PCI/pciehp: Use PCI Express Capability accessors

Use PCI Express Capability access functions to simplify pciehp.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>

diff --git a/drivers/pci/hotplug/pciehp_acpi.c b/drivers/pci/hotplug/pciehp_acpi.c
index 376d70d..24d709b 100644 (file)
--- a/drivers/pci/hotplug/pciehp_acpi.c
+++ b/drivers/pci/hotplug/pciehp_acpi.c
@@ -81,16 +81,12 @@ static struct list_head __initdata dummy_slots = LIST_HEAD_INIT(dummy_slots);
 /* Dummy driver for dumplicate name detection */
 static int __init dummy_probe(struct pcie_device *dev)
 {
-       int pos;
        u32 slot_cap;
        acpi_handle handle;
        struct dummy_slot *slot, *tmp;
        struct pci_dev *pdev = dev->port;
 
-       pos = pci_pcie_cap(pdev);
-       if (!pos)
-               return -ENODEV;
-       pci_read_config_dword(pdev, pos + PCI_EXP_SLTCAP, &slot_cap);
+       pcie_capability_read_dword(pdev, PCI_EXP_SLTCAP, &slot_cap);
        slot = kzalloc(sizeof(*slot), GFP_KERNEL);
        if (!slot)
                return -ENOMEM;

diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index 302451e..13b2eaf 100644 (file)
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -44,25 +44,25 @@
 static inline int pciehp_readw(struct controller *ctrl, int reg, u16 *value)
 {
        struct pci_dev *dev = ctrl->pcie->port;
-       return pci_read_config_word(dev, pci_pcie_cap(dev) + reg, value);
+       return pcie_capability_read_word(dev, reg, value);
 }
 
 static inline int pciehp_readl(struct controller *ctrl, int reg, u32 *value)
 {
        struct pci_dev *dev = ctrl->pcie->port;
-       return pci_read_config_dword(dev, pci_pcie_cap(dev) + reg, value);
+       return pcie_capability_read_dword(dev, reg, value);
 }
 
 static inline int pciehp_writew(struct controller *ctrl, int reg, u16 value)
 {
        struct pci_dev *dev = ctrl->pcie->port;
-       return pci_write_config_word(dev, pci_pcie_cap(dev) + reg, value);
+       return pcie_capability_write_word(dev, reg, value);
 }
 
 static inline int pciehp_writel(struct controller *ctrl, int reg, u32 value)
 {
        struct pci_dev *dev = ctrl->pcie->port;
-       return pci_write_config_dword(dev, pci_pcie_cap(dev) + reg, value);
+       return pcie_capability_write_dword(dev, reg, value);
 }
 
 /* Power Control Command */
@@ -855,10 +855,6 @@ struct controller *pcie_init(struct pcie_device *dev)
                goto abort;
        }
        ctrl->pcie = dev;
-       if (!pci_pcie_cap(pdev)) {
-               ctrl_err(ctrl, "Cannot find PCI Express capability\n");
-               goto abort_ctrl;
-       }
        if (pciehp_readl(ctrl, PCI_EXP_SLTCAP, &slot_cap)) {
                ctrl_err(ctrl, "Cannot read SLOTCAP register\n");
                goto abort_ctrl;