net/fec: restore interrupt mask after software-reset in fec_stop()

After the change from mdio polling to irq, it became necessary to
restore the interrupt mask after resetting the chip in fec_stop().
Otherwise, with all irqs disabled, no communication with the PHY will be
possible after e.g. un-/replugging the cable and the device gets
stalled.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/net/fec.c b/drivers/net/fec.c
index 391a553a3add..768b840aeb6b 100644
--- a/drivers/net/fec.c
+++ b/drivers/net/fec.c
@@ -118,6 +118,8 @@ static unsigned char	fec_mac_default[] = {
 #define FEC_ENET_MII    ((uint)0x00800000)      /* MII interrupt */
 #define FEC_ENET_EBERR  ((uint)0x00400000)      /* SDMA bus error */
 
+#define FEC_DEFAULT_IMASK (FEC_ENET_TXF | FEC_ENET_RXF | FEC_ENET_MII)
+
 /* The FEC stores dest/src/type, data, and checksum for receive packets.
  */
 #define PKT_MAXBUF_SIZE         1518
@@ -1213,8 +1215,7 @@ fec_restart(struct net_device *dev, int duplex)
         writel(0, fep->hwp + FEC_R_DES_ACTIVE);
 
         /* Enable interrupts we wish to service */
-        writel(FEC_ENET_TXF | FEC_ENET_RXF | FEC_ENET_MII,
-                        fep->hwp + FEC_IMASK);
+        writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK);
 }
 
 static void
@@ -1233,8 +1234,8 @@ fec_stop(struct net_device *dev)
         /* Whack a reset.  We should wait for this. */
         writel(1, fep->hwp + FEC_ECNTRL);
         udelay(10);
-
         writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
+        writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK);
 }
 
 static int __devinit