| Message ID | 9f18bc20-cf27-bc3c-71e5-4e24a6c983c7@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
| Series | PCI: set flag IRQCHIP_ONESHOT_SAFE for PCI-MSI irqchip's | expand |
On Fri, 3 Aug 2018, Heiner Kallweit wrote: > PCI-MSI is oneshot-safe, therefore set flag IRQCHIP_ONESHOT_SAFE to > avoid unneeded masking/unmasking. See also discussion here: > https://marc.info/?l=linux-pci&m=153332526101128&w=2 This changelog really wants a bit more detailed information. > Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> > --- > drivers/pci/msi.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c > index 4d88afdf..f2ef8964 100644 > --- a/drivers/pci/msi.c > +++ b/drivers/pci/msi.c > @@ -1446,6 +1446,9 @@ struct irq_domain *pci_msi_create_irq_domain(struct fwnode_handle *fwnode, > if (IS_ENABLED(CONFIG_GENERIC_IRQ_RESERVATION_MODE)) > info->flags |= MSI_FLAG_MUST_REACTIVATE; > > + /* PCI-MSI is oneshot-safe */ > + info->chip->flags |= IRQCHIP_ONESHOT_SAFE; > + > domain = msi_create_irq_domain(fwnode, info, parent); > if (!domain) > return NULL; > -- > 2.18.0 > >
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 4d88afdf..f2ef8964 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -1446,6 +1446,9 @@ struct irq_domain *pci_msi_create_irq_domain(struct fwnode_handle *fwnode, if (IS_ENABLED(CONFIG_GENERIC_IRQ_RESERVATION_MODE)) info->flags |= MSI_FLAG_MUST_REACTIVATE; + /* PCI-MSI is oneshot-safe */ + info->chip->flags |= IRQCHIP_ONESHOT_SAFE; + domain = msi_create_irq_domain(fwnode, info, parent); if (!domain) return NULL;
PCI-MSI is oneshot-safe, therefore set flag IRQCHIP_ONESHOT_SAFE to avoid unneeded masking/unmasking. See also discussion here: https://marc.info/?l=linux-pci&m=153332526101128&w=2 Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> --- drivers/pci/msi.c | 3 +++ 1 file changed, 3 insertions(+)