freebsd with flexible iflib nic queues
a3fd3b1429
we did suspend it. The whole suspend/resume TID queue thing is supposed to be a matched reference count - a subsystem (eg addba negotiation, BAR transmission, filtered frames, etc) is supposed to call pause() once and then resume() once. ath_tx_tid_filt_comp_complete() is called upon the completion of any filtered frame, regardless of whether the driver had aleady seen a filtered frame and called pause(). So only call resume() if tid->isfiltered = 1, which indicates that we had called pause() once. This fixes a seemingly whacked and different problem - traffic hangs. What was actually going on: * There'd be some marginal link with crappy behaviour, causing filtered frames and BAR TXing to occur; * A BAR TX would occur, setting the new BAW (block-ack window) to seqno n; * .. and pause() would be called, blocking further transmission; * A filtered frame completion would occur from the hardware, but with tid->isfiltered = 0 which indiciates we haven't actually marked the queue yet as filtered; * ath_tx_tid_filt_comp_complete() would call resume(), continuing transmission; * Some frames would be queued to the hardware, since the TID is now no longer paused; * .. and if some make it out and ACked successfully, the new BAW may be seqno n+1 or more; * .. then the BAR TX completes and sets the new seqno back to n. At this point the BAW tracking would be loopy because the BAW start was modified but the BAW ring buffer wasn't updated in lock step. Tested: * Routerstation Pro + AR9220 AP |
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| cddl | ||
| contrib | ||
| crypto | ||
| etc | ||
| games | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| lib | ||
| libexec | ||
| release | ||
| rescue | ||
| sbin | ||
| secure | ||
| share | ||
| sys | ||
| tests | ||
| tools | ||
| usr.bin | ||
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| COPYRIGHT | ||
| LOCKS | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc1 | ||
| ObsoleteFiles.inc | ||
| README | ||
| UPDATING | ||
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