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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>
This commit is contained in:
David S. Miller 2008-05-12 03:29:11 -07:00
parent c4492586a6
commit 4951704b4e
8 changed files with 21 additions and 18 deletions
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4
drivers/net/wan/Kconfig
View File

@ -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.

14
drivers/net/wan/cosa.c
View File

@ -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);

2
drivers/net/wan/hdlc_ppp.c
View File

@ -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;

12
drivers/net/wan/hostess_sv11.c
View File

@ -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))
{

1
drivers/net/wan/lmc/lmc_main.c
View File

@ -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);

1
drivers/net/wan/sealevel.c
View File

@ -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;

3
include/linux/netdevice.h
View File

@ -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 */

2
include/net/syncppp.h
View File

@ -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;
}