From 08c9c126004e999f0c05b369d1e0cc757e6040cc Mon Sep 17 00:00:00 2001 From: Gavin Shan Date: Thu, 22 Sep 2016 08:35:01 +0930 Subject: [PATCH] net/faraday: Clear stale interrupts There is stale interrupt (PHYSTS_CHG in ISR, bit#6 in 0x0) from the bootloader (uboot) when enabling the MAC. The stale interrupts aren't part of kernel and should be cleared. This clears the stale interrupts in ISR (0x0) when enabling the MAC. Signed-off-by: Gavin Shan Signed-off-by: Joel Stanley Signed-off-by: David S. Miller --- drivers/net/ethernet/faraday/ftgmac100.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c index 47f512224b57..189373743ddf 100644 --- a/drivers/net/ethernet/faraday/ftgmac100.c +++ b/drivers/net/ethernet/faraday/ftgmac100.c @@ -1112,6 +1112,7 @@ static int ftgmac100_poll(struct napi_struct *napi, int budget) static int ftgmac100_open(struct net_device *netdev) { struct ftgmac100 *priv = netdev_priv(netdev); + unsigned int status; int err; err = ftgmac100_alloc_buffers(priv); @@ -1137,6 +1138,11 @@ static int ftgmac100_open(struct net_device *netdev) ftgmac100_init_hw(priv); ftgmac100_start_hw(priv, priv->use_ncsi ? 100 : 10); + + /* Clear stale interrupts */ + status = ioread32(priv->base + FTGMAC100_OFFSET_ISR); + iowrite32(status, priv->base + FTGMAC100_OFFSET_ISR); + if (netdev->phydev) phy_start(netdev->phydev); else if (priv->use_ncsi) -- 2.20.1