diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c
index 8be3c3c8c68b810b03b80cc0077638b66cfea86d..6fc69c42f36e62310b0f8c53a606b95fc7cba248 100644
--- a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c
@@ -1085,34 +1085,44 @@ bool iwl_pcie_check_hw_rf_kill(struct iwl_trans *trans)
 }
 
 struct iwl_causes_list {
-	u32 cause_num;
-	u32 mask_reg;
+	u16 mask_reg;
+	u8 bit;
 	u8 addr;
 };
 
+#define CAUSE(reg, mask)						\
+	{								\
+		.mask_reg = reg,					\
+		.bit = ilog2(mask),					\
+		.addr = ilog2(mask) +					\
+			((reg) == CSR_MSIX_FH_INT_MASK_AD ? -16 :	\
+			 (reg) == CSR_MSIX_HW_INT_MASK_AD ? 16 :	\
+			 0xffff),	/* causes overflow warning */	\
+	}
+
 static const struct iwl_causes_list causes_list_common[] = {
-	{MSIX_FH_INT_CAUSES_D2S_CH0_NUM,	CSR_MSIX_FH_INT_MASK_AD, 0},
-	{MSIX_FH_INT_CAUSES_D2S_CH1_NUM,	CSR_MSIX_FH_INT_MASK_AD, 0x1},
-	{MSIX_FH_INT_CAUSES_S2D,		CSR_MSIX_FH_INT_MASK_AD, 0x3},
-	{MSIX_FH_INT_CAUSES_FH_ERR,		CSR_MSIX_FH_INT_MASK_AD, 0x5},
-	{MSIX_HW_INT_CAUSES_REG_ALIVE,		CSR_MSIX_HW_INT_MASK_AD, 0x10},
-	{MSIX_HW_INT_CAUSES_REG_WAKEUP,		CSR_MSIX_HW_INT_MASK_AD, 0x11},
-	{MSIX_HW_INT_CAUSES_REG_RESET_DONE,	CSR_MSIX_HW_INT_MASK_AD, 0x12},
-	{MSIX_HW_INT_CAUSES_REG_CT_KILL,	CSR_MSIX_HW_INT_MASK_AD, 0x16},
-	{MSIX_HW_INT_CAUSES_REG_RF_KILL,	CSR_MSIX_HW_INT_MASK_AD, 0x17},
-	{MSIX_HW_INT_CAUSES_REG_PERIODIC,	CSR_MSIX_HW_INT_MASK_AD, 0x18},
-	{MSIX_HW_INT_CAUSES_REG_SCD,		CSR_MSIX_HW_INT_MASK_AD, 0x2A},
-	{MSIX_HW_INT_CAUSES_REG_FH_TX,		CSR_MSIX_HW_INT_MASK_AD, 0x2B},
-	{MSIX_HW_INT_CAUSES_REG_HW_ERR,		CSR_MSIX_HW_INT_MASK_AD, 0x2D},
-	{MSIX_HW_INT_CAUSES_REG_HAP,		CSR_MSIX_HW_INT_MASK_AD, 0x2E},
+	CAUSE(CSR_MSIX_FH_INT_MASK_AD, MSIX_FH_INT_CAUSES_D2S_CH0_NUM),
+	CAUSE(CSR_MSIX_FH_INT_MASK_AD, MSIX_FH_INT_CAUSES_D2S_CH1_NUM),
+	CAUSE(CSR_MSIX_FH_INT_MASK_AD, MSIX_FH_INT_CAUSES_S2D),
+	CAUSE(CSR_MSIX_FH_INT_MASK_AD, MSIX_FH_INT_CAUSES_FH_ERR),
+	CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_ALIVE),
+	CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_WAKEUP),
+	CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_RESET_DONE),
+	CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_CT_KILL),
+	CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_RF_KILL),
+	CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_PERIODIC),
+	CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_SCD),
+	CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_FH_TX),
+	CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_HW_ERR),
+	CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_HAP),
 };
 
 static const struct iwl_causes_list causes_list_pre_bz[] = {
-	{MSIX_HW_INT_CAUSES_REG_SW_ERR,		CSR_MSIX_HW_INT_MASK_AD, 0x29},
+	CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_SW_ERR),
 };
 
 static const struct iwl_causes_list causes_list_bz[] = {
-	{MSIX_HW_INT_CAUSES_REG_SW_ERR_BZ,	CSR_MSIX_HW_INT_MASK_AD, 0x15},
+	CAUSE(CSR_MSIX_HW_INT_MASK_AD, MSIX_HW_INT_CAUSES_REG_SW_ERR_BZ),
 };
 
 static void iwl_pcie_map_list(struct iwl_trans *trans,
@@ -1124,7 +1134,7 @@ static void iwl_pcie_map_list(struct iwl_trans *trans,
 	for (i = 0; i < arr_size; i++) {
 		iwl_write8(trans, CSR_MSIX_IVAR(causes[i].addr), val);
 		iwl_clear_bit(trans, causes[i].mask_reg,
-			      causes[i].cause_num);
+			      BIT(causes[i].bit));
 	}
 }