On Fri, Jul 02, 2021 at 11:05:54PM +0800, Ming Lei wrote: > blk-mq needs to know if the device uses managed irq, so add one field > to virtio_device for recording if device uses managed irq. > > If the driver use managed irq, this flag has to be set so it can be > passed to blk-mq. I don't think all this boilerplate code make a whole lot of sense. I think we need to record this information deep down in the irq code by setting a flag in struct device only if pci_alloc_irq_vectors_affinity atually managed to allocate multiple vectors and the PCI_IRQ_AFFINITY flag was set. Then blk-mq can look at that flag, and also check that more than one queue is in used and work based on that.
