bnx2x: Prevent UDP 4-tuple configurations on older adapters

Configuring 4-tuple RSS hsahing for UDP
[E.g., by using `ethtool -N <interface> rx-flow-hash udp4 sdfn']
on a 57710/57711 adapter would cause it to assert as HW does not
support such a configuration.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: Ariel Elior <Ariel.Elior@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c
index aeb7ce6..be628bd 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c
@@ -3351,6 +3351,13 @@ static int bnx2x_set_rss_flags(struct bnx2x *bp, struct ethtool_rxnfc *info)
                        udp_rss_requested = 0;
                else
                        return -EINVAL;
+
+               if (CHIP_IS_E1x(bp) && udp_rss_requested) {
+                       DP(BNX2X_MSG_ETHTOOL,
+                          "57710, 57711 boards don't support RSS according to UDP 4-tuple\n");
+                       return -EINVAL;
+               }
+
                if ((info->flow_type == UDP_V4_FLOW) &&
                    (bp->rss_conf_obj.udp_rss_v4 != udp_rss_requested)) {
                        bp->rss_conf_obj.udp_rss_v4 = udp_rss_requested;