drm/radeon: Use PCI Express Capability accessors

Use PCI Express Capability access functions to simplify radeon driver.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index e585a3b..b106c56 100644 (file)
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -77,13 +77,9 @@ void evergreen_tiling_fields(unsigned tiling_flags, unsigned *bankw,
 void evergreen_fix_pci_max_read_req_size(struct radeon_device *rdev)
 {
        u16 ctl, v;
-       int cap, err;
+       int err;
 
-       cap = pci_pcie_cap(rdev->pdev);
-       if (!cap)
-               return;
-
-       err = pci_read_config_word(rdev->pdev, cap + PCI_EXP_DEVCTL, &ctl);
+       err = pcie_capability_read_word(rdev->pdev, PCI_EXP_DEVCTL, &ctl);
        if (err)
                return;
 
@@ -95,7 +91,7 @@ void evergreen_fix_pci_max_read_req_size(struct radeon_device *rdev)
        if ((v == 0) || (v == 6) || (v == 7)) {
                ctl &= ~PCI_EXP_DEVCTL_READRQ;
                ctl |= (2 << 12);
-               pci_write_config_word(rdev->pdev, cap + PCI_EXP_DEVCTL, ctl);
+               pcie_capability_write_word(rdev->pdev, PCI_EXP_DEVCTL, ctl);
        }
 }