16; /* FCS + MIC */
+ /* Let hard_header_len set to IEEE802154_MIN_HEADER_LEN. AF_PACKET
+ * will not send frames without any payload, but ack frames
+ * has no payload, so substract one that we can send a 3 bytes
+ * frame. The xmit callback assumes at least a hard header where two
+ * bytes fc and sequence field are set.
+ */
+ dev->hard_header_len = IEEE802154_MIN_HEADER_LEN - 1;
+ /* The auth_tag header is for security and places in private payload
+ * room of mac frame which stucks between payload and FCS field.
+ */
+ dev->needed_tailroom = IEEE802154_MAX_AUTH_TAG_LEN +
+ IEEE802154_FCS_LEN;
dev->mtu = IEEE802154_MTU;
dev->tx_queue_len = 300;
dev->flags = IFF_NOARP | IFF_BROADCAST;
@@ -617,7 +627,8 @@ ieee802154_if_add(struct ieee802154_local *local, const char *name,
if (!ndev)
return ERR_PTR(-ENOMEM);
- ndev->needed_headroom = local->hw.extra_tx_headroom;
+ ndev->needed_headroom = local->hw.extra_tx_headroom +
+ IEEE802154_MAX_HEADER_LEN;
ret = dev_alloc_name(ndev, ndev->name);
if (ret < 0)