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niu: Use PCI Express Capability accessors 

Use PCI Express Capability access functions to simplify niu driver.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Jiang Liu 2012-07-24 17:20:21 +08:00 committed by Bjorn Helgaas
parent fadd1daa0b
commit 56cda12986
1 changed files with 7 additions and 12 deletions
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17
drivers/net/ethernet/sun/niu.c
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@ -9762,9 +9762,8 @@ static int __devinit niu_pci_init_one(struct pci_dev *pdev,
union niu_parent_id parent_id;
struct net_device *dev;
struct niu *np;
int err, pos;
int err;
u64 dma_mask;
u16 val16;
niu_driver_version();
@ -9787,8 +9786,7 @@ static int __devinit niu_pci_init_one(struct pci_dev *pdev,
goto err_out_disable_pdev;
}
pos = pci_pcie_cap(pdev);
if (pos <= 0) {
if (!pci_is_pcie(pdev)) {
dev_err(&pdev->dev, "Cannot find PCI Express capability, aborting\n");
goto err_out_free_res;
}
@ -9813,14 +9811,11 @@ static int __devinit niu_pci_init_one(struct pci_dev *pdev,
goto err_out_free_dev;
}
pci_read_config_word(pdev, pos + PCI_EXP_DEVCTL, &val16);
val16 &= ~PCI_EXP_DEVCTL_NOSNOOP_EN;
val16 |= (PCI_EXP_DEVCTL_CERE |
PCI_EXP_DEVCTL_NFERE |
PCI_EXP_DEVCTL_FERE |
PCI_EXP_DEVCTL_URRE |
pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL,
PCI_EXP_DEVCTL_NOSNOOP_EN,
PCI_EXP_DEVCTL_CERE | PCI_EXP_DEVCTL_NFERE |
PCI_EXP_DEVCTL_FERE | PCI_EXP_DEVCTL_URRE |
PCI_EXP_DEVCTL_RELAX_EN);
pci_write_config_word(pdev, pos + PCI_EXP_DEVCTL, val16);
dma_mask = DMA_BIT_MASK(44);
err = pci_set_dma_mask(pdev, dma_mask);