[PATCH 1/7] scsi/bfa: use pcie_capability_xxx to simplify code

[Yijing Wang <wangyijing@huawei.com>]

Pcie_capability_xxx() interfaces were introudced to
simplify code to access PCIe Cap config space. And
because PCI core saves the PCIe Cap offset in
set_pcie_port_type() when device is enumerated.
So we can use pci_is_pcie() instead.

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Cc: Jiang Liu <jiang.liu@huawei.com>
Cc: Anil Gurumurthy <agurumur@brocade.com>
Cc: Vijaya Mohan Guvva <vmohan@brocade.com>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Cc: linux-scsi@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
---
 drivers/scsi/bfa/bfad.c |    9 +++------
 1 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/scsi/bfa/bfad.c b/drivers/scsi/bfa/bfad.c
index 9611195..d726b81 100644
--- a/drivers/scsi/bfa/bfad.c
+++ b/drivers/scsi/bfa/bfad.c
@@ -767,7 +767,6 @@ bfad_pci_init(struct pci_dev *pdev, struct bfad_s *bfad)
 
 	/* Adjust PCIe Maximum Read Request Size */
 	if (pcie_max_read_reqsz > 0) {
-		int pcie_cap_reg;
 		u16 pcie_dev_ctl;
 		u16 mask = 0xffff;
 
@@ -794,10 +793,8 @@ bfad_pci_init(struct pci_dev *pdev, struct bfad_s *bfad)
 			break;
 		}
 
-		pcie_cap_reg = pci_find_capability(pdev, PCI_CAP_ID_EXP);
-		if (mask != 0xffff && pcie_cap_reg) {
-			pcie_cap_reg += 0x08;
-			pci_read_config_word(pdev, pcie_cap_reg, &pcie_dev_ctl);
+		if (mask != 0xffff && pci_is_pcie(pdev)) {
+			pcie_capability_read_word(pdev, PCI_EXP_DEVCTL, &pcie_dev_ctl);
 			if ((pcie_dev_ctl & 0x7000) != mask) {
 				printk(KERN_WARNING "BFA[%s]: "
 				"pcie_max_read_request_size is %d, "
@@ -806,7 +803,7 @@ bfad_pci_init(struct pci_dev *pdev, struct bfad_s *bfad)
 				pcie_max_read_reqsz);
 
 				pcie_dev_ctl &= ~0x7000;
-				pci_write_config_word(pdev, pcie_cap_reg,
+				pcie_capability_write_word(pdev, PCI_EXP_DEVCTL,
 						pcie_dev_ctl | mask);
 			}
 		}
-- 
1.7.1