syncppp: Fix crashes.

The syncppp layer wants a mid-level netdev private pointer.

It was using netdev->priv but that only worked by accident,
and thus this scheme was broken when the device private
allocation strategy changed.

Add a proper mid-layer private pointer for uses like this,
update syncppp and all users, and remove the HDLC_PPP broken
tag from drivers/net/wan/Kconfig

Signed-off-by: David S. Miller <davem@davemloft.net>

8 files changed, 21 insertions, 18 deletions

diff --git a/drivers/net/wan/Kconfig b/drivers/net/wan/Kconfig
index 8005dd16fb4e..d5140aed7b79 100644
--- a/drivers/net/wan/Kconfig
+++ b/drivers/net/wan/Kconfig
@@ -150,11 +150,9 @@ config HDLC_FR
 
 config HDLC_PPP
         tristate "Synchronous Point-to-Point Protocol (PPP) support"
-        depends on HDLC && BROKEN
+        depends on HDLC
         help
           Generic HDLC driver supporting PPP over WAN connections.
-          This module is currently broken and will cause a kernel panic
-          when a device configured in PPP mode is activated.
 
           It will be replaced by new PPP implementation in Linux 2.6.26.
 
diff --git a/drivers/net/wan/cosa.c b/drivers/net/wan/cosa.c
index 45ddfc9763cc..b0fce1387eaf 100644
--- a/drivers/net/wan/cosa.c
+++ b/drivers/net/wan/cosa.c
@@ -629,7 +629,7 @@ static void sppp_channel_init(struct channel_data *chan)
         d->base_addr = chan->cosa->datareg;
         d->irq = chan->cosa->irq;
         d->dma = chan->cosa->dma;
-        d->priv = chan;
+        d->ml_priv = chan;
         sppp_attach(&chan->pppdev);
         if (register_netdev(d)) {
                 printk(KERN_WARNING "%s: register_netdev failed.\n", d->name);
@@ -650,7 +650,7 @@ static void sppp_channel_delete(struct channel_data *chan)
 
 static int cosa_sppp_open(struct net_device *d)
 {
-        struct channel_data *chan = d->priv;
+        struct channel_data *chan = d->ml_priv;
         int err;
         unsigned long flags;
 
@@ -690,7 +690,7 @@ static int cosa_sppp_open(struct net_device *d)
 
 static int cosa_sppp_tx(struct sk_buff *skb, struct net_device *dev)
 {
-        struct channel_data *chan = dev->priv;
+        struct channel_data *chan = dev->ml_priv;
 
         netif_stop_queue(dev);
 
@@ -701,7 +701,7 @@ static int cosa_sppp_tx(struct sk_buff *skb, struct net_device *dev)
 
 static void cosa_sppp_timeout(struct net_device *dev)
 {
-        struct channel_data *chan = dev->priv;
+        struct channel_data *chan = dev->ml_priv;
 
         if (test_bit(RXBIT, &chan->cosa->rxtx)) {
                 chan->stats.rx_errors++;
@@ -720,7 +720,7 @@ static void cosa_sppp_timeout(struct net_device *dev)
 
 static int cosa_sppp_close(struct net_device *d)
 {
-        struct channel_data *chan = d->priv;
+        struct channel_data *chan = d->ml_priv;
         unsigned long flags;
 
         netif_stop_queue(d);
@@ -800,7 +800,7 @@ static int sppp_tx_done(struct channel_data *chan, int size)
 
 static struct net_device_stats *cosa_net_stats(struct net_device *dev)
 {
-        struct channel_data *chan = dev->priv;
+        struct channel_data *chan = dev->ml_priv;
         return &chan->stats;
 }
 
@@ -1217,7 +1217,7 @@ static int cosa_sppp_ioctl(struct net_device *dev, struct ifreq *ifr,
         int cmd)
 {
         int rv;
-        struct channel_data *chan = dev->priv;
+        struct channel_data *chan = dev->ml_priv;
         rv = cosa_ioctl_common(chan->cosa, chan, cmd, (unsigned long)ifr->ifr_data);
         if (rv == -ENOIOCTLCMD) {
                 return sppp_do_ioctl(dev, ifr, cmd);
diff --git a/drivers/net/wan/hdlc_ppp.c b/drivers/net/wan/hdlc_ppp.c
index 10396d9686f4..00308337928e 100644
--- a/drivers/net/wan/hdlc_ppp.c
+++ b/drivers/net/wan/hdlc_ppp.c
@@ -45,7 +45,7 @@ static int ppp_open(struct net_device *dev)
         int (*old_ioctl)(struct net_device *, struct ifreq *, int);
         int result;
 
