On Wed, 2014-09-24 at 10:27 +0200, Lukasz Majewski wrote:
> It turns out that some boards can have instance->lower greater than 0 and
> when thermal trend is dropping it results with next_target equal to -1.
>
> Since the next_target is defined as unsigned long it is interpreted as
> 0xFFFFFFFF and larger than instance->upper.
> As a result the next_target is set to instance->upper which ramps up to
> maximal cooling device target when the temperature is steadily decreasing.
>
> Signed-off-by: Lukasz Majewski <l.majew...@samsung.com>
applied.
thanks,
rui
> ---
> drivers/thermal/step_wise.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/thermal/step_wise.c b/drivers/thermal/step_wise.c
> index 3b54c2c..fdd1f52 100644
> --- a/drivers/thermal/step_wise.c
> +++ b/drivers/thermal/step_wise.c
> @@ -77,7 +77,7 @@ static unsigned long get_target_state(struct
> thermal_instance *instance,
> next_target = instance->upper;
> break;
> case THERMAL_TREND_DROPPING:
> - if (cur_state == instance->lower) {
> + if (cur_state <= instance->lower) {
> if (!throttle)
> next_target = THERMAL_NO_TARGET;
> } else {
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
