On Tue, 11 Feb 2025 19:21:55 +0000, Frank Li <Frank.Li@xxxxxxx> wrote: > > Add the flag IRQ_DOMAIN_FLAG_MSI_IMMUTABLE and the API function > irq_domain_is_msi_immutable() to check if the MSI controller retains an > immutable address/data pair during irq_set_affinity(). > > Ensure compatibility with MSI users like PCIe Endpoint Doorbell, which > require the address/data pair to remain unchanged after setup. Use this > function to verify if the MSI controller is immutable. Why is that a requirement? Why should a driver even care? M. -- Without deviation from the norm, progress is not possible.
