| Message ID | 1342492551-13766-1-git-send-email-Shengzhou.Liu@freescale.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On 07/16/2012 09:35 PM, Shengzhou Liu wrote: > 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(i.e. > system shared interrupt) for port service irq to have AER, Hot-plug, etc, > services to work. > > Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com> > --- > drivers/pci/pcie/portdrv_core.c | 9 +++++++-- > 1 files changed, 7 insertions(+), 2 deletions(-) > > diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c > index 75915b3..a855254 100644 > --- a/drivers/pci/pcie/portdrv_core.c > +++ b/drivers/pci/pcie/portdrv_core.c > @@ -212,8 +212,13 @@ 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 generating MSI/MSI-X/INTx > + * in RC mode) > + */ > + if (!pci_enable_msi(dev) || dev->irq) > irq = dev->irq; What about the other usage of dev->pin a few lines up? -Scott -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
> -----Original Message----- > From: Wood Scott-B07421 > Sent: Wednesday, July 18, 2012 1:42 AM > To: Liu Shengzhou-B36685 > Cc: bhelgaas@google.com; linux-pci@vger.kernel.org; linuxppc- > dev@lists.ozlabs.org > Subject: Re: [PATCH] PCI: use dev->irq instead of dev->pin to enable non > MSI/INTx interrupt > > On 07/16/2012 09:35 PM, Shengzhou Liu wrote: > > 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(i.e. > > system shared interrupt) for port service irq to have AER, Hot-plug, > > etc, services to work. > > > > Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com> > > --- > > drivers/pci/pcie/portdrv_core.c | 9 +++++++-- > > 1 files changed, 7 insertions(+), 2 deletions(-) > > > > diff --git a/drivers/pci/pcie/portdrv_core.c > > b/drivers/pci/pcie/portdrv_core.c index 75915b3..a855254 100644 > > --- a/drivers/pci/pcie/portdrv_core.c > > +++ b/drivers/pci/pcie/portdrv_core.c > > @@ -212,8 +212,13 @@ 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 generating MSI/MSI-X/INTx > > + * in RC mode) > > + */ > > + if (!pci_enable_msi(dev) || dev->irq) > > irq = dev->irq; > > What about the other usage of dev->pin a few lines up? > > -Scott Yes, it should be consistent with bottom, done in v2. Thanks, Shengzhou
diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c index 75915b3..a855254 100644 --- a/drivers/pci/pcie/portdrv_core.c +++ b/drivers/pci/pcie/portdrv_core.c @@ -212,8 +212,13 @@ 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 generating MSI/MSI-X/INTx + * in RC mode) + */ + if (!pci_enable_msi(dev) || dev->irq) irq = dev->irq; no_msi:
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(i.e. system shared interrupt) for port service irq to have AER, Hot-plug, etc, services to work. Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com> --- drivers/pci/pcie/portdrv_core.c | 9 +++++++-- 1 files changed, 7 insertions(+), 2 deletions(-)