Quoting Takashi Iwai (2019-01-14 17:46:57) > On Mon, 14 Jan 2019 18:37:53 +0100, > Chris Wilson wrote: > > > > Just in case the audio linkage is swapped between components during the > > runtime pm sequence, we need to protect the rpm tracking with a mutex. > > It's not clear to me how does this happens. > Could you elaborate a bit more the scenario?
The code is written such that multiple bits within display_power_status can be set and cleared simultaneously. There was no serialisation mentioned in the routine, so I was fearful that the display_power_active here was being accessed concurrently -- and if that was explaining why snd/hda appears to be leaking the runtime pm (or at least is holding on to the wakeref longer than igt expects, > 10s). -Chris _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
