On Wed, Jul 21, 2021 at 09:20:00AM +0200, Thomas Gleixner wrote: > > Just walking the list seems fine to me given that this is not a > > performance criticial path. But what are the locking implications? > > At the moment there are none because the list is initialized in the > setup path and never modified afterwards. Though that might change > sooner than later to fix the virtio wreckage vs. MSI-X. What is the issue there? Either way, if we keep the helper in the IRQ code it should be easy to spot for anyone adding the locking. > > Also does the above imply this won't work for your platform MSI case? > > The msi descriptors are attached to struct device and independent of > platform/PCI/whatever. That's what I assumed, but this text from John suggested there is something odd about the platform case: "Did you consider that for PCI .."
