Turn off IRQ on stopWaveform after Tone timeout #7232
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Fix esp8266#7230 (until 3.0 when this whole code will probably change). Before, a timed out pin would clear its bit in `waveformEnabled`. The logic in `stopWaveform`. If only one tone was running and timed out, `stopWaveform` would check the `enabled` bitmask and see nothing active and immediately return w/o cancelling the IRQ. So, the IRQ would be called every 1/100th of a second and return immediately when no work to be done was detected. Remove the check and always send in a `waveformToDisable` bit. It's save to disable an already disabled pin, so no logical consequences will occur, and the final IRQ disable will be executed when appropriate.
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@earlephilhower Off the top of my head, your fix isn't right, if you'd just cherry-pick mine from PR#7022 it will be correct? |
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@dok-net I'm looking at your commit bb3ee99 . I think we're both fine here. It's doing the same thing, but this small PR sends in the In your PR it's also possible to have a race condition where the bit is cleared in |
devyte
requested changes
Apr 20, 2020
s-hadinger
reviewed
Apr 20, 2020
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Closing |
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Fix #7230 (until 3.0 when this whole code will probably change).
Before, a timed out pin would clear its bit in
waveformEnabled. Thelogic in
stopWaveform. If only one tone was running and timed out,stopWaveformwould check theenabledbitmask and see nothing activeand immediately return w/o cancelling the IRQ. So, the IRQ would be
called every 1/100th of a second and return immediately when no work to
be done was detected.
Remove the check and always send in a
waveformToDisablebit. It'ssave to disable an already disabled pin, so no logical consequences will
occur, and the final IRQ disable will be executed when appropriate.