cs5520: fix PIO auto-tuning in ->ide_dma_check method

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/pci/cs5520.c b/drivers/ide/pci/cs5520.c
index bccedf9..b89e816 100644
--- a/drivers/ide/pci/cs5520.c
+++ b/drivers/ide/pci/cs5520.c
@@ -133,7 +133,7 @@
 static int cs5520_config_drive_xfer_rate(ide_drive_t *drive)
 {
 	/* Tune the drive for PIO modes up to PIO 4 */	
-	cs5520_tune_drive(drive, 4);
+	cs5520_tune_drive(drive, 255);
 
 	/* Then tell the core to use DMA operations */
 	return 0;