diff --git a/drivers/ide/ide-generic.c b/drivers/ide/ide-generic.c
index be469dbbe8fb2760652e383e8889300c3f5b7682..709b9e4d2871239f75c8f6b8f59834f8375f003f 100644
--- a/drivers/ide/ide-generic.c
+++ b/drivers/ide/ide-generic.c
@@ -20,8 +20,14 @@ static int __init ide_generic_init(void)
 	if (ide_hwifs[0].io_ports[IDE_DATA_OFFSET])
 		ide_get_lock(NULL, NULL); /* for atari only */
 
-	for (i = 0; i < MAX_HWIFS; i++)
-		idx[i] = ide_hwifs[i].present ? 0xff : i;
+	for (i = 0; i < MAX_HWIFS; i++) {
+		ide_hwif_t *hwif = &ide_hwifs[i];
+
+		if (hwif->io_ports[IDE_DATA_OFFSET] && !hwif->present)
+			idx[i] = i;
+		else
+			idx[i] = 0xff;
+	}
 
 	ide_device_add_all(idx, NULL);