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: Fabio Rossi <rossi.f@inwind.it>
Acked-by: Nick Kossifidis <mickflemm@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath5k/phy.c b/drivers/net/wireless/ath/ath5k/phy.c
index 9e2faae..b48b29d 100644
--- a/drivers/net/wireless/ath/ath5k/phy.c
+++ b/drivers/net/wireless/ath/ath5k/phy.c
@@ -1487,28 +1487,35 @@
{
s8 tmp;
s16 min_pwrL, min_pwrR;
- s16 pwr_i = pwrL[0];
+ s16 pwr_i;
- do {
- pwr_i--;
- tmp = (s8) ath5k_get_interpolated_value(pwr_i,
- pwrL[0], pwrL[1],
- stepL[0], stepL[1]);
+ 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);
- } while (tmp > 1);
+ min_pwrL = pwr_i;
+ }
- 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);
- 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;
+ min_pwrR = pwr_i;
+ }
/* Keep the right boundary so that it works for both curves */
return max(min_pwrL, min_pwrR);