[PATCH] dev->priv to netdev_priv(dev), for drivers/net/wireless

Replacing accesses to dev->priv to netdev_priv(dev). The replacment
is safe when netdev_priv is used to access a private structure that is
right next to the net_device structure in memory. Cf
http://groups.google.com/group/comp.os.linux.development.system/browse_thread/thread/de19321bcd94dbb8/0d74a4adcd6177bd
This is the case when the net_device structure was allocated with
a call to alloc_netdev or one of its derivative.
Signed-off-by: Yoann Padioleau <padator@wanadoo.fr>
Cc: mcgrof@gmail.com
Cc: linux-wireless@vger.kernel.org
Cc: akpm@linux-foundation.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/arlan-proc.c

@@ -435,7 +435,7 @@ static int arlan_sysctl_info(ctl_table * ctl, int write, struct file *filp,
 		goto final;
 	}
 	else
-		priva = arlan_device[devnum]->priv;
+		priva = netdev_priv(arlan_device[devnum]);
 
 	if (priva == NULL)
 	{
@@ -654,7 +654,7 @@ static int arlan_sysctl_info161719(ctl_table * ctl, int write, struct file *filp
 		goto final;
 	}
 	else
-		priva = arlan_device[devnum]->priv;
+		priva = netdev_priv(arlan_device[devnum]);
 	if (priva == NULL)
 	{
 		printk(KERN_WARNING " Could not find the device private in arlan procsys, bad\n ");
@@ -688,7 +688,7 @@ static int arlan_sysctl_infotxRing(ctl_table * ctl, int write, struct file *filp
 		  goto final;
 	}
 	else
-		priva = arlan_device[devnum]->priv;
+		priva = netdev_priv(arlan_device[devnum]);
 	if (priva == NULL)
 	{
 		printk(KERN_WARNING " Could not find the device private in arlan procsys, bad\n ");
@@ -716,7 +716,7 @@ static int arlan_sysctl_inforxRing(ctl_table * ctl, int write, struct file *filp
 		  pos += sprintf(arlan_drive_info + pos, "No device found here \n");
 		  goto final;
 	} else
-		priva = arlan_device[devnum]->priv;
+		priva = netdev_priv(arlan_device[devnum]);
 	if (priva == NULL)
 	{
 		printk(KERN_WARNING " Could not find the device private in arlan procsys, bad\n ");
@@ -745,7 +745,7 @@ static int arlan_sysctl_info18(ctl_table * ctl, int write, struct file *filp,
 		goto final;
 	}
 	else
-		priva = arlan_device[devnum]->priv;
+		priva = netdev_priv(arlan_device[devnum]);
 	if (priva == NULL)
 	{
 		printk(KERN_WARNING " Could not find the device private in arlan procsys, bad\n ");
@@ -780,7 +780,7 @@ static int arlan_configure(ctl_table * ctl, int write, struct file *filp,
 	}
 	else if (arlan_device[devnum] != NULL)
 	{
-		  priv = arlan_device[devnum]->priv;
+		  priv = netdev_priv(arlan_device[devnum]);
 
 		  arlan_command(arlan_device[devnum], ARLAN_COMMAND_CLEAN_AND_CONF);
 	}
@@ -805,7 +805,7 @@ static int arlan_sysctl_reset(ctl_table * ctl, int write, struct file *filp,
 	}
 	else if (arlan_device[devnum] != NULL)
 	{
-		priv = arlan_device[devnum]->priv;
+		priv = netdev_priv(arlan_device[devnum]);
 		arlan_command(arlan_device[devnum], ARLAN_COMMAND_CLEAN_AND_RESET);
 
 	} else

drivers/net/wireless/hostap/hostap_cs.c

@@ -272,7 +272,7 @@ static int sandisk_enable_wireless(struct net_device *dev)
 {
 	int res, ret = 0;
 	conf_reg_t reg;
-	struct hostap_interface *iface = dev->priv;
+	struct hostap_interface *iface = netdev_priv(dev);
 	local_info_t *local = iface->local;
 	tuple_t tuple;
 	cisparse_t *parse = NULL;

drivers/net/wireless/hostap/hostap_hw.c

@@ -3424,7 +3424,7 @@ static void prism2_suspend(struct net_device *dev)
 	struct local_info *local;
 	union iwreq_data wrqu;
 
-	iface = dev->priv;
+	iface = netdev_priv(dev);
 	local = iface->local;
 
 	/* Send disconnect event, e.g., to trigger reassociation after resume

drivers/net/wireless/hostap/hostap_ioctl.c

@@ -3088,7 +3088,7 @@ static int prism2_ioctl_priv_download(local_info_t *local, struct iw_point *p)
 static int prism2_set_genericelement(struct net_device *dev, u8 *elem,
 				     size_t len)
 {
-	struct hostap_interface *iface = dev->priv;
+	struct hostap_interface *iface = netdev_priv(dev);
 	local_info_t *local = iface->local;
 	u8 *buf;
 
