On Fri, Nov 11, 2022 at 02:55:09PM +0100, Thomas Gleixner wrote: > When hierarchical MSI interrupt domains are enabled then there is no point > to do tons of work and detect the missing support for multi-MSI late in the > allocation path. > > Just query the domain feature flags right away. The query function is going > to be used for other purposes later and has a mode argument which influences > the result: > > ALLOW_LEGACY returns true when: > - there is no irq domain attached (legacy support) > - there is a irq domain attached which has the feature flag set > > DENY_LEGACY returns only true when: > - there is a irq domain attached which has the feature flag set > > This allows to use the function universally without ifdeffery in the > calling code. > > Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > --- > drivers/pci/msi/irqdomain.c | 22 ++++++++++++++++++++++ > drivers/pci/msi/msi.c | 4 ++++ > drivers/pci/msi/msi.h | 9 +++++++++ > 3 files changed, 35 insertions(+) Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx> Jason
