linux-kernel - RE: [PATCH 1/1] thermal: consider emul

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Date:	Thu, 13 Jun 2013 04:54:01 +0000
From:	"R, Durgadoss" <durgadoss.r@...el.com>
To:	Eduardo Valentin <eduardo.valentin@...com>,
	"Zhang, Rui" <rui.zhang@...el.com>
CC:	Amit Daniel Kachhap <amit.daniel@...sung.com>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/1] thermal: consider emul_temperature while computing
 trend

> -----Original Message-----
> From: linux-pm-owner@...r.kernel.org [mailto:linux-pm-
> owner@...r.kernel.org] On Behalf Of Eduardo Valentin
> Sent: Thursday, May 30, 2013 3:07 AM
> To: Zhang, Rui
> Cc: Eduardo Valentin; Amit Daniel Kachhap; R, Durgadoss; linux-
> pm@...r.kernel.org; linux-kernel@...r.kernel.org
> Subject: [PATCH 1/1] thermal: consider emul_temperature while computing
> trend
> 
> In case emulated temperature is in use, using the trend
> provided by driver layer can lead to bogus situation.
> In this case, debugger user would set a temperature value,
> but the trend would be from driver computation.
> 
> To avoid this situation, this patch changes the get_tz_trend()
> to consider the emulated temperature whenever that is in use.

Nice catch.
Sorry, I missed looking at it earlier. Just got woken up by Rui's reply
on this. The patch looks fine to me.

Thanks,
Durga
> 
> Cc: Zhang Rui <rui.zhang@...el.com>
> Cc: Amit Daniel Kachhap <amit.daniel@...sung.com>
> Cc: Durgadoss R <durgadoss.r@...el.com>
> Cc: linux-pm@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Signed-off-by: Eduardo Valentin <eduardo.valentin@...com>
> ---
>  drivers/thermal/thermal_core.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/thermal/thermal_core.c
> b/drivers/thermal/thermal_core.c
> index d755440..c00dc92 100644
> --- a/drivers/thermal/thermal_core.c
> +++ b/drivers/thermal/thermal_core.c
> @@ -155,7 +155,8 @@ int get_tz_trend(struct thermal_zone_device *tz, int
> trip)
>  {
>  	enum thermal_trend trend;
> 
> -	if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend)) {
> +	if (tz->emul_temperature || !tz->ops->get_trend ||
> +	    tz->ops->get_trend(tz, trip, &trend)) {
>  		if (tz->temperature > tz->last_temperature)
>  			trend = THERMAL_TREND_RAISING;
>  		else if (tz->temperature < tz->last_temperature)
> --
> 1.8.2.1.342.gfa7285d
> 
> --
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