@@ -3116,7 +3116,7 @@ static int prism2_ioctl_siwauth(struct net_device *dev,
 				struct iw_request_info *info,
 				struct iw_param *data, char *extra)
 {
-	struct hostap_interface *iface = dev->priv;
+	struct hostap_interface *iface = netdev_priv(dev);
 	local_info_t *local = iface->local;
 
 	switch (data->flags & IW_AUTH_INDEX) {
@@ -3182,7 +3182,7 @@ static int prism2_ioctl_giwauth(struct net_device *dev,
 				struct iw_request_info *info,
 				struct iw_param *data, char *extra)
 {
-	struct hostap_interface *iface = dev->priv;
+	struct hostap_interface *iface = netdev_priv(dev);
 	local_info_t *local = iface->local;
 
 	switch (data->flags & IW_AUTH_INDEX) {
@@ -3221,7 +3221,7 @@ static int prism2_ioctl_siwencodeext(struct net_device *dev,
 				     struct iw_request_info *info,
 				     struct iw_point *erq, char *extra)
 {
-	struct hostap_interface *iface = dev->priv;
+	struct hostap_interface *iface = netdev_priv(dev);
 	local_info_t *local = iface->local;
 	struct iw_encode_ext *ext = (struct iw_encode_ext *) extra;
 	int i, ret = 0;
@@ -3395,7 +3395,7 @@ static int prism2_ioctl_giwencodeext(struct net_device *dev,
 				     struct iw_request_info *info,
 				     struct iw_point *erq, char *extra)
 {
-	struct hostap_interface *iface = dev->priv;
+	struct hostap_interface *iface = netdev_priv(dev);
 	local_info_t *local = iface->local;
 	struct ieee80211_crypt_data **crypt;
 	void *sta_ptr;
@@ -3716,7 +3716,7 @@ static int prism2_ioctl_giwgenie(struct net_device *dev,
 				 struct iw_request_info *info,
 				 struct iw_point *data, char *extra)
 {
-	struct hostap_interface *iface = dev->priv;
+	struct hostap_interface *iface = netdev_priv(dev);
 	local_info_t *local = iface->local;
 	int len = local->generic_elem_len - 2;
 
@@ -3755,7 +3755,7 @@ static int prism2_ioctl_siwmlme(struct net_device *dev,
 				struct iw_request_info *info,
 				struct iw_point *data, char *extra)
 {
-	struct hostap_interface *iface = dev->priv;
+	struct hostap_interface *iface = netdev_priv(dev);
 	local_info_t *local = iface->local;
 	struct iw_mlme *mlme = (struct iw_mlme *) extra;
 	u16 reason;

drivers/net/wireless/orinoco_tmd.c

@@ -190,7 +190,7 @@ static int orinoco_tmd_init_one(struct pci_dev *pdev,
 static void __devexit orinoco_tmd_remove_one(struct pci_dev *pdev)
 {
 	struct net_device *dev = pci_get_drvdata(pdev);
-	struct orinoco_private *priv = dev->priv;
+	struct orinoco_private *priv = netdev_priv(dev);
 	struct orinoco_pci_card *card = priv->card;
 
 	unregister_netdev(dev);

drivers/net/wireless/prism54/isl_ioctl.c

@@ -1753,7 +1753,7 @@ prism54_get_oid(struct net_device *ndev, struct iw_request_info *info,
 	int rvalue;
 	enum oid_num_t n = dwrq->flags;
 
-	rvalue = mgt_get_request((islpci_private *) ndev->priv, n, 0, NULL, &r);
+	rvalue = mgt_get_request(netdev_priv(ndev), n, 0, NULL, &r);
 	dwrq->length = mgt_response_to_str(n, &r, extra);
 	if ((isl_oid[n].flags & OID_FLAG_TYPE) != OID_TYPE_U32)
 		kfree(r.ptr);
@@ -1766,7 +1766,7 @@ prism54_set_u32(struct net_device *ndev, struct iw_request_info *info,
 {
 	u32 oid = uwrq[0], u = uwrq[1];
 
-	return mgt_set_request((islpci_private *) ndev->priv, oid, 0, &u);
+	return mgt_set_request(netdev_priv(ndev), oid, 0, &u);
 }
 
 static int
@@ -1775,7 +1775,7 @@ prism54_set_raw(struct net_device *ndev, struct iw_request_info *info,
 {
 	u32 oid = dwrq->flags;
 
-	return mgt_set_request((islpci_private *) ndev->priv, oid, 0, extra);
+	return mgt_set_request(netdev_priv(ndev), oid, 0, extra);
 }
 
 void

drivers/net/wireless/strip.c

@@ -2572,7 +2572,7 @@ static struct strip *strip_alloc(void)
 		return NULL;	/* If no more memory, return */
 
 
-	strip_info = dev->priv;
+	strip_info = netdev_priv(dev);
 	strip_info->dev = dev;
 
 	strip_info->magic = STRIP_MAGIC;