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Date: Mon, 20 Apr 2020 14:38:32 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Jose Abreu <Jose.Abreu@...opsys.com>, "David S. Miller" <davem@...emloft.net> Subject: [PATCH 5.5 28/65] net: stmmac: xgmac: Fix VLAN register handling From: Jose Abreu <Jose.Abreu@...opsys.com> commit 21f64e72e7073199a6f8d7d8efe52cd814d7d665 upstream. Commit 907a076881f1, forgot that we need to clear old values of XGMAC_VLAN_TAG register when we switch from VLAN perfect matching to HASH matching. Fix it. Fixes: 907a076881f1 ("net: stmmac: xgmac: fix incorrect XGMAC_VLAN_TAG register writting") Signed-off-by: Jose Abreu <Jose.Abreu@...opsys.com> Signed-off-by: David S. Miller <davem@...emloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c | 11 +++++++++++ 1 file changed, 11 insertions(+) --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c @@ -576,8 +576,13 @@ static void dwxgmac2_update_vlan_hash(st value |= XGMAC_VLAN_EDVLP; value |= XGMAC_VLAN_ESVL; value |= XGMAC_VLAN_DOVLTC; + } else { + value &= ~XGMAC_VLAN_EDVLP; + value &= ~XGMAC_VLAN_ESVL; + value &= ~XGMAC_VLAN_DOVLTC; } + value &= ~XGMAC_VLAN_VID; writel(value, ioaddr + XGMAC_VLAN_TAG); } else if (perfect_match) { u32 value = readl(ioaddr + XGMAC_PACKET_FILTER); @@ -588,13 +593,19 @@ static void dwxgmac2_update_vlan_hash(st value = readl(ioaddr + XGMAC_VLAN_TAG); + value &= ~XGMAC_VLAN_VTHM; value |= XGMAC_VLAN_ETV; if (is_double) { value |= XGMAC_VLAN_EDVLP; value |= XGMAC_VLAN_ESVL; value |= XGMAC_VLAN_DOVLTC; + } else { + value &= ~XGMAC_VLAN_EDVLP; + value &= ~XGMAC_VLAN_ESVL; + value &= ~XGMAC_VLAN_DOVLTC; } + value &= ~XGMAC_VLAN_VID; writel(value | perfect_match, ioaddr + XGMAC_VLAN_TAG); } else { u32 value = readl(ioaddr + XGMAC_PACKET_FILTER);
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