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Commit 365d2ebc authored Sep 26, 2012 by Sujith Manoharan Committed by John W. Linville Sep 28, 2012

ath9k: Fix chainmask selection for AR9462



Force chain 1 to be used for CCK rates since the target power
table stored in EEPROM is too high to transmit with both chains.
This is needed to avoid regulatory violation.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

parent 8b4509f6

drivers/net/wireless/ath/ath9k/ath9k.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -173,6 +173,8 @@ void ath_descdma_cleanup(struct ath_softc sc, struct ath_descdma dd,

		#define ATH_AN_2_TID(_an, _tidno) (&(_an)->tid[(_tidno)])

		#define IS_CCK_RATE(rate) ((rate >= 0x18) && (rate <= 0x1e))

		#define ATH_TX_COMPLETE_POLL_INT 1000

		enum ATH_AGGR_STATUS {

drivers/net/wireless/ath/ath9k/xmit.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -1820,10 +1820,14 @@ u8 ath_txchainmask_reduction(struct ath_softc *sc, u8 chainmask, u32 rate)
		{
		struct ath_hw *ah = sc->sc_ah;
		struct ath9k_channel *curchan = ah->curchan;

		if ((ah->caps.hw_caps & ATH9K_HW_CAP_APM) &&
		(curchan->channelFlags & CHANNEL_5GHZ) &&
		(chainmask == 0x7) && (rate < 0x90))
		return 0x3;
		else if (AR_SREV_9462(ah) && ath9k_hw_btcoex_is_enabled(ah) &&
		IS_CCK_RATE(rate))
		return 0x2;
		else
		return chainmask;
		}