Hi Greg at al, Recently I have been looking at the device links code because of the recent discussion on possibly using them in the DRM subsystem (see for example https://marc.info/?l=linux-pm&m=154832771905309&w=2) and I have found a few issues in that code which should be addressed by this patch series. Please refer to the patch changelogs for details.
None of the problems addressed here should be manifesting themselves in mainline kernel today, but if there are more device links users in the future, they most likely will be encountered sooner or later. Also they need to be fixed for the DRM use case to be supported IMO. This series does not fix all issues in device links that have become apparent (generally speaking, the idea of returning an existing link in case there is one already for the given consumer-supplier pair doesn't play well with stateful links and their flags), so there will be a follow-up series of patches to clean that up. Still, I don't see a reason to sit on these fixes while working on the other patches, so here they go. Cheers, Rafael
