1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/hwmon/smsc47b397.c b/drivers/hwmon/smsc47b397.c
index 943abbd95ab5..45266b30ce1d 100644
--- a/drivers/hwmon/smsc47b397.c
+++ b/drivers/hwmon/smsc47b397.c
@@ -174,6 +174,8 @@ static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
    REG: count of 90kHz pulses / revolution */
 static int fan_from_reg(u16 reg)
 {
+        if (reg == 0 || reg == 0xffff)
+                return 0;
         return 90000 * 60 / reg;
 }
 
@@ -333,7 +335,7 @@ static int __init smsc47b397_find(unsigned short *addr)
         superio_enter();
         id = superio_inb(SUPERIO_REG_DEVID);
 
-        if ((id != 0x6f) && (id != 0x81)) {
+        if ((id != 0x6f) && (id != 0x81) && (id != 0x85)) {
                 superio_exit();
                 return -ENODEV;
         }
@@ -346,7 +348,8 @@ static int __init smsc47b397_find(unsigned short *addr)
 
         printk(KERN_INFO DRVNAME ": found SMSC %s "
                 "(base address 0x%04x, revision %u)\n",
-                id == 0x81 ? "SCH5307-NS" : "LPC47B397-NC", *addr, rev);
+                id == 0x81 ? "SCH5307-NS" : id == 0x85 ? "SCH5317" :
+               "LPC47B397-NC", *addr, rev);
 
         superio_exit();
         return 0;