diff --git a/drivers/isdn/teles/callc.c b/drivers/isdn/teles/callc.c
index 8cf6869f..4f96325c 100644
--- a/drivers/isdn/teles/callc.c
+++ b/drivers/isdn/teles/callc.c
@@ -1,6 +1,9 @@
 /* $Id$
  *
  * $Log$
+ * Revision 1.12  1996/06/12 16:15:33  fritz
+ * Extended user-configurable debugging flags.
+ *
  * Revision 1.11  1996/06/07 12:32:20  fritz
  * More changes to support suspend/resume.
  *
@@ -1421,12 +1424,15 @@ teles_writebuf(int id, int chan, const u_char * buf, int count, int user)
 
 	if (!chanp->data_open) {
 		printk(KERN_DEBUG "teles_writebuf: channel not open\n");
-		return -ENOMEM;
+		return -EIO;
 	}
 	
         err = BufPoolGet(&ibh, st->l1.sbufpool, GFP_ATOMIC, st, 21);
         if (err)
-                return -ENOMEM;
+                /* Must return 0 here, since this is not an error
+                 * but a temporary lack of resources.
+                 */
+                return 0;
 
         ptr = DATAPTR(ibh);
         if (chanp->lc_b.l2_establish)