On Thursday, May 15, 2014 10:47:40 AM Eduardo Valentin wrote:
> Hello Bartlomiej,

Hi,

> On Mon, May 05, 2014 at 01:15:34PM +0200, Bartlomiej Zolnierkiewicz wrote:
> > Remove runtime checks for pdata sanity from exynos_tmu_initialize().
> > The current values hardcoded in pdata will never trigger the checks
> > and for the new code potential mistakes should be caught during
> > development/review phases.
> > 
> > There should be no functional changes caused by this patch.
> > 
> > Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
> > ---
> >  drivers/thermal/samsung/exynos_thermal_common.h |  1 -
> >  drivers/thermal/samsung/exynos_tmu.c            | 13 -------------
> >  2 files changed, 14 deletions(-)
> > 
> > diff --git a/drivers/thermal/samsung/exynos_thermal_common.h 
> > b/drivers/thermal/samsung/exynos_thermal_common.h
> > index 3eb2ed9..cd44719 100644
> > --- a/drivers/thermal/samsung/exynos_thermal_common.h
> > +++ b/drivers/thermal/samsung/exynos_thermal_common.h
> > @@ -27,7 +27,6 @@
> >  #define SENSOR_NAME_LEN    16
> >  #define MAX_TRIP_COUNT     8
> >  #define MAX_COOLING_DEVICE 4
> > -#define MAX_THRESHOLD_LEVS 5
> >  
> >  #define ACTIVE_INTERVAL 500
> >  #define IDLE_INTERVAL 10000
> > diff --git a/drivers/thermal/samsung/exynos_tmu.c 
> > b/drivers/thermal/samsung/exynos_tmu.c
> > index 903566f..789d745 100644
> > --- a/drivers/thermal/samsung/exynos_tmu.c
> > +++ b/drivers/thermal/samsung/exynos_tmu.c
> > @@ -158,23 +158,10 @@ static int exynos_tmu_initialize(struct 
> > platform_device *pdev)
> >         data->temp_error > pdata->max_efuse_value)
> >             data->temp_error = pdata->efuse_value & EXYNOS_TMU_TEMP_MASK;
> >  
> > -   if (pdata->max_trigger_level > MAX_THRESHOLD_LEVS) {
> > -           dev_err(&pdev->dev, "Invalid max trigger level\n");
> > -           ret = -EINVAL;
> > -           goto out;
> > -   }
> > -
> >     for (i = 0; i < pdata->max_trigger_level; i++) {
> >             if (!pdata->trigger_levels[i])
> >                     continue;
> >  
> > -           if ((pdata->trigger_type[i] == HW_TRIP) &&
> > -           (!pdata->trigger_levels[pdata->max_trigger_level - 1])) {
> > -                   dev_err(&pdev->dev, "Invalid hw trigger level\n");
> > -                   ret = -EINVAL;
> > -                   goto out;
> > -           }
> > -
> 
> Does it mean no new pdata are going to be written? i.e., no new soc is
> going to be supported by this driver that needs proper pdata checking?

This is not a proper checking.  The checks in question are done at runtime
in a production code for data that is hardcoded inside driver during
development time and later it doesn't change.  Such data should be verified
during development and review time (i.e. by a script parsing relevant data
from exynos_tmu_data.c, one can also argue that verification to be done is
so simple that the review by a maintainer should be enough).

> >             /* Count trigger levels except the HW trip*/
> >             if (!(pdata->trigger_type[i] == HW_TRIP))
> >                     trigger_levs++;

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

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