From 418e7dab0f83fcef4f3cb1ae5b1c02ee83b8e26c Mon Sep 17 00:00:00 2001 From: Paul Burton Date: Fri, 22 Jun 2018 20:17:53 -0700 Subject: [PATCH] net: pch_gbe: Clean up pch_gbe_set_multi Refactor pch_gbe_set_multi in order to avoid unnecessary indentation & make it clearer what the code is doing. The one behavioral change from this patch is that we'll no longer configure the MAC address registers for multicast addresses when the IFF_PROMISC or IFF_ALLMULTI flags are set. In these cases, just as when we want to monitor more multicast addresses than we have MAC address registers, we disable multicast filtering so the MAC address registers are unused. Signed-off-by: Paul Burton Signed-off-by: David S. Miller --- .../ethernet/oki-semi/pch_gbe/pch_gbe_main.c | 33 +++++++++---------- 1 file changed, 16 insertions(+), 17 deletions(-) diff --git a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c index dc8c4050fad3..43c0c10dfeb7 100644 --- a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c +++ b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c @@ -2110,28 +2110,27 @@ static void pch_gbe_set_multi(struct net_device *netdev) netdev_dbg(netdev, "netdev->flags : 0x%08x\n", netdev->flags); - /* Check for Promiscuous and All Multicast modes */ + /* By default enable address & multicast filtering */ rctl = ioread32(&hw->reg->RX_MODE); + rctl |= PCH_GBE_ADD_FIL_EN | PCH_GBE_MLT_FIL_EN; + + /* Promiscuous mode disables all hardware address filtering */ + if (netdev->flags & IFF_PROMISC) + rctl &= ~(PCH_GBE_ADD_FIL_EN | PCH_GBE_MLT_FIL_EN); + + /* If we want to monitor more multicast addresses than the hardware can + * support then disable hardware multicast filtering. + */ mc_count = netdev_mc_count(netdev); - if ((netdev->flags & IFF_PROMISC)) { - rctl &= ~PCH_GBE_ADD_FIL_EN; + if ((netdev->flags & IFF_ALLMULTI) || mc_count >= PCH_GBE_MAR_ENTRIES) rctl &= ~PCH_GBE_MLT_FIL_EN; - } else if ((netdev->flags & IFF_ALLMULTI)) { - /* all the multicasting receive permissions */ - rctl |= PCH_GBE_ADD_FIL_EN; - rctl &= ~PCH_GBE_MLT_FIL_EN; - } else { - if (mc_count >= PCH_GBE_MAR_ENTRIES) { - /* all the multicasting receive permissions */ - rctl |= PCH_GBE_ADD_FIL_EN; - rctl &= ~PCH_GBE_MLT_FIL_EN; - } else { - rctl |= (PCH_GBE_ADD_FIL_EN | PCH_GBE_MLT_FIL_EN); - } - } + iowrite32(rctl, &hw->reg->RX_MODE); - if (mc_count >= PCH_GBE_MAR_ENTRIES) + /* If we're not using multicast filtering then there's no point + * configuring the unused MAC address registers. + */ + if (!(rctl & PCH_GBE_MLT_FIL_EN)) return; /* Load the first set of multicast addresses into MAC address registers -- 2.30.2