-        dev->priv = &state(hdlc)->syncppp_ptr;
+        dev->ml_priv = &state(hdlc)->syncppp_ptr;
         state(hdlc)->syncppp_ptr = &state(hdlc)->pppdev;
         state(hdlc)->pppdev.dev = dev;
 
diff --git a/drivers/net/wan/hostess_sv11.c b/drivers/net/wan/hostess_sv11.c
index 83dbc924fcb5..f3065d3473fd 100644
--- a/drivers/net/wan/hostess_sv11.c
+++ b/drivers/net/wan/hostess_sv11.c
@@ -75,7 +75,7 @@ static void hostess_input(struct z8530_channel *c, struct sk_buff *skb)
  
 static int hostess_open(struct net_device *d)
 {
-        struct sv11_device *sv11=d->priv;
+        struct sv11_device *sv11=d->ml_priv;
         int err = -1;
         
         /*
@@ -128,7 +128,7 @@ static int hostess_open(struct net_device *d)
 
 static int hostess_close(struct net_device *d)
 {
-        struct sv11_device *sv11=d->priv;
+        struct sv11_device *sv11=d->ml_priv;
         /*
          *      Discard new frames
          */
@@ -159,14 +159,14 @@ static int hostess_close(struct net_device *d)
 
 static int hostess_ioctl(struct net_device *d, struct ifreq *ifr, int cmd)
 {
-        /* struct sv11_device *sv11=d->priv;
+        /* struct sv11_device *sv11=d->ml_priv;
            z8530_ioctl(d,&sv11->sync.chanA,ifr,cmd) */
         return sppp_do_ioctl(d, ifr,cmd);
 }
 
 static struct net_device_stats *hostess_get_stats(struct net_device *d)
 {
-        struct sv11_device *sv11=d->priv;
+        struct sv11_device *sv11=d->ml_priv;
         if(sv11)
                 return z8530_get_stats(&sv11->sync.chanA);
         else
@@ -179,7 +179,7 @@ static struct net_device_stats *hostess_get_stats(struct net_device *d)
  
 static int hostess_queue_xmit(struct sk_buff *skb, struct net_device *d)
 {
-        struct sv11_device *sv11=d->priv;
+        struct sv11_device *sv11=d->ml_priv;
         return z8530_queue_xmit(&sv11->sync.chanA, skb);
 }
 
@@ -325,6 +325,7 @@ static struct sv11_device *sv11_init(int iobase, int irq)
                 /* 
                  *      Initialise the PPP components
                  */
+                d->ml_priv = sv;
                 sppp_attach(&sv->netdev);
                 
                 /*
@@ -333,7 +334,6 @@ static struct sv11_device *sv11_init(int iobase, int irq)
                 
                 d->base_addr = iobase;
                 d->irq = irq;
-                d->priv = sv;
                 
                 if(register_netdev(d))
                 {
diff --git a/drivers/net/wan/lmc/lmc_main.c b/drivers/net/wan/lmc/lmc_main.c
index 6635ecef36e5..62133cee446a 100644
--- a/drivers/net/wan/lmc/lmc_main.c
+++ b/drivers/net/wan/lmc/lmc_main.c
@@ -891,6 +891,7 @@ static int __devinit lmc_init_one(struct pci_dev *pdev,
 
     /* Initialize the sppp layer */
     /* An ioctl can cause a subsequent detach for raw frame interface */
+    dev->ml_priv = sc;
     sc->if_type = LMC_PPP;
     sc->check = 0xBEAFCAFE;
     dev->base_addr = pci_resource_start(pdev, 0);
diff --git a/drivers/net/wan/sealevel.c b/drivers/net/wan/sealevel.c
index 11276bf3149f..44a89df1b8bf 100644
--- a/drivers/net/wan/sealevel.c
+++ b/drivers/net/wan/sealevel.c
@@ -241,6 +241,7 @@ static inline struct slvl_device *slvl_alloc(int iobase, int irq)
                 return NULL;
 
         sv = d->priv;
+        d->ml_priv = sv;
         sv->if_ptr = &sv->pppdev;
         sv->pppdev.dev = d;
         d->base_addr = iobase;
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 7c1d4466583b..746901774d49 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -715,6 +715,9 @@ struct net_device
         struct net              *nd_net;
 #endif
 
+        /* mid-layer private */
+        void                    *ml_priv;
+
         /* bridge stuff */
         struct net_bridge_port  *br_port;
         /* macvlan */
diff --git a/include/net/syncppp.h b/include/net/syncppp.h
index 877efa434700..e43f4070d892 100644
--- a/include/net/syncppp.h
+++ b/include/net/syncppp.h
@@ -59,7 +59,7 @@ struct ppp_device
 
 static inline struct sppp *sppp_of(struct net_device *dev) 
 {
-        struct ppp_device **ppp = dev->priv;
+        struct ppp_device **ppp = dev->ml_priv;
         BUG_ON((*ppp)->dev != dev);
         return &(*ppp)->sppp;
 }