Return-Path: From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Florian Fainelli , "David S . Miller" , Sasha Levin Subject: [PATCH AUTOSEL 4.18 16/33] net: bcmgenet: Poll internal PHY for GENETv5 Date: Tue, 30 Oct 2018 09:26:40 -0400 Message-Id: <20181030132657.217970-16-sashal@kernel.org> In-Reply-To: <20181030132657.217970-1-sashal@kernel.org> References: <20181030132657.217970-1-sashal@kernel.org> List-ID: From: Florian Fainelli [ Upstream commit 64bd9c8135751b561f27edaaffe93d07093f81af ] On GENETv5, there is a hardware issue which prevents the GENET hardware from generating a link UP interrupt when the link is operating at 10Mbits/sec. Since we do not have any way to configure the link detection logic, fallback to polling in that case. Fixes: 421380856d9c ("net: bcmgenet: add support for the GENETv5 hardware") Signed-off-by: Florian Fainelli Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/broadcom/genet/bcmmii.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/broadcom/genet/bcmmii.c b/drivers/net/ethernet/broadcom/genet/bcmmii.c index 4241ae928d4a..34af5f1569c8 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmmii.c +++ b/drivers/net/ethernet/broadcom/genet/bcmmii.c @@ -321,9 +321,12 @@ int bcmgenet_mii_probe(struct net_device *dev) phydev->advertising = phydev->supported; /* The internal PHY has its link interrupts routed to the - * Ethernet MAC ISRs + * Ethernet MAC ISRs. On GENETv5 there is a hardware issue + * that prevents the signaling of link UP interrupts when + * the link operates at 10Mbps, so fallback to polling for + * those versions of GENET. */ - if (priv->internal_phy) + if (priv->internal_phy && !GENET_IS_V5(priv)) dev->phydev->irq = PHY_IGNORE_INTERRUPT; return 0; -- 2.17.1