From: Roland Stigge <sti...@antcom.de>
When a link is already up, the following sequence makes the kernel
block completely:
ip link set dev eth0 down
ip link set dev eth0 up
This is because on suspended phy, the following lines
__lpc_eth_reset(pldat);
__lpc_eth_init(pldat);
make the LPC ethernet core block (see LPC32x0 manual). The PHY needs to be
(re-)activated low-level first.
Signed-off-by: Roland Stigge <sti...@antcom.de>
---
Applies to v3.17-rc3
drivers/net/ethernet/nxp/lpc_eth.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/ethernet/nxp/lpc_eth.c
b/drivers/net/ethernet/nxp/lpc_eth.c
index 8706c0d..a44a03c 100644
--- a/drivers/net/ethernet/nxp/lpc_eth.c
+++ b/drivers/net/ethernet/nxp/lpc_eth.c
@@ -1220,6 +1220,9 @@ static int lpc_eth_open(struct net_device *ndev)
__lpc_eth_clock_enable(pldat, true);
+ /* Suspended PHY makes LPC ethernet core block, so resume now */
+ phy_resume(pldat->phy_dev);
+
/* Reset and initialize */
__lpc_eth_reset(pldat);
__lpc_eth_init(pldat);
--
2.1.0
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