et131x: Use PCI Express Capability accessors

Use PCI Express Capability access functions to simplify et131x driver.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

1 files changed, 5 insertions, 14 deletions

diff --git a/drivers/staging/et131x/et131x.c b/drivers/staging/et131x/et131x.c
index 029725c89e58..49553f88c7b3 100644
--- a/drivers/staging/et131x/et131x.c
+++ b/drivers/staging/et131x/et131x.c
@@ -3995,16 +3995,14 @@ static void et131x_hwaddr_init(struct et131x_adapter *adapter)
 static int et131x_pci_init(struct et131x_adapter *adapter,
                                                 struct pci_dev *pdev)
 {
-        int cap = pci_pcie_cap(pdev);
         u16 max_payload;
-        u16 ctl;
         int i, rc;
 
         rc = et131x_init_eeprom(adapter);
         if (rc < 0)
                 goto out;
 
-        if (!cap) {
+        if (!pci_is_pcie(pdev)) {
                 dev_err(&pdev->dev, "Missing PCIe capabilities\n");
                 goto err_out;
         }
@@ -4012,7 +4010,7 @@ static int et131x_pci_init(struct et131x_adapter *adapter,
         /* Let's set up the PORT LOGIC Register.  First we need to know what
          * the max_payload_size is
          */
-        if (pci_read_config_word(pdev, cap + PCI_EXP_DEVCAP, &max_payload)) {
+        if (pcie_capability_read_word(pdev, PCI_EXP_DEVCAP, &max_payload)) {
                 dev_err(&pdev->dev,
                     "Could not read PCI config space for Max Payload Size\n");
                 goto err_out;
@@ -4049,17 +4047,10 @@ static int et131x_pci_init(struct et131x_adapter *adapter,
         }
 
         /* Change the max read size to 2k */
-        if (pci_read_config_word(pdev, cap + PCI_EXP_DEVCTL, &ctl)) {
+        if (pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL,
+                                PCI_EXP_DEVCTL_READRQ, 0x4 << 12)) {
                 dev_err(&pdev->dev,
-                        "Could not read PCI config space for Max read size\n");
-                goto err_out;
-        }
-
-        ctl = (ctl & ~PCI_EXP_DEVCTL_READRQ) | (0x04 << 12);
-
-        if (pci_write_config_word(pdev, cap + PCI_EXP_DEVCTL, ctl)) {
-                dev_err(&pdev->dev,
-                      "Could not write PCI config space for Max read size\n");
+                        "Couldn't change PCI config space for Max read size\n");
                 goto err_out;
         }