bnx2x: remove unnecessary read of PCI_CAP_ID_EXP

The PCIE capability offset is saved during PCI bus walking.  It will
remove an unnecessary search in the PCI configuration space if this
value is referenced instead of reacquiring it.  Also, pci_is_pcie is a
better way of determining if the device is PCIE or not (as it uses the
same saved PCIE capability offset).
Signed-off-by: NJon Mason <jdmason@kudzu.us>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/bnx2x/bnx2x.h

@@ -1156,7 +1156,6 @@ struct bnx2x {
 #define NO_FCOE(bp)		((bp)->flags & NO_FCOE_FLAG)
 
 	int			pm_cap;
-	int			pcie_cap;
 	int			mrrs;
 
 	struct delayed_work	sp_task;

drivers/net/bnx2x/bnx2x_main.c

@@ -1222,7 +1222,7 @@ static inline u8 bnx2x_is_pcie_pending(struct pci_dev *dev)
 	int pos;
 	u16 status;
 
-	pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
+	pos = pci_pcie_cap(dev);
 	if (!pos)
 		return false;
 
@@ -5498,7 +5498,7 @@ static void bnx2x_init_pxp(struct bnx2x *bp)
 	int r_order, w_order;
 
 	pci_read_config_word(bp->pdev,
-			     bp->pcie_cap + PCI_EXP_DEVCTL, &devctl);
+			     bp->pdev->pcie_cap + PCI_EXP_DEVCTL, &devctl);
 	DP(NETIF_MSG_HW, "read 0x%x from devctl\n", devctl);
 	w_order = ((devctl & PCI_EXP_DEVCTL_PAYLOAD) >> 5);
 	if (bp->mrrs == -1)
@@ -9759,10 +9759,8 @@ static int __devinit bnx2x_init_dev(struct pci_dev *pdev,
 		goto err_out_release;
 	}
 
-	bp->pcie_cap = pci_find_capability(pdev, PCI_CAP_ID_EXP);
-	if (bp->pcie_cap == 0) {
-		dev_err(&bp->pdev->dev,
-			"Cannot find PCI Express capability, aborting\n");
+	if (!pci_is_pcie(pdev)) {
+		dev_err(&bp->pdev->dev,	"Not PCI Express, aborting\n");
 		rc = -EIO;
 		goto err_out_release;
 	}