On 01/08/17 18:59, Robin Murphy wrote: > Currently, we handle all DMA aliases equally when calculating MSI > requester IDs for the generic infrastructure. This turns out to be the > wrong thing to do in the face of pure DMA quirks like those of Marvell > SATA cards, where in the usual case the last thing seen in the alias > walk is the DMA phantom function: we end up configuring the MSI > doorbell to expect that alias, then find we have no interrupts since > the MSI writes still come from the 'real' RID, thus get filtered out > and ignored. > > Improve the alias walk to only account for the topological aliases that > matter, based on the logic from the Intel IRQ remapping code. > > Signed-off-by: Robin Murphy <robin.murphy@xxxxxxx> Acked-by: Marc Zyngier <marc.zyngier@xxxxxxx> M. -- Jazz is not dead. It just smells funny...
