diff --git a/drivers/ide/pci/cs5530.c b/drivers/ide/pci/cs5530.c
index e5949b1..518f430 100644
--- a/drivers/ide/pci/cs5530.c
+++ b/drivers/ide/pci/cs5530.c
@@ -143,13 +143,11 @@
 	return 1;
 }
 
-static int cs5530_tune_chipset(ide_drive_t *drive, u8 mode)
+static int cs5530_tune_chipset(ide_drive_t *drive, const u8 mode)
 {
 	unsigned long basereg;
 	unsigned int reg, timings = 0;
 
-	mode = ide_rate_filter(drive, mode);
-
 	/*
 	 * Tell the drive to switch to the new mode; abort on failure.
 	 */