drivers: net: use NETDEV_TX_OK instead of NETDEV_TX_LOCKED

These drivers already call netif_stop_queue() so we should not be called
unless tx space is available.  Just free the skb and return TX_OK.

Followup patch will remove NETDEV_TX_LOCKED from the kernel.

Cc: linux-parisc@vger.kernel.org
Cc: linux-hams@vger.kernel.org
Cc: Thomas Sailer <t.sailer@alumni.ethz.ch>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 21 insertions, 13 deletions

diff --git a/drivers/net/ethernet/amd/7990.c b/drivers/net/ethernet/amd/7990.c
index 66d0b73c39c0..8e7575571531 100644
--- a/drivers/net/ethernet/amd/7990.c
+++ b/drivers/net/ethernet/amd/7990.c
@@ -543,11 +543,13 @@ int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
         static int outs;
         unsigned long flags;
 
-        if (!TX_BUFFS_AVAIL)
-                return NETDEV_TX_LOCKED;
-
         netif_stop_queue(dev);
 
+        if (!TX_BUFFS_AVAIL) {
+                dev_consume_skb_any(skb);
+                return NETDEV_TX_OK;
+        }
+
         skblen = skb->len;
 
 #ifdef DEBUG_DRIVER
diff --git a/drivers/net/ethernet/amd/a2065.c b/drivers/net/ethernet/amd/a2065.c
index 56139184b801..2a18d34d2610 100644
--- a/drivers/net/ethernet/amd/a2065.c
+++ b/drivers/net/ethernet/amd/a2065.c
@@ -547,10 +547,8 @@ static netdev_tx_t lance_start_xmit(struct sk_buff *skb,
 
         local_irq_save(flags);
 
-        if (!lance_tx_buffs_avail(lp)) {
-                local_irq_restore(flags);
-                return NETDEV_TX_LOCKED;
-        }
+        if (!lance_tx_buffs_avail(lp))
+                goto out_free;
 
 #ifdef DEBUG
         /* dump the packet */
@@ -573,6 +571,7 @@ static netdev_tx_t lance_start_xmit(struct sk_buff *skb,
 
         /* Kick the lance: transmit now */
         ll->rdp = LE_C0_INEA | LE_C0_TDMD;
+ out_free:
         dev_kfree_skb(skb);
 
         local_irq_restore(flags);
diff --git a/drivers/net/ethernet/dec/tulip/de4x5.c b/drivers/net/ethernet/dec/tulip/de4x5.c
index 3acde3b9b767..d88fbab378aa 100644
--- a/drivers/net/ethernet/dec/tulip/de4x5.c
+++ b/drivers/net/ethernet/dec/tulip/de4x5.c
@@ -1465,7 +1465,7 @@ de4x5_queue_pkt(struct sk_buff *skb, struct net_device *dev)
 
     netif_stop_queue(dev);
     if (!lp->tx_enable)                   /* Cannot send for now */
-        return NETDEV_TX_LOCKED;
+                goto tx_err;
 
     /*
     ** Clean out the TX ring asynchronously to interrupts - sometimes the
@@ -1478,7 +1478,7 @@ de4x5_queue_pkt(struct sk_buff *skb, struct net_device *dev)
 
     /* Test if cache is already locked - requeue skb if so */
     if (test_and_set_bit(0, (void *)&lp->cache.lock) && !lp->interrupt)
-        return NETDEV_TX_LOCKED;
+                goto tx_err;
 
     /* Transmit descriptor ring full or stale skb */
     if (netif_queue_stopped(dev) || (u_long) lp->tx_skb[lp->tx_new] > 1) {
@@ -1519,6 +1519,9 @@ de4x5_queue_pkt(struct sk_buff *skb, struct net_device *dev)
     lp->cache.lock = 0;
 
     return NETDEV_TX_OK;
+tx_err:
+        dev_kfree_skb_any(skb);
+        return NETDEV_TX_OK;
 }
 
 /*
diff --git a/drivers/net/hamradio/baycom_epp.c b/drivers/net/hamradio/baycom_epp.c
index 72c9f1f352b4..eb6663866c9f 100644
--- a/drivers/net/hamradio/baycom_epp.c
+++ b/drivers/net/hamradio/baycom_epp.c
@@ -780,8 +780,10 @@ static int baycom_send_packet(struct sk_buff *skb, struct net_device *dev)
                 dev_kfree_skb(skb);
                 return NETDEV_TX_OK;
         }
-        if (bc->skb)
-                return NETDEV_TX_LOCKED;
+        if (bc->skb) {
+                dev_kfree_skb(skb);
+                return NETDEV_TX_OK;
+        }
         /* strip KISS byte */
         if (skb->len >= HDLCDRV_MAXFLEN+1 || skb->len < 3) {
                 dev_kfree_skb(skb);
diff --git a/drivers/net/hamradio/hdlcdrv.c b/drivers/net/hamradio/hdlcdrv.c
index 49fe59b180a8..4bad0b894e9c 100644
--- a/drivers/net/hamradio/hdlcdrv.c
+++ b/drivers/net/hamradio/hdlcdrv.c
@@ -412,8 +412,10 @@ static netdev_tx_t hdlcdrv_send_packet(struct sk_buff *skb,
                 dev_kfree_skb(skb);
                 return NETDEV_TX_OK;
         }
-        if (sm->skb)
-                return NETDEV_TX_LOCKED;
+        if (sm->skb) {
+                dev_kfree_skb(skb);
+                return NETDEV_TX_OK;
+        }
         netif_stop_queue(dev);
         sm->skb = skb;
         return NETDEV_TX_OK;