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Commit 4951704b authored by David S. Miller's avatar David S. Miller
Browse files

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: default avatarDavid S. Miller <davem@davemloft.net>
parent c4492586

drivers/net/wan/Kconfig

+1 −3
Original line number Diff line number Diff line
@@ -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.

drivers/net/wan/cosa.c

+7 −7
Original line number Diff line number Diff line
@@ -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);

drivers/net/wan/hdlc_ppp.c

+1 −1
Original line number Diff line number Diff line
@@ -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;

drivers/net/wan/hostess_sv11.c

+6 −6
Original line number Diff line number Diff line
@@ -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))

		{

drivers/net/wan/lmc/lmc_main.c

+1 −0
Original line number Diff line number Diff line
@@ -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);