add a missing return to drivers/isdn/hisax/ipacx.c

@@ -728,13 +728,15 @@
 
 int
 ipacx_setup(struct IsdnCardState *cs, struct dc_hw_ops *ipacx_dc_ops,
 	    struct bc_hw_ops *ipacx_bc_ops)
 {
 	u8 val;
 
 	cs->dc_hw_ops = ipacx_dc_ops;
 	cs->bc_hw_ops = ipacx_bc_ops;
 	val = ipacx_read_reg(cs, IPACX_ID) & 0x3f;
 	printk(KERN_INFO "HiSax: IPACX Design Id: %#x\n", val);
+
+	return 0;
 }