From e703ea55e717ab779bd23abbae3ce8b68dc12b9a Mon Sep 17 00:00:00 2001 From: Jose Abreu Date: Fri, 24 May 2019 10:20:25 +0200 Subject: [PATCH] net: stmmac: dwmac4/5: Clear unused address entries [ Upstream commit 0620ec6c62a5a07625b65f699adc5d1b90394ee6 ] In case we don't use a given address entry we need to clear it because it could contain previous values that are no longer valid. Found out while running stmmac selftests. Signed-off-by: Jose Abreu Cc: Joao Pinto Cc: David S. Miller Cc: Giuseppe Cavallaro Cc: Alexandre Torgue Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c index 55ae14a6bb8c..ed5fcd4994f2 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c @@ -443,14 +443,20 @@ static void dwmac4_set_filter(struct mac_device_info *hw, * are required */ value |= GMAC_PACKET_FILTER_PR; - } else if (!netdev_uc_empty(dev)) { - int reg = 1; + } else { struct netdev_hw_addr *ha; + int reg = 1; netdev_for_each_uc_addr(ha, dev) { dwmac4_set_umac_addr(hw, ha->addr, reg); reg++; } + + while (reg <= GMAC_MAX_PERFECT_ADDRESSES) { + writel(0, ioaddr + GMAC_ADDR_HIGH(reg)); + writel(0, ioaddr + GMAC_ADDR_LOW(reg)); + reg++; + } } writel(value, ioaddr + GMAC_PACKET_FILTER); -- 2.20.1