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| author |   stsp <stsp@openbsd.org> | 2020-02-12 16:02:51 +0000 |
|---|---|---|
| committer | stsp <stsp@openbsd.org> | 2020-02-12 16:02:51 +0000 |
| commit | eb93640f5e88d3a38d60d25998221f75b84cc369 (patch) | |
| tree | c5419394906c0eb83093792fa2a3dd4d62ef8eaa /usr.bin/mandoc/man_html.c | |
| parent | Check bogus values from interrupt in ict and non-ict case. r1 and r2 (diff) | |
| download | wireguard-openbsd-eb93640f5e88d3a38d60d25998221f75b84cc369.tar.xz wireguard-openbsd-eb93640f5e88d3a38d60d25998221f75b84cc369.zip | |
Implement a workaround for missing Tx completion interrupts in iwm(4).
iwm(4) releases resources whenever hardware signals Tx completion for a
frame at Tx queue index 'N'. It has been observed that we sometimes get
an interrupt for frame 'N - 2' followed by an interrupt for frame 'N',
with no interrupt being received for frame 'N - 1'.
Whenever this occurred a later decision to roam to another AP would fail
since AP node references for frames affected by missing interrupts were
never released. Another side-effect was an mbuf leak.
The problem was first observed at 36c3 and debugged there with bluhm@.
ok tobhe@
Diffstat (limited to 'usr.bin/mandoc/man_html.c')
0 files changed, 0 insertions, 0 deletions