mv643xx_eth: Check ETH_INT_CAUSE_STATE bit

Commit 468d09f8946d40228c56de26fe4874b2f98067ed masked the "state"
interrupt (bit 20 of the cause register). This results in Radstone's
PPC7D repeatedly re-entering the interrupt routine, locking up the
board. The following patch returns the required handling for this
interrupt.

Signed-off-by: Martyn Welch <martyn.welch@radstone.co.uk>
Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

2 files changed, 4 insertions, 2 deletions

diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index 456d1e1c98bd..34288fe038c3 100644
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -534,7 +534,7 @@ static irqreturn_t mv643xx_eth_int_handler(int irq, void *dev_id)
         }
 
         /* PHY status changed */
-        if (eth_int_cause_ext & ETH_INT_CAUSE_PHY) {
+        if (eth_int_cause_ext & (ETH_INT_CAUSE_PHY | ETH_INT_CAUSE_STATE)) {
                 struct ethtool_cmd cmd;
 
                 if (mii_link_ok(&mp->mii)) {
diff --git a/drivers/net/mv643xx_eth.h b/drivers/net/mv643xx_eth.h
index 82f8c0cbfb64..565b96696aca 100644
--- a/drivers/net/mv643xx_eth.h
+++ b/drivers/net/mv643xx_eth.h
@@ -64,7 +64,9 @@
 #define ETH_INT_CAUSE_TX_ERROR  (ETH_TX_QUEUES_ENABLED << 8)
 #define ETH_INT_CAUSE_TX        (ETH_INT_CAUSE_TX_DONE | ETH_INT_CAUSE_TX_ERROR)
 #define ETH_INT_CAUSE_PHY       0x00010000
-#define ETH_INT_UNMASK_ALL_EXT  (ETH_INT_CAUSE_TX | ETH_INT_CAUSE_PHY)
+#define ETH_INT_CAUSE_STATE     0x00100000
+#define ETH_INT_UNMASK_ALL_EXT  (ETH_INT_CAUSE_TX | ETH_INT_CAUSE_PHY | \
+                                        ETH_INT_CAUSE_STATE)
 
 #define ETH_INT_MASK_ALL        0x00000000
 #define ETH_INT_MASK_ALL_EXT    0x00000000