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mtip32xx: prefer pcie_capability_read_word()

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Replace pci_read_config_word() with pcie_capability_read_word().

pcie_capability_read_word() takes care of a few special cases when reading
the PCIe capability.  See 8c0d3a02c1 ("PCI: Add accessors for PCI Express
Capability").

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Bjorn Helgaas 2021-01-26 14:04:33 -06:00 committed by Jens Axboe
parent 416c054777
commit 2126979183
1 changed files with 3 additions and 8 deletions
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11
drivers/block/mtip32xx/mtip32xx.c
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@ -3924,14 +3924,10 @@ static DEFINE_HANDLER(7);
static void mtip_disable_link_opts(struct driver_data *dd, struct pci_dev *pdev)
{
int pos;
unsigned short pcie_dev_ctrl;
pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
if (pos) {
pci_read_config_word(pdev,
pos + PCI_EXP_DEVCTL,
&pcie_dev_ctrl);
if (pci_is_pcie(pdev)) {
pcie_capability_read_word(pdev, PCI_EXP_DEVCTL, &pcie_dev_ctrl);
if (pcie_dev_ctrl & PCI_EXP_DEVCTL_NOSNOOP_EN ||
pcie_dev_ctrl & PCI_EXP_DEVCTL_RELAX_EN) {
dev_info(&dd->pdev->dev,
@ -3939,8 +3935,7 @@ static void mtip_disable_link_opts(struct driver_data *dd, struct pci_dev *pdev)
pdev->vendor, pdev->device);
pcie_dev_ctrl &= ~(PCI_EXP_DEVCTL_NOSNOOP_EN |
PCI_EXP_DEVCTL_RELAX_EN);
pci_write_config_word(pdev,
pos + PCI_EXP_DEVCTL,
pcie_capability_write_word(pdev, PCI_EXP_DEVCTL,
pcie_dev_ctrl);
}
}