bna: Minor IRQ Index and Definition Change

Change details:
 - Always set mbox irq index to zero and make corresponding changes in mbox
   irq alloc/sync function and txrx irq index calculation. Add definition of
   BNAD_INTX_TX_IB_BITMASK & BNAD_INTX_RX_IB_BITMASK and update
   bnad_txrx_irq_alloc accordingly.
Signed-off-by: NRasesh Mody <rmody@brocade.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/bna/bnad.c

@@ -60,7 +60,7 @@ static const u8 bnad_bcast_addr[] =  {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 
 #define BNAD_GET_MBOX_IRQ(_bnad)				\
 	(((_bnad)->cfg_flags & BNAD_CF_MSIX) ?			\
-	 ((_bnad)->msix_table[(_bnad)->msix_num - 1].vector) :	\
+	 ((_bnad)->msix_table[BNAD_MAILBOX_MSIX_INDEX].vector) : \
 	 ((_bnad)->pcidev->irq))
 
 #define BNAD_FILL_UNMAPQ_MEM_REQ(_res_info, _num, _depth)	\
@@ -1116,17 +1116,17 @@ bnad_mbox_irq_alloc(struct bnad *bnad,
 	spin_lock_irqsave(&bnad->bna_lock, flags);
 	if (bnad->cfg_flags & BNAD_CF_MSIX) {
 		irq_handler = (irq_handler_t)bnad_msix_mbox_handler;
-		irq = bnad->msix_table[bnad->msix_num - 1].vector;
+		irq = bnad->msix_table[BNAD_MAILBOX_MSIX_INDEX].vector;
 		irq_flags = 0;
 		intr_info->intr_type = BNA_INTR_T_MSIX;
-		intr_info->idl[0].vector = bnad->msix_num - 1;
+		intr_info->idl[0].vector = BNAD_MAILBOX_MSIX_INDEX;
 	} else {
 		irq_handler = (irq_handler_t)bnad_isr;
 		irq = bnad->pcidev->irq;
 		irq_flags = IRQF_SHARED;
 		intr_info->intr_type = BNA_INTR_T_INTX;
-		/* intr_info->idl.vector = 0 ? */
 	}
+
 	spin_unlock_irqrestore(&bnad->bna_lock, flags);
 	sprintf(bnad->mbox_irq_name, "%s", BNAD_NAME);
 
@@ -1179,11 +1179,12 @@ bnad_txrx_irq_alloc(struct bnad *bnad, enum bnad_intr_source src,
 
 		switch (src) {
 		case BNAD_INTR_TX:
-			vector_start = txrx_id;
+			vector_start = BNAD_MAILBOX_MSIX_VECTORS + txrx_id;
 			break;
 
 		case BNAD_INTR_RX:
-			vector_start = bnad->num_tx * bnad->num_txq_per_tx +
+			vector_start = BNAD_MAILBOX_MSIX_VECTORS +
+					(bnad->num_tx * bnad->num_txq_per_tx) +
 					txrx_id;
 			break;
 
@@ -1204,11 +1205,11 @@ bnad_txrx_irq_alloc(struct bnad *bnad, enum bnad_intr_source src,
 
 		switch (src) {
 		case BNAD_INTR_TX:
-			intr_info->idl[0].vector = 0x1; /* Bit mask : Tx IB */
+			intr_info->idl[0].vector = BNAD_INTX_TX_IB_BITMASK;
 			break;
 
 		case BNAD_INTR_RX:
-			intr_info->idl[0].vector = 0x2; /* Bit mask : Rx IB */
+			intr_info->idl[0].vector = BNAD_INTX_RX_IB_BITMASK;
 			break;
 		}
 	}
@@ -2075,7 +2076,7 @@ bnad_mbox_irq_sync(struct bnad *bnad)
 
 	spin_lock_irqsave(&bnad->bna_lock, flags);
 	if (bnad->cfg_flags & BNAD_CF_MSIX)
-		irq = bnad->msix_table[bnad->msix_num - 1].vector;
+		irq = bnad->msix_table[BNAD_MAILBOX_MSIX_INDEX].vector;
 	else
 		irq = bnad->pcidev->irq;
 	spin_unlock_irqrestore(&bnad->bna_lock, flags);

drivers/net/bna/bnad.h

@@ -68,7 +68,10 @@ struct bnad_rx_ctrl {
 
 #define BNAD_VERSION			"2.3.2.3"
 
+#define BNAD_MAILBOX_MSIX_INDEX		0
 #define BNAD_MAILBOX_MSIX_VECTORS	1
+#define BNAD_INTX_TX_IB_BITMASK		0x1
+#define BNAD_INTX_RX_IB_BITMASK		0x2
 
 #define BNAD_STATS_TIMER_FREQ		1000	/* in msecs */
 #define BNAD_DIM_TIMER_FREQ		1000	/* in msecs */