vid_from_reg: Trim the VID value to the correct number of bits for each VRM.

Original patch by Rudolf Marek, backported from Linux 2.6.


git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@4292 7894878c-1315-0410-8ee3-d5d059ff63e0

kernel/include/sensors_vid.h

@@ -58,6 +58,7 @@ static inline int vid_from_reg(int val, int vrm)
 	switch(vrm) {
 
 	case 100:		/* VRD 10.0 */
+		val &= 0x3f;
 		if((val & 0x1f) == 0x1f)
 			return 0;
 		if((val & 0x1f) <= 0x09 || val == 0x0a)
@@ -70,14 +71,17 @@ static inline int vid_from_reg(int val, int 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));
@@ -86,6 +90,7 @@ static inline int vid_from_reg(int val, int vrm)
 		val &= 0x0f;
 				/* fall through */
 	default:		/* VRM 8.2 */
+		val &= 0x1f;
 		return(val == 0x1f ? 0 :
 		       val & 0x10  ? 5100 - (val) * 100 :
 		                     2050 - (val) * 50);