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| author | Juerg Haefliger <juergh@gmail.com> | 2008-01-27 16:39:46 -0800 |
|---|---|---|
| committer | Mark M. Hoffman <mhoffman@lightlink.com> | 2008-02-07 20:39:44 -0500 |
| commit | ff8421f733c91a70d8edadf9ce2842fca66172fa (patch) | |
| tree | 28d94de65d92990a215029ad0257806afaa189df /drivers/hwmon/dme1737.c | |
| parent | cb96b8ca11644ee1223e0fb3f1f629ead15203cb (diff) | |
| download | linux-ff8421f733c91a70d8edadf9ce2842fca66172fa.tar.gz linux-ff8421f733c91a70d8edadf9ce2842fca66172fa.tar.bz2 linux-ff8421f733c91a70d8edadf9ce2842fca66172fa.zip | |
hwmon: (dme1737) fix divide-by-0
This patch fixes a possible divide-by-0 and a minor bug in the
FAN_FROM_REG macro (in TPC mode).
Signed-off-by: Juerg Haefliger <juergh at gmail.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
Diffstat (limited to 'drivers/hwmon/dme1737.c')
| -rw-r--r-- | drivers/hwmon/dme1737.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/hwmon/dme1737.c b/drivers/hwmon/dme1737.c index 85064fb0b7c2..307f48de051f 100644 --- a/drivers/hwmon/dme1737.c +++ b/drivers/hwmon/dme1737.c @@ -283,14 +283,21 @@ static inline int TEMP_HYST_TO_REG(int val, int ix, int reg) /* Fan input RPM */ static inline int FAN_FROM_REG(int reg, int tpc) { - return (reg == 0 || reg == 0xffff) ? 0 : - (tpc == 0) ? 90000 * 60 / reg : tpc * reg; + if (tpc) { + return tpc * reg; + } else { + return (reg == 0 || reg == 0xffff) ? 0 : 90000 * 60 / reg; + } } static inline int FAN_TO_REG(int val, int tpc) { - return SENSORS_LIMIT((tpc == 0) ? 90000 * 60 / val : val / tpc, - 0, 0xffff); + if (tpc) { + return SENSORS_LIMIT(val / tpc, 0, 0xffff); + } else { + return (val <= 0) ? 0xffff : + SENSORS_LIMIT(90000 * 60 / val, 0, 0xfffe); + } } /* Fan TPC (tach pulse count) |