This patch temporarily fixes a regression introduced by BT coexistence support.
There is an instability in connection when BT coexistence is enabled on some 
h/w.
This interim fix introduces a module parameter for BT coexistence configuration.

Signed-off-by: Vasanthakumar Thiagarajan <[email protected]>
---
 drivers/net/wireless/ath9k/hw.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/drivers/net/wireless/ath9k/hw.c b/drivers/net/wireless/ath9k/hw.c
index cbd408f..6800e5c 100644
--- a/drivers/net/wireless/ath9k/hw.c
+++ b/drivers/net/wireless/ath9k/hw.c
@@ -23,6 +23,10 @@
 #include "phy.h"
 #include "initvals.h"
 
+static int btcoex_enable;
+module_param(btcoex_enable, bool, 0);
+MODULE_PARM_DESC(btcoex_enable, "Enable Bluetooth coexistence support");
+
 #define ATH9K_CLOCK_RATE_CCK           22
 #define ATH9K_CLOCK_RATE_5GHZ_OFDM     40
 #define ATH9K_CLOCK_RATE_2GHZ_OFDM     44
@@ -3359,7 +3363,7 @@ bool ath9k_hw_fill_cap_info(struct ath_hal *ah)
        pCap->num_antcfg_2ghz =
                ath9k_hw_get_num_ant_config(ah, ATH9K_HAL_FREQ_BAND_2GHZ);
 
-       if (AR_SREV_9280_10_OR_LATER(ah)) {
+       if (AR_SREV_9280_10_OR_LATER(ah) && btcoex_enable) {
                pCap->hw_caps |= ATH9K_HW_CAP_BT_COEX;
                ah->ah_btactive_gpio = 6;
                ah->ah_wlanactive_gpio = 5;
-- 
1.5.5.1

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