[PATCH] icn driver fails to unload when no hardware present

Fix a null dereference in module unload path.

Found by a simple modprobe icn ; rmmod icn

Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/isdn/icn/icn.c b/drivers/isdn/icn/icn.c
index e0d1b01cc74c..386df71eee74 100644
--- a/drivers/isdn/icn/icn.c
+++ b/drivers/isdn/icn/icn.c
@@ -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;