On Thu, Dec 02, 2010 at 03:39:49PM -0800, Matteo Croce wrote:
> The ath9k driver subtracts 3 dBm to the txpower as with two radios the
> signal power is doubled.
> The resulting value is assigned in an u16 which overflows and makes
> the card work at full power.
Sorry can you also add:
Cc: stable@xxxxxxxxxx
Right above your Signed-off-by, this is a regulatory fix,
thanks.
Luis
>
> Signed-off-by: Matteo Croce <matteo@xxxxxxxxxxx>
>
> --- a/drivers/net/wireless/ath/ath9k/eeprom_def.c 2010-12-02
> 22:39:58.982020001 +0100
> +++ b/drivers/net/wireless/ath/ath9k/eeprom_def.c 2010-12-03
> 00:36:23.637799002 +0100
> @@ -1065,15 +1065,19 @@
> case 1:
> break;
> case 2:
> - scaledPower -= REDUCE_SCALED_POWER_BY_TWO_CHAIN;
> + if (scaledPower > REDUCE_SCALED_POWER_BY_TWO_CHAIN)
> + scaledPower -= REDUCE_SCALED_POWER_BY_TWO_CHAIN;
> + else
> + scaledPower = 0;
> break;
> case 3:
> - scaledPower -= REDUCE_SCALED_POWER_BY_THREE_CHAIN;
> + if (scaledPower > REDUCE_SCALED_POWER_BY_THREE_CHAIN)
> + scaledPower -= REDUCE_SCALED_POWER_BY_THREE_CHAIN;
> + else
> + scaledPower = 0;
> break;
> }
>
> - scaledPower = max((u16)0, scaledPower);
> -
> if (IS_CHAN_2GHZ(chan)) {
> numCtlModes = ARRAY_SIZE(ctlModesFor11g) -
> SUB_NUM_CTL_MODES_AT_2G_40;
> _______________________________________________
> ath9k-devel mailing list
> ath9k-devel@xxxxxxxxxxxxxxx
> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
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