netdev: bunch of drivers: avoid WARN at net/core/dev.c:1328

The drivers were touching net queue before it has been started, so
without this patch, the drivers will potentially WARN at
net/core/dev.c:1328.

I don't have the hardware for the drivers below, so this patch is
untested, and thus should be carefully peer reviewed.

tc35815.c
au1000_eth.c
bfin_mac.c
macb.c
^ The four drivers are using phylib, they're calling netif_start_queue()
in open() callback. So trivially remove netif_tx_schedule_all().
Phylib will handle netif_carrier_*().

cpmac.c
fec_mpc52xx.c
fs_enet/fs_enet-main.c
sh_eth.c
^ The same as above, but these were also needlessly calling
netif_carrier_*() functions. So removed queue calls and also remove
carrier calls, since phylib will handle it. fs_enet-main.c also didn't
call netif_start_queue() at open(), this is fixed now.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 files changed, 5 insertions, 25 deletions

diff --git a/drivers/net/au1000_eth.c b/drivers/net/au1000_eth.c
index 3ab61e40e86a..cb8be490e5ae 100644
--- a/drivers/net/au1000_eth.c
+++ b/drivers/net/au1000_eth.c
@@ -911,9 +911,8 @@ au1000_adjust_link(struct net_device *dev)
         if(phydev->link != aup->old_link) {
                 // link state changed
 
-                if (phydev->link) // link went up
-                        netif_tx_schedule_all(dev);
-                else { // link went down
+                if (!phydev->link) {
+                        /* link went down */
                         aup->old_speed = 0;
                         aup->old_duplex = -1;
                 }
diff --git a/drivers/net/bfin_mac.c b/drivers/net/bfin_mac.c
index a6a3da89f590..a8ec60e1ed75 100644
--- a/drivers/net/bfin_mac.c
+++ b/drivers/net/bfin_mac.c
@@ -357,7 +357,6 @@ static void bfin_mac_adjust_link(struct net_device *dev)
                 if (!lp->old_link) {
                         new_state = 1;
                         lp->old_link = 1;
-                        netif_tx_schedule_all(dev);
                 }
         } else if (lp->old_link) {
                 new_state = 1;
diff --git a/drivers/net/cpmac.c b/drivers/net/cpmac.c
index fbd4280c102c..a7800e559090 100644
--- a/drivers/net/cpmac.c
+++ b/drivers/net/cpmac.c
@@ -945,10 +945,8 @@ static void cpmac_adjust_link(struct net_device *dev)
                 if (!priv->oldlink) {
                         new_state = 1;
                         priv->oldlink = 1;
-                        netif_tx_schedule_all(dev);
                 }
         } else if (priv->oldlink) {
-                netif_tx_stop_all_queues(dev);
                 new_state = 1;
                 priv->oldlink = 0;
                 priv->oldspeed = 0;
diff --git a/drivers/net/fec_mpc52xx.c b/drivers/net/fec_mpc52xx.c
index ae9ecb7df22b..4e4f68304e82 100644
--- a/drivers/net/fec_mpc52xx.c
+++ b/drivers/net/fec_mpc52xx.c
@@ -197,9 +197,6 @@ static void mpc52xx_fec_adjust_link(struct net_device *dev)
                 if (priv->link == PHY_DOWN) {
                         new_state = 1;
                         priv->link = phydev->link;
-                        netif_tx_schedule_all(dev);
-                        netif_carrier_on(dev);
-                        netif_start_queue(dev);
                 }
 
         } else if (priv->link) {
@@ -207,8 +204,6 @@ static void mpc52xx_fec_adjust_link(struct net_device *dev)
                 priv->link = PHY_DOWN;
                 priv->speed = 0;
                 priv->duplex = -1;
-                netif_stop_queue(dev);
-                netif_carrier_off(dev);
         }
 
         if (new_state && netif_msg_link(priv))
diff --git a/drivers/net/fs_enet/fs_enet-main.c b/drivers/net/fs_enet/fs_enet-main.c
index 445763e5648e..52911889fd12 100644
--- a/drivers/net/fs_enet/fs_enet-main.c
+++ b/drivers/net/fs_enet/fs_enet-main.c
@@ -738,9 +738,6 @@ static void generic_adjust_link(struct  net_device *dev)
                 if (!fep->oldlink) {
                         new_state = 1;
                         fep->oldlink = 1;
-                        netif_tx_schedule_all(dev);
-                        netif_carrier_on(dev);
-                        netif_start_queue(dev);
                 }
 
                 if (new_state)
@@ -750,8 +747,6 @@ static void generic_adjust_link(struct  net_device *dev)
                 fep->oldlink = 0;
                 fep->oldspeed = 0;
                 fep->oldduplex = -1;
-                netif_carrier_off(dev);
-                netif_stop_queue(dev);
         }
 
         if (new_state && netif_msg_link(fep))
@@ -826,6 +821,8 @@ static int fs_enet_open(struct net_device *dev)
         }
         phy_start(fep->phydev);
 
+        netif_start_queue(dev);
+
         return 0;
 }
 
diff --git a/drivers/net/macb.c b/drivers/net/macb.c
index 0496d16f9de5..daba82bbcb56 100644
--- a/drivers/net/macb.c
+++ b/drivers/net/macb.c
@@ -164,9 +164,7 @@ static void macb_handle_link_change(struct net_device *dev)
         }
 
         if (phydev->link != bp->link) {
-                if (phydev->link)
-                        netif_tx_schedule_all(dev);
-                else {
+                if (!phydev->link) {
                         bp->speed = 0;
                         bp->duplex = -1;
                 }
diff --git a/drivers/net/sh_eth.c b/drivers/net/sh_eth.c
index a4bc812aa999..c69ba1395fa9 100644
--- a/drivers/net/sh_eth.c
+++ b/drivers/net/sh_eth.c
@@ -642,17 +642,12 @@ static void sh_eth_adjust_link(struct net_device *ndev)
                                         | ECMR_DM, ioaddr + ECMR);
                         new_state = 1;
                         mdp->link = phydev->link;
-                        netif_tx_schedule_all(ndev);
-                        netif_carrier_on(ndev);
-                        netif_start_queue(ndev);
                 }
         } else if (mdp->link) {
                 new_state = 1;
                 mdp->link = PHY_DOWN;
                 mdp->speed = 0;
                 mdp->duplex = -1;
-                netif_stop_queue(ndev);
-                netif_carrier_off(ndev);
         }
 
         if (new_state)
diff --git a/drivers/net/tc35815.c b/drivers/net/tc35815.c
index 41d3ac45685f..a645e5028c14 100644
--- a/drivers/net/tc35815.c
+++ b/drivers/net/tc35815.c
@@ -672,7 +672,6 @@ static void tc_handle_link_change(struct net_device *dev)
                         if (dev->flags & IFF_PROMISC)
                                 tc35815_set_multicast_list(dev);
 #endif
-                        netif_tx_schedule_all(dev);
                 } else {
                         lp->speed = 0;
                         lp->duplex = -1;