From: Trevor Woerner twoerner@gmail.com
commit ace19b992436a257d9a793672e57abc28fe83e2e upstream.
A hard hang is observed whenever the ethernet interface is brought down. If the PHY is stopped before the LPC core block is reset, the SoC will hang. Comparing lpc_eth_close() and lpc_eth_open() I re-arranged the ordering of the functions calls in lpc_eth_close() to reset the hardware before stopping the PHY. Fixes: b7370112f519 ("lpc32xx: Added ethernet driver") Signed-off-by: Trevor Woerner twoerner@gmail.com Acked-by: Vladimir Zapolskiy vz@mleia.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/nxp/lpc_eth.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
--- a/drivers/net/ethernet/nxp/lpc_eth.c +++ b/drivers/net/ethernet/nxp/lpc_eth.c @@ -1007,9 +1007,6 @@ static int lpc_eth_close(struct net_devi napi_disable(&pldat->napi); netif_stop_queue(ndev);
- if (ndev->phydev) - phy_stop(ndev->phydev); - spin_lock_irqsave(&pldat->lock, flags); __lpc_eth_reset(pldat); netif_carrier_off(ndev); @@ -1017,6 +1014,8 @@ static int lpc_eth_close(struct net_devi writel(0, LPC_ENET_MAC2(pldat->net_base)); spin_unlock_irqrestore(&pldat->lock, flags);
+ if (ndev->phydev) + phy_stop(ndev->phydev); clk_disable_unprepare(pldat->clk);
return 0;