From: wrightf <[email protected]> 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 <[email protected]> Signed-off-by: Wright Feng <[email protected]> Signed-off-by: Arend van Spriel <[email protected]> --- drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c index b590499..6570dba 100644 --- 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 *ifp, bool rtnl_locked) /* 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 + -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
