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PCI: Use dev->irq instead of dev->pin to enable non MSI/INTx interrupt

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On some platforms, root port has neither MSI/MSI-X nor INTx interrupt
generated in RC mode. In this case, we have to use other interrupt, e.g.,
system shared interrupt, for port service IRQ to have AER, Hot-plug, etc.,
services work.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Shengzhou Liu 2012-07-18 14:06:54 +08:00 committed by Bjorn Helgaas
parent 0d7614f09c
commit e237d83fdf
1 changed files with 11 additions and 4 deletions
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15
drivers/pci/pcie/portdrv_core.c
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@ -200,10 +200,13 @@ static int init_service_irqs(struct pci_dev *dev, int *irqs, int mask)
{
int i, irq = -1;
/* We have to use INTx if MSI cannot be used for PCIe PME or pciehp. */
/*
* If MSI cannot be used for PCIe PME or hotplug, we have to use
* INTx or other interrupts, e.g. system shared interrupt.
*/
if (((mask & PCIE_PORT_SERVICE_PME) && pcie_pme_no_msi()) ||
((mask & PCIE_PORT_SERVICE_HP) && pciehp_no_msi())) {
if (dev->pin)
if (dev->irq)
irq = dev->irq;
goto no_msi;
}
@ -212,8 +215,12 @@ static int init_service_irqs(struct pci_dev *dev, int *irqs, int mask)
if (!pcie_port_enable_msix(dev, irqs, mask))
return 0;
/* We're not going to use MSI-X, so try MSI and fall back to INTx */
if (!pci_enable_msi(dev) || dev->pin)
/*
* We're not going to use MSI-X, so try MSI and fall back to INTx.
* If neither MSI/MSI-X nor INTx available, try other interrupt. On
* some platforms, root port doesn't support MSI/MSI-X/INTx in RC mode.
*/
if (!pci_enable_msi(dev) || dev->irq)
irq = dev->irq;
no_msi: