Fix a null dereference in module unload path.
Found by a simple modprobe icn ; rmmod icn
Signed-off-by: Dave Jones <[email protected]>
--- linux-2.6.12/drivers/isdn/icn/icn.c~ 2005-08-08 18:50:25.000000000 -0400
+++ linux-2.6.12/drivers/isdn/icn/icn.c 2005-08-08 18:54:13.000000000 -0400
@@ -1650,7 +1650,7 @@ static void __exit icn_exit(void)
{
isdn_ctrl cmd;
icn_card *card = cards;
- icn_card *last;
+ icn_card *last, *tmpcard;
int i;
unsigned long flags;
@@ -1670,8 +1670,9 @@ static void __exit icn_exit(void)
for (i = 0; i < ICN_BCH; i++)
icn_free_queue(card, i);
}
- card = card->next;
+ tmpcard = card->next;
spin_unlock_irqrestore(&card->lock, flags);
+ card = tmpcard;
}
card = cards;
cards = NULL;
-
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