ide: allow to wrap interrupt handler

Signed-off-by: Stanislaw Gruszka <stf_xl@wp.pl>
Cc: Andrew Victor <linux@maxim.org.za>
[bart: minor checkpatch.pl / CodingStyle fixups]
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-io.c

@@ -1162,6 +1162,7 @@ irqreturn_t ide_intr (int irq, void *dev_id)
 
 	return irq_ret;
 }
+EXPORT_SYMBOL_GPL(ide_intr);
 
 /**
  *	ide_do_drive_cmd	-	issue IDE special command

drivers/ide/ide-probe.c

@@ -950,6 +950,7 @@ static int ide_port_setup_devices(ide_hwif_t *hwif)
 static int init_irq (ide_hwif_t *hwif)
 {
 	struct ide_io_ports *io_ports = &hwif->io_ports;
+	irq_handler_t irq_handler;
 	int sa = 0;
 
 	mutex_lock(&ide_cfg_mtx);
@@ -959,6 +960,10 @@ static int init_irq (ide_hwif_t *hwif)
 	hwif->timer.function = &ide_timer_expiry;
 	hwif->timer.data = (unsigned long)hwif;
 
+	irq_handler = hwif->host->irq_handler;
+	if (irq_handler == NULL)
+		irq_handler = ide_intr;
+
 #if defined(__mc68000__)
 	sa = IRQF_SHARED;
 #endif /* __mc68000__ */
@@ -969,7 +974,7 @@ static int init_irq (ide_hwif_t *hwif)
 	if (io_ports->ctl_addr)
 		hwif->tp_ops->set_irq(hwif, 1);
 
-	if (request_irq(hwif->irq, &ide_intr, sa, hwif->name, hwif))
+	if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif))
 		goto out_up;
 
 	if (!hwif->rqsize) {

include/linux/ide.h

@@ -866,6 +866,7 @@ struct ide_host {
 	unsigned int	n_ports;
 	struct device	*dev[2];
 	unsigned int	(*init_chipset)(struct pci_dev *);
+	irq_handler_t	irq_handler;
 	unsigned long	host_flags;
 	void		*host_priv;
 	ide_hwif_t	*cur_port;	/* for hosts requiring serialization */