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| author | Bjorn Helgaas <bhelgaas@google.com> | 2018-03-13 15:03:36 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2018-03-13 15:03:36 -0500 |
| commit | 5a1e0baa34fdf458a42e5ff99e3b04d909ba99ea (patch) | |
| tree | ee08a21c2bcd2b339b9a9e82c23dd90e32f71906 | |
| parent | 7928b2cbe55b2a410a0f5c1f154610059c57b1b2 (diff) | |
| download | linux-5a1e0baa34fdf458a42e5ff99e3b04d909ba99ea.tar.bz2 | |
PCI/MSI: Don't set up INTx if MSI or MSI-X is enabled
If MSI or MSI-X is enabled, the device uses that. It uses INTx only if
both MSI and MSI-X are disabled (see PCIe r4.0, sec 7.7.1.2), so if a
device already has MSI or MSI-X enabled, there's no need to set up its
legacy INTx interrupt.
bba6f6fc68e7 ("[PATCH] MSI-X: fix resume crash") changed the cris, frv,
x86, and ia64 arches to skip INTx setup when MSI is enabled. The cris and
frv arches have since been removed.
16cf0ebc35dd ("x86/PCI: Do not use interrupt links for devices using
MSI-X") extended that by changing x86 to also skip INTx setup when MSI-X is
enabled.
Change ia64 to skip INTx setup when either MSI or MSI-X is enabled by
applying the logic from 16cf0ebc35dd to ia64 as well as x86.
Tested-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
| -rw-r--r-- | arch/ia64/pci/pci.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c index f5ec736100ee..7ccc64d5fe3e 100644 --- a/arch/ia64/pci/pci.c +++ b/arch/ia64/pci/pci.c @@ -398,7 +398,7 @@ pcibios_enable_device (struct pci_dev *dev, int mask) if (ret < 0) return ret; - if (!dev->msi_enabled) + if (!pci_dev_msi_enabled(dev)) return acpi_pci_irq_enable(dev); return 0; } @@ -407,7 +407,7 @@ void pcibios_disable_device (struct pci_dev *dev) { BUG_ON(atomic_read(&dev->enable_cnt)); - if (!dev->msi_enabled) + if (!pci_dev_msi_enabled(dev)) acpi_pci_irq_disable(dev); } |