diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c
index 5540216e64fd..7607c6ebd39a 100644
--- a/drivers/tty/amiserial.c
+++ b/drivers/tty/amiserial.c
@@ -100,8 +100,6 @@ static struct tty_driver *serial_driver;
 /* number of characters left in xmit buffer before we ask for more */
 #define WAKEUP_CHARS 256
 
-static struct async_struct *IRQ_ports;
-
 static unsigned char current_ctl_bits;
 
 static void change_speed(struct async_struct *info, struct ktermios *old);
@@ -439,7 +437,7 @@ static void check_modem_status(struct async_struct *info)
 static irqreturn_t ser_vbl_int( int irq, void *data)
 {
         /* vbl is just a periodic interrupt we tie into to update modem status */
-	struct async_struct * info = IRQ_ports;
+	struct async_struct *info = data;
 	/*
 	 * TBD - is it better to unregister from this interrupt or to
 	 * ignore it if MSI is clear ?
@@ -451,13 +449,13 @@ static irqreturn_t ser_vbl_int( int irq, void *data)
 
 static irqreturn_t ser_rx_int(int irq, void *dev_id)
 {
-	struct async_struct * info;
+	struct serial_state *state = dev_id;
+	struct async_struct *info = state->info;
 
 #ifdef SERIAL_DEBUG_INTR
 	printk("ser_rx_int...");
 #endif
 
-	info = IRQ_ports;
 	if (!info || !info->tty)
 		return IRQ_NONE;
 
@@ -470,14 +468,14 @@ static irqreturn_t ser_rx_int(int irq, void *dev_id)
 
 static irqreturn_t ser_tx_int(int irq, void *dev_id)
 {
-	struct async_struct * info;
+	struct serial_state *state = dev_id;
+	struct async_struct *info = state->info;
 
 	if (custom.serdatr & SDR_TBE) {
 #ifdef SERIAL_DEBUG_INTR
 	  printk("ser_tx_int...");
 #endif
 
-	  info = IRQ_ports;
 	  if (!info || !info->tty)
 		return IRQ_NONE;
 
@@ -554,8 +552,6 @@ static int startup(struct async_struct * info)
 	/* remember current state of the DCD and CTS bits */
 	current_ctl_bits = ciab.pra & (SER_DCD | SER_CTS | SER_DSR);
 
-	IRQ_ports = info;
-
 	info->MCR = 0;
 	if (info->tty->termios->c_cflag & CBAUD)
 	  info->MCR = SER_DTR | SER_RTS;
@@ -619,8 +615,6 @@ static void shutdown(struct async_struct * info)
 	 */
 	wake_up_interruptible(&info->delta_msr_wait);
 
-	IRQ_ports = NULL;
-
 	/*
 	 * Free the IRQ, if necessary
 	 */
@@ -1913,8 +1907,6 @@ static int __init amiga_serial_probe(struct platform_device *pdev)
 	if (!serial_driver)
 		return -ENOMEM;
 
-	IRQ_ports = NULL;
-
 	show_serial_version();
 
 	/* Initialize the tty_driver structure */