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net: bcmgenet: Poll internal PHY for GENETv5

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[ Upstream commit 64bd9c8135 ]

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: 421380856d ("net: bcmgenet: add support for the GENETv5 hardware")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Florian Fainelli
2018-10-11 15:06:33 -07:00
committed by Greg Kroah-Hartman
parent 71944eb542
commit c8c2df18ee
1 changed files with 6 additions and 3 deletions
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9
drivers/net/ethernet/broadcom/genet/bcmmii.c
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@@ -339,9 +339,12 @@ 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
*/
if (priv->internal_phy)
* 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 && !GENET_IS_V5(priv))
priv->phydev->irq = PHY_IGNORE_INTERRUPT;
return 0;