if (!SIBYTE_HAVE_IDE)
                return -ENODEV;
 
-       hwif = ide_find_port_slot(&swarm_port_info);
-       if (hwif == NULL)
-               return -ENOMEM;
-
        base = ioremap(A_IO_EXT_BASE, 0x800);
        offset = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_START_ADDR, IDE_CS));
        size = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_MULT_SIZE, IDE_CS));
 
        base = ioremap(offset, size);
 
-       /* Setup MMIO ops.  */
-       default_hwif_mmiops(hwif);
-
        for (i = 0; i <= 7; i++)
                hw.io_ports_array[i] =
                                (unsigned long)(base + ((0x1f0 + i) << 5));
        hw.irq = K_INT_GB_IDE;
        hw.chipset = ide_generic;
 
+       hwif = ide_find_port_slot(&swarm_port_info);
+       if (hwif == NULL)
+               goto err;
+
        ide_init_port_hw(hwif, &hw);
 
+       /* Setup MMIO ops. */
+       default_hwif_mmiops(hwif);
+
        idx[0] = hwif->index;
 
        ide_device_add(idx, &swarm_port_info);
        dev_set_drvdata(dev, hwif);
 
        return 0;
+err:
+       release_resource(&swarm_ide_resource);
+       iounmap(base);
+       return -ENOMEM;
 }
 
 static struct device_driver swarm_ide_driver = {