diff --git a/drivers/ide/it821x.c b/drivers/ide/it821x.c
index 983440a..e1c4f54 100644
--- a/drivers/ide/it821x.c
+++ b/drivers/ide/it821x.c
@@ -560,8 +560,7 @@
 	 *	this is necessary.
 	 */
 
-	pci_read_config_byte(dev, 0x08, &conf);
-	if (conf == 0x10) {
+	if (dev->revision == 0x10) {
 		idev->timing10 = 1;
 		hwif->host_flags |= IDE_HFLAG_NO_ATAPI_DMA;
 		if (idev->smart == 0)