[PATCH][2.4/2.5] Fix ns83820 ioctl oops

[Roger Luethi]

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Patch fixes the line mistaking a null pointer for an actual reference.
Also, to prevent this from happening again, the null pointer now is
replaced with the real one. Please apply.

Roger

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--- drivers/net/ns83820.c.orig	Wed Nov 20 12:51:37 2002
+++ drivers/net/ns83820.c	Tue Nov 26 12:51:39 2002
@@ -1214,7 +1214,7 @@ static int ns83820_ethtool_ioctl (struct
 
 static int ns83820_ioctl(struct net_device *_dev, struct ifreq *rq, int cmd)
 {
-	struct ns83820 *dev = _dev->priv;
+	struct ns83820 *dev = (struct ns83820 *)_dev;
 
 	switch(cmd) {
 	case SIOCETHTOOL:
@@ -1788,6 +1788,7 @@ static int __devinit ns83820_init_one(st
 	dev->ee.cache = &dev->MEAR_cache;
 	dev->ee.lock = &dev->misc_lock;
 	dev->net_dev.owner = THIS_MODULE;
+	dev->net_dev.priv = dev;
 
 	PREPARE_TQUEUE(&dev->tq_refill, queue_refill, dev);
 	tasklet_init(&dev->rx_tasklet, rx_action, (unsigned long)dev);

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