1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/ide/hpt366.c b/drivers/ide/hpt366.c
index f94baadbf424..0ceae5cbd89a 100644
--- a/drivers/ide/hpt366.c
+++ b/drivers/ide/hpt366.c
@@ -1012,7 +1012,7 @@ static int init_chipset_hpt366(struct pci_dev *dev)
                 pci_read_config_dword(dev, 0x40, &itr1);
 
                 /* Detect PCI clock by looking at cmd_high_time. */
-                switch((itr1 >> 8) & 0x07) {
+                switch ((itr1 >> 8) & 0x0f) {
                         case 0x09:
                                 pci_clk = 40;
                                 break;