Mark asked for this in the es8316 thread [1]: have mixer-test check for other controls changing when one is written. Patch 2 adds that.
Patch 1 fixes a bug that testing patch 2 turned up. With a driver that notifies a neighbour with a value event, wait_for_event() returns on the neighbour's event and the next test reports a spurious one. The cost is two extra writes per control and a read of every other control on the card after each. On the two cards here, 39 controls in all, the run time does not move. I have no card with hundreds of controls to measure against the 45 second kselftest timeout. [1] https://lore.kernel.org/all/[email protected]/ HyeongJun An (2): selftests/alsa: Do not take another control's event as our own selftests/alsa: Check that a write does not silently change other controls tools/testing/selftests/alsa/mixer-test.c | 235 +++++++++++++++++++++- 1 file changed, 234 insertions(+), 1 deletion(-) -- 2.43.0
