1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/ide/pci/pdc202xx_new.c b/drivers/ide/pci/pdc202xx_new.c
index f74a02aba581..7b0e479c355c 100644
--- a/drivers/ide/pci/pdc202xx_new.c
+++ b/drivers/ide/pci/pdc202xx_new.c
@@ -341,7 +341,7 @@ static long __devinit detect_pll_input_clock(unsigned long dma_base)
          */
         usec_elapsed = (end_time.tv_sec - start_time.tv_sec) * 1000000 +
                 (end_time.tv_usec - start_time.tv_usec);
-        pll_input = ((start_count - end_count) & 0x3ffffff) / 10 *
+        pll_input = ((start_count - end_count) & 0x3fffffff) / 10 *
                 (10000000 / usec_elapsed);
 
         DBG("start[%ld] end[%ld]\n", start_count, end_count);