[RFC PATCH 07/14] hotplug/PCI: use PCIe cap access functions to simplify implementation

[Jiang Liu <liuj97@xxxxxxxxx>]

From: Jiang Liu <jiang.liu@xxxxxxxxxx>

Use PCIe cap access functions to simplify pcihp_slot.c

Signed-off-by: Jiang Liu <liuj97@xxxxxxxxx>
---
 drivers/pci/hotplug/pcihp_slot.c |   17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/pci/hotplug/pcihp_slot.c b/drivers/pci/hotplug/pcihp_slot.c
index 8c05a18..08ca019 100644
--- a/drivers/pci/hotplug/pcihp_slot.c
+++ b/drivers/pci/hotplug/pcihp_slot.c
@@ -103,8 +103,7 @@ static void program_hpp_type2(struct pci_dev *dev, struct hpp_type2 *hpp)
 		return;
 
 	/* Find PCI Express capability */
-	pos = pci_pcie_cap(dev);
-	if (!pos)
+	if (!pci_is_pcie(dev))
 		return;
 
 	if (hpp->revision > 1) {
@@ -114,16 +113,18 @@ static void program_hpp_type2(struct pci_dev *dev, struct hpp_type2 *hpp)
 	}
 
 	/* Initialize Device Control Register */
-	pci_read_config_word(dev, pos + PCI_EXP_DEVCTL, &reg16);
+	if (pci_pcie_cap_read_word(dev, PCI_EXP_DEVCTL, &reg16))
+		return;
 	reg16 = (reg16 & hpp->pci_exp_devctl_and) | hpp->pci_exp_devctl_or;
-	pci_write_config_word(dev, pos + PCI_EXP_DEVCTL, reg16);
+	pci_pcie_cap_write_word(dev, PCI_EXP_DEVCTL, reg16);
 
 	/* Initialize Link Control Register */
 	if (dev->subordinate) {
-		pci_read_config_word(dev, pos + PCI_EXP_LNKCTL, &reg16);
-		reg16 = (reg16 & hpp->pci_exp_lnkctl_and)
-			| hpp->pci_exp_lnkctl_or;
-		pci_write_config_word(dev, pos + PCI_EXP_LNKCTL, reg16);
+		if (pci_pcie_cap_read_word(dev, PCI_EXP_LNKCTL, &reg16)) {
+			reg16 = (reg16 & hpp->pci_exp_lnkctl_and)
+				| hpp->pci_exp_lnkctl_or;
+			pci_pcie_cap_write_word(dev, PCI_EXP_LNKCTL, reg16);
+		}
 	}
 
 	/* Find Advanced Error Reporting Enhanced Capability */
-- 
1.7.9.5

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