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 <hkallwe...@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 > >
