scsi: mac_esp: fix to pass correct device identity to free_irq()

free_irq() expects the same device identity that was passed to
corresponding request_irq(), otherwise the IRQ is not freed.
Signed-off-by: NWei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/mac_esp.c

@@ -587,7 +587,7 @@ static int esp_mac_probe(struct platform_device *dev)
 	esp_chips[dev->id] = NULL;
 	if (esp_chips[!dev->id] == NULL) {
 		spin_unlock(&esp_chips_lock);
-		free_irq(host->irq, esp);
+		free_irq(host->irq, NULL);
 	} else
 		spin_unlock(&esp_chips_lock);
 fail_free_priv: