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Commit 875690c3 authored by Fabio Rossi's avatar Fabio Rossi Committed by John W. Linville
Browse files

ath5k: fix interpolation with equal power levels 



When the EEPROM contains weird values for the power levels we have to
fix the interpolation process.

Signed-off-by: default avatarFabio Rossi <rossi.f@inwind.it>
Acked-by: default avatarNick Kossifidis <mickflemm@gmail.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent fbc9f97b

drivers/net/wireless/ath5k/phy.c

+28 −21
Original line number Diff line number Diff line
@@ -1487,28 +1487,35 @@ ath5k_get_linear_pcdac_min(const u8 *stepL, const u8 *stepR, 
{

	s8 tmp;

	s16 min_pwrL, min_pwrR;

	s16 pwr_i = pwrL[0];

	s16 pwr_i;



	if (pwrL[0] == pwrL[1])

		min_pwrL = pwrL[0];

	else {

		pwr_i = pwrL[0];

		do {

			pwr_i--;

			tmp = (s8) ath5k_get_interpolated_value(pwr_i,

							pwrL[0], pwrL[1],

							stepL[0], stepL[1]);



		} while (tmp > 1);



		min_pwrL = pwr_i;

	}



	if (pwrR[0] == pwrR[1])

		min_pwrR = pwrR[0];

	else {

		pwr_i = pwrR[0];

		do {

			pwr_i--;

			tmp = (s8) ath5k_get_interpolated_value(pwr_i,

							pwrR[0], pwrR[1],

							stepR[0], stepR[1]);



		} while (tmp > 1);



		min_pwrR = pwr_i;

	}



	/* Keep the right boundary so that it works for both curves */

	return max(min_pwrL, min_pwrR);