Hello Sujith Manoharan, The patch 6fcbe538be43: "ath9k: Fix issue with MCS15" from Nov 14, 2013, leads to the following static checker warning: drivers/net/wireless/ath/ath9k/ar9003_phy.c:836 ar9003_doubler_fix() warn: 'ah->hw_version.macVersion == 448' 'false' implies 'ah->hw_version.macVersion == 448' is 'false' drivers/net/wireless/ath/ath9k/ar9003_phy.c 834 static void ar9003_doubler_fix(struct ath_hw *ah) 835 { 836 if (AR_SREV_9300(ah) || AR_SREV_9580(ah) || AR_SREV_9550(ah)) { The problem is that both AR_SREV_VERSION_9300 and AR_SREV_VERSION_9580 are 0x1c0 so the test for AR_SREV_9580() is duplicative. 837 REG_RMW(ah, AR_PHY_65NM_CH0_RXTX2, 838 1 << AR_PHY_65NM_CH0_RXTX2_SYNTHON_MASK_S | 839 1 << AR_PHY_65NM_CH0_RXTX2_SYNTHOVR_MASK_S, 0); 840 REG_RMW(ah, AR_PHY_65NM_CH1_RXTX2, 841 1 << AR_PHY_65NM_CH0_RXTX2_SYNTHON_MASK_S | 842 1 << AR_PHY_65NM_CH0_RXTX2_SYNTHOVR_MASK_S, 0); 843 REG_RMW(ah, AR_PHY_65NM_CH2_RXTX2, 844 1 << AR_PHY_65NM_CH0_RXTX2_SYNTHON_MASK_S | 845 1 << AR_PHY_65NM_CH0_RXTX2_SYNTHOVR_MASK_S, 0); 846 847 udelay(200); 848 regards, dan carpenter