1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/hwmon/hwmon-vid.c b/drivers/hwmon/hwmon-vid.c
index a74a44f16f51..b0fd267635bb 100644
--- a/drivers/hwmon/hwmon-vid.c
+++ b/drivers/hwmon/hwmon-vid.c
@@ -70,6 +70,7 @@ int vid_from_reg(int val, u8 vrm)
         switch(vrm) {
 
         case 100:               /* VRD 10.0 */
+                val &= 0x3f;
                 if((val & 0x1f) == 0x1f)
                         return 0;
                 if((val & 0x1f) <= 0x09 || val == 0x0a)
@@ -82,14 +83,17 @@ int vid_from_reg(int val, u8 vrm)
                 return vid;
 
         case 24:                /* Opteron processor */
+                val &= 0x1f;
                 return(val == 0x1f ? 0 : 1550 - val * 25);
 
         case 91:                /* VRM 9.1 */
         case 90:                /* VRM 9.0 */
+                val &= 0x1f;
                 return(val == 0x1f ? 0 :
                                        1850 - val * 25);
 
         case 85:                /* VRM 8.5 */
+                val &= 0x1f;
                 return((val & 0x10  ? 25 : 0) +
                        ((val & 0x0f) > 0x04 ? 2050 : 1250) -
                        ((val & 0x0f) * 50));
@@ -98,14 +102,17 @@ int vid_from_reg(int val, u8 vrm)
                 val &= 0x0f;
                                 /* fall through */
         case 82:                /* VRM 8.2 */
+                val &= 0x1f;
                 return(val == 0x1f ? 0 :
                        val & 0x10  ? 5100 - (val) * 100 :
                                      2050 - (val) * 50);
         case 17:                /* Intel IMVP-II */
+                val &= 0x1f;
                 return(val & 0x10 ? 975 - (val & 0xF) * 25 :
                                     1750 - val * 50);
         case 13:
-                return(1708 - (val & 0x3f) * 16);
+                val &= 0x3f;
+                return(1708 - val * 16);
         default:                /* report 0 for unknown */
                 printk(KERN_INFO "hwmon-vid: requested unknown VRM version\n");
                 return 0;