CAPI: Issue synchronous hangup on capincci_free_minor

capincci_free and, thus, capincci_free_minor runs in process context, so
we can issue the hangup of the associated TTY synchronously.
Signed-off-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/isdn/capi/capi.c

@@ -351,7 +351,7 @@ static void capincci_free_minor(struct capincci *np)
 #ifdef _DEBUG_REFCOUNT
 			printk(KERN_DEBUG "reset mp->nccip\n");
 #endif
-			tty_hangup(tty);
+			tty_vhangup(tty);
 			tty_kref_put(tty);
 		}