From: Wright Feng Date: Fri, 3 Jun 2016 23:31:09 +0200 Subject: [PATCH] brcmfmac: use ndev->needed_headroom to reserve additional header space When using nmap tool with FMAC, the nmap packets were be dropped by kernel because the size was too short. The kernel message showed like "nmap: packet size is too short (42 <= 50)". It is caused by the packet length is shorter than ndev->hard_header_len. According to definition of LL_RESERVED_SPACE() and hard_header_len, we should use hard_header_len to reserve for L2 header, like ethernet header(ETH_HLEN) in our case and use needed_headroom for the additional headroom needed by hardware. Reviewed-by: Arend Van Spriel Signed-off-by: Wright Feng Signed-off-by: Arend van Spriel Signed-off-by: Kalle Valo --- --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c @@ -516,7 +516,7 @@ int brcmf_net_attach(struct brcmf_if *if /* set appropriate operations */ ndev->netdev_ops = &brcmf_netdev_ops_pri; - ndev->hard_header_len += drvr->hdrlen; + ndev->needed_headroom += drvr->hdrlen; ndev->ethtool_ops = &brcmf_ethtool_ops; drvr->rxsz = ndev->mtu + ndev->hard_header_len +