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ath9k: avoid accessing MRC registers on single-chain devices 

They are not implemented, and accessing them might trigger errors

Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau 2013-08-13 12:33:28 +02:00 committed by John W. Linville
parent ca6d4a74c4
commit a1c781bb20
1 changed files with 4 additions and 0 deletions
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4
drivers/net/wireless/ath/ath9k/ar9003_phy.c
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@ -1172,6 +1172,10 @@ static bool ar9003_hw_ani_control(struct ath_hw *ah,
* is_on == 0 means MRC CCK is OFF (more noise imm)
*/
bool is_on = param ? 1 : 0;
if (ah->caps.rx_chainmask == 1)
break;
REG_RMW_FIELD(ah, AR_PHY_MRC_CCK_CTRL,
AR_PHY_MRC_CCK_ENABLE, is_on);
REG_RMW_FIELD(ah, AR_PHY_MRC_CCK_CTRL,