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IB/qib: Clean up unnecessary MSI/MSI-X capability find

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PCI core will initialize device MSI/MSI-X capability in
pci_msi_init_pci_dev().  So device drivers should use
pci_dev->msi_cap/msix_cap to determine whether a device supports
MSI/MSI-X instead of using pci_find_capability(pci_dev,
PCI_CAP_ID_MSI/MSIX).  Access to PCIe device config space again will
consume more time.

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Acked-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Yijing Wang 2013-08-08 21:11:56 +08:00 committed by Roland Dreier
parent bea25e82c6
commit b29b076394
1 changed files with 5 additions and 5 deletions
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10
drivers/infiniband/hw/qib/qib_pcie.c
View file

@ -283,12 +283,12 @@ int qib_pcie_params(struct qib_devdata *dd, u32 minw, u32 *nent,
goto bail;
}
pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_MSIX);
pos = dd->pcidev->msix_cap;
if (nent && *nent && pos) {
qib_msix_setup(dd, pos, nent, entry);
ret = 0; /* did it, either MSIx or INTx */
} else {
pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_MSI);
pos = dd->pcidev->msi_cap;
if (pos)
ret = qib_msi_setup(dd, pos);
else
@ -357,7 +357,7 @@ int qib_reinit_intr(struct qib_devdata *dd)
if (!dd->msi_lo)
goto bail;
pos = pci_find_capability(dd->pcidev, PCI_CAP_ID_MSI);
pos = dd->pcidev->msi_cap;
if (!pos) {
qib_dev_err(dd,
"Can't find MSI capability, can't restore MSI settings\n");
@ -426,7 +426,7 @@ void qib_enable_intx(struct pci_dev *pdev)
if (new != cw)
pci_write_config_word(pdev, PCI_COMMAND, new);
pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
pos = pdev->msi_cap;
if (pos) {
/* then turn off MSI */
pci_read_config_word(pdev, pos + PCI_MSI_FLAGS, &cw);
@ -434,7 +434,7 @@ void qib_enable_intx(struct pci_dev *pdev)
if (new != cw)
pci_write_config_word(pdev, pos + PCI_MSI_FLAGS, new);
}
pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
pos = pdev->msix_cap;
if (pos) {
/* then turn off MSIx */
pci_read_config_word(pdev, pos + PCI_MSIX_FLAGS, &cw);