ath5k: do not re-run AGC calibration periodically - fixes stability issues on AR2315 (#10574)

SVN-Revision: 30624

package/mac80211/patches/441-ath5k_no_agc_recalibration.patch

@@ -0,0 +1,42 @@
+--- a/drivers/net/wireless/ath/ath5k/phy.c
++++ b/drivers/net/wireless/ath/ath5k/phy.c
+@@ -1871,31 +1871,15 @@ ath5k_hw_phy_calibrate(struct ath5k_hw *
+ 		ret = 0;
+ 	}
+ 
+-	/* On full calibration do an AGC calibration and
+-	 * request a PAPD probe for gainf calibration if
+-	 * needed */
+-	if (ah->ah_cal_mask & AR5K_CALIBRATION_FULL) {
++	/* On full calibration request a PAPD probe for
++	 * gainf calibration if needed */
++	if ((ah->ah_cal_mask & AR5K_CALIBRATION_FULL) &&
++	    (ah->ah_radio == AR5K_RF5111 ||
++	     ah->ah_radio == AR5K_RF5112) &&
++	    channel->hw_value != AR5K_MODE_11B)
++		ath5k_hw_request_rfgain_probe(ah);
+ 
+-		AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL,
+-					AR5K_PHY_AGCCTL_CAL);
+-
+-		ret = ath5k_hw_register_timeout(ah, AR5K_PHY_AGCCTL,
+-			AR5K_PHY_AGCCTL_CAL | AR5K_PHY_AGCCTL_NF,
+-			0, false);
+-		if (ret) {
+-			ATH5K_ERR(ah,
+-				"gain calibration timeout (%uMHz)\n",
+-				channel->center_freq);
+-		}
+-
+-		if ((ah->ah_radio == AR5K_RF5111 ||
+-			ah->ah_radio == AR5K_RF5112)
+-			&& (channel->hw_value != AR5K_MODE_11B))
+-			ath5k_hw_request_rfgain_probe(ah);
+-	}
+-
+-	/* Update noise floor
+-	 * XXX: Only do this after AGC calibration */
++	/* Update noise floor */
+ 	if (!(ah->ah_cal_mask & AR5K_CALIBRATION_NF))
+ 		ath5k_hw_update_noise_floor(ah);
+