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Re: [PATCH] rt2800: validate step value for temperature compensation

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On Thu, Oct 25, 2012 at 9:51 AM, Stanislaw Gruszka <sgruszka@xxxxxxxxxx> wrote:
> Some hardware has correct (!= 0xff) value of tssi_bounds[4] in the
> EEPROM, but step is equal to 0xff. This results on ridiculous delta
> calculations and completely broke TX power settings.
>
> Reported-and-tested-by: Pavel Lucik <pavel.lucik@xxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Stanislaw Gruszka <sgruszka@xxxxxxxxxx>

Acked-by: Ivo van Doorn <IvDoorn@xxxxxxxxx>

> ---
>  drivers/net/wireless/rt2x00/rt2800lib.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c
> index 3bc206d..c0441a7 100644
> --- a/drivers/net/wireless/rt2x00/rt2800lib.c
> +++ b/drivers/net/wireless/rt2x00/rt2800lib.c
> @@ -2449,7 +2449,7 @@ static int rt2800_get_gain_calibration_delta(struct rt2x00_dev *rt2x00dev)
>         /*
>          * Check if temperature compensation is supported.
>          */
> -       if (tssi_bounds[4] == 0xff)
> +       if (tssi_bounds[4] == 0xff || step == 0xff)
>                 return 0;
>
>         /*
> --
> 1.7.1
>
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