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authorLucas Stach <l.stach@pengutronix.de>2013-03-14 05:12:01 +0000
committerDavid S. Miller <davem@davemloft.net>2013-03-15 08:46:48 -0400
commitd97e74976982a35168c7f131cce0d93537337a26 (patch)
treeda808857fddb6f987c1982b2348555afd247b80e
parentcca7af3889bfa343d33d5e657a38d876abd10e58 (diff)
downloadop-kernel-dev-d97e74976982a35168c7f131cce0d93537337a26.zip
op-kernel-dev-d97e74976982a35168c7f131cce0d93537337a26.tar.gz
net: fec: restart the FEC when PHY speed changes
Proviously we would only restart the FEC when PHY link or duplex state changed. PHY does not always bring down the link for speed changes, in which case we would not detect any change and keep FEC running. Switching link speed without restarting the FEC results in the FEC being stuck in an indefinite state, generating error conditions for every packet. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/ethernet/freescale/fec.c26
-rw-r--r--drivers/net/ethernet/freescale/fec.h1
2 files changed, 16 insertions, 11 deletions
diff --git a/drivers/net/ethernet/freescale/fec.c b/drivers/net/ethernet/freescale/fec.c
index 069a155..61d2e62 100644
--- a/drivers/net/ethernet/freescale/fec.c
+++ b/drivers/net/ethernet/freescale/fec.c
@@ -934,24 +934,28 @@ static void fec_enet_adjust_link(struct net_device *ndev)
goto spin_unlock;
}
- /* Duplex link change */
if (phy_dev->link) {
- if (fep->full_duplex != phy_dev->duplex) {
- fec_restart(ndev, phy_dev->duplex);
- /* prevent unnecessary second fec_restart() below */
+ if (!fep->link) {
fep->link = phy_dev->link;
status_change = 1;
}
- }
- /* Link on or off change */
- if (phy_dev->link != fep->link) {
- fep->link = phy_dev->link;
- if (phy_dev->link)
+ if (fep->full_duplex != phy_dev->duplex)
+ status_change = 1;
+
+ if (phy_dev->speed != fep->speed) {
+ fep->speed = phy_dev->speed;
+ status_change = 1;
+ }
+
+ /* if any of the above changed restart the FEC */
+ if (status_change)
fec_restart(ndev, phy_dev->duplex);
- else
+ } else {
+ if (fep->link) {
fec_stop(ndev);
- status_change = 1;
+ status_change = 1;
+ }
}
spin_unlock:
diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h
index f539007..eb43729 100644
--- a/drivers/net/ethernet/freescale/fec.h
+++ b/drivers/net/ethernet/freescale/fec.h
@@ -240,6 +240,7 @@ struct fec_enet_private {
phy_interface_t phy_interface;
int link;
int full_duplex;
+ int speed;
struct completion mdio_done;
int irq[FEC_IRQ_NUM];
int bufdesc_ex;
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