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net: lpc_eth: Fix crash on ip link up

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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 <stigge@antcom.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Roland Stigge 2014-09-01 13:46:46 +02:00 committed by David S. Miller
parent 0486a063b1
commit aff88a0695
1 changed files with 3 additions and 0 deletions
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3
drivers/net/ethernet/nxp/lpc_eth.c
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@ -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);