if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
                wake_up_interruptible(&info->open_wait);
 #ifdef CONFIG_CYZ_INTR
-       if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
-               if (cyz_rx_full_timer[info->line].function == NULL) {
-                       cyz_rx_full_timer[info->line].expires = jiffies + 1;
-                       cyz_rx_full_timer[info->line].function = cyz_rx_restart;
-                       cyz_rx_full_timer[info->line].data =
-                                               (unsigned long)info;
-                       add_timer(&cyz_rx_full_timer[info->line]);
-               }
-       }
+       if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event) &&
+                       !timer_pending(&cyz_rx_full_timer[info->line]))
+               mod_timer(&cyz_rx_full_timer[info->line], jiffies + 1);
 #endif
        if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
                wake_up_interruptible(&info->delta_msr_wait);
                printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
                        info->line, retval);
        }
-       cyz_rx_full_timer[info->line].function = NULL;
        CY_UNLOCK(info, flags);
 }
 
                        else
                                info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
 #ifdef CONFIG_CYZ_INTR
-                       init_timer(&cyz_rx_full_timer[port]);
-                       cyz_rx_full_timer[port].function = NULL;
+                       setup_timer(&cyz_rx_full_timer[port],
+                               cyz_rx_restart, (unsigned long)info);
 #endif
                } else {
                        info->type = PORT_CIRRUS;