diff options
| author | Eduardo Valentin <eduardo.valentin@ti.com> | 2013-11-13 19:11:09 +0100 |
|---|---|---|
| committer | Zhang Rui <rui.zhang@intel.com> | 2014-01-02 04:54:14 +0100 |
| commit | 1c9573a40c1d34494419f32560f28c763c504d79 (patch) | |
| tree | ab8727f4e9452628a579ecea3dc560ebd1110d1c /drivers/thermal/cpu_cooling.c | |
| parent | thermal: debug: add debug statement for core and step_wise (diff) | |
| download | linux-1c9573a40c1d34494419f32560f28c763c504d79.tar.xz linux-1c9573a40c1d34494419f32560f28c763c504d79.zip | |
thermal: fix cpu_cooling max_level behavior
As per Documentation/thermal/sysfs-api.txt, max_level
is an index, not a counter. Thus, in case a CPU has
3 valid frequencies, max_level is expected to be 2, for instance.
The current code makes max_level == number of valid frequencies,
which is bogus. This patch fix the cpu_cooling device by
ranging max_level properly.
Reported-by: Carlos Hernandez <ceh@ti.com>
Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Diffstat (limited to 'drivers/thermal/cpu_cooling.c')
| -rw-r--r-- | drivers/thermal/cpu_cooling.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/thermal/cpu_cooling.c b/drivers/thermal/cpu_cooling.c index 02a46f23d14c..cc556a8e2842 100644 --- a/drivers/thermal/cpu_cooling.c +++ b/drivers/thermal/cpu_cooling.c @@ -173,6 +173,8 @@ static int get_property(unsigned int cpu, unsigned long input, freq = table[i].frequency; max_level++; } + /* max_level is an index, not a counter */ + max_level--; /* get max level */ if (property == GET_MAXL) { @@ -181,7 +183,7 @@ static int get_property(unsigned int cpu, unsigned long input, } if (property == GET_FREQ) - level = descend ? input : (max_level - input - 1); + level = descend ? input : (max_level - input); for (i = 0, j = 0; table[i].frequency != CPUFREQ_TABLE_END; i++) { /* ignore invalid entry */ @@ -197,7 +199,7 @@ static int get_property(unsigned int cpu, unsigned long input, if (property == GET_LEVEL && (unsigned int)input == freq) { /* get level by frequency */ - *output = descend ? j : (max_level - j - 1); + *output = descend ? j : (max_level - j); return 0; } if (property == GET_FREQ && level == j) { |