4d96c40a47
i'v been seeing the error condition described above in the Slowbulkin comment. so i'm enabling the work arround which seems to fix the lockup. in the split transaction case where we want to start the transaction at frame start, acquire the ctlr lock *before* checking if we are in the right frame number. so the start will happen atomically. checking the software ctlr->sofchan instead of checking the interrupt mask register seems to be quicker. setting the haint mask bit for the chan under ctlr lock in chanio() instead of chanwait() avoids needing to acquire the ctlr lock twice. mask wakechan bits with busychan bitmap in interrupt handlers so we will not try to wake up released chans by accident. sleep() and tsleep() might get interrupted so we have to release the split qlock in the split transaction case and in all cases, make sure to halt the channel before release. add some common debug functions to dump channel and controller registers. |
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