1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/ide/pci/cmd640.c b/drivers/ide/pci/cmd640.c
index 0f6f11e69807..6e7a6faa480e 100644
--- a/drivers/ide/pci/cmd640.c
+++ b/drivers/ide/pci/cmd640.c
@@ -552,7 +552,14 @@ static void cmd640_set_mode(ide_drive_t *drive, unsigned int index,
 {
         int setup_time, active_time, recovery_time, clock_time;
         u8 setup_count, active_count, recovery_count, recovery_count2, cycle_count;
-        int bus_speed = system_bus_clock();
+        int bus_speed;
+
+        if (cmd640_vlb && ide_vlb_clk)
+                bus_speed = ide_vlb_clk;
+        else if (!cmd640_vlb && ide_pci_clk)
+                bus_speed = ide_pci_clk;
+        else
+                bus_speed = system_bus_clock();
 
         if (pio_mode > 5)
                 pio_mode = 5;