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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 | ||
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| secure | ||
| share | ||
| sys | ||
| tests | ||
| tools | ||
| usr.bin | ||
| usr.sbin | ||
| COPYRIGHT | ||
| LOCKS | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc1 | ||
| ObsoleteFiles.inc | ||
| README | ||
| UPDATING | ||
This is the top level of the FreeBSD source directory. This file was last revised on: $FreeBSD$ For copyright information, please see the file COPYRIGHT in this directory (additional copyright information also exists for some sources in this tree - please see the specific source directories for more information). The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree, the most commonly used one being ``world'', which rebuilds and installs everything in the FreeBSD system from the source tree except the kernel, the kernel-modules and the contents of /etc. The ``world'' target should only be used in cases where the source tree has not changed from the currently running version. See: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html for more information, including setting make(1) variables. The ``buildkernel'' and ``installkernel'' targets build and install the kernel and the modules (see below). Please see the top of the Makefile in this directory for more information on the standard build targets and compile-time flags. Building a kernel is a somewhat more involved process, documentation for which can be found at: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html And in the config(8) man page. Note: If you want to build and install the kernel with the ``buildkernel'' and ``installkernel'' targets, you might need to build world before. More information is available in the handbook. The sample kernel configuration files reside in the sys/<arch>/conf sub-directory (assuming that you've installed the kernel sources), the file named GENERIC being the one used to build your initial installation kernel. The file NOTES contains entries and documentation for all possible devices, not just those commonly used. It is the successor of the ancient LINT file, but in contrast to LINT, it is not buildable as a kernel but a pure reference and documentation file. Source Roadmap: --------------- bin System/user commands. cddl Various commands and libraries under the Common Development and Distribution License. contrib Packages contributed by 3rd parties. crypto Cryptography stuff (see crypto/README). etc Template files for /etc. games Amusements. gnu Various commands and libraries under the GNU Public License. Please see gnu/COPYING* for more information. include System include files. kerberos5 Kerberos5 (Heimdal) package. lib System libraries. libexec System daemons. release Release building Makefile & associated tools. rescue Build system for statically linked /rescue utilities. sbin System commands. secure Cryptographic libraries and commands. share Shared resources. sys Kernel sources. tools Utilities for regression testing and miscellaneous tasks. usr.bin User commands. usr.sbin System administration commands. For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/synching.html