diff options
| author | Luis R. Rodriguez <[email protected]> | 2010-10-20 16:07:08 -0700 |
|---|---|---|
| committer | John W. Linville <[email protected]> | 2010-11-15 13:24:18 -0500 |
| commit | 78a7685e1e44c6d4b6f79c73687b9322e40b040e (patch) | |
| tree | 789fb85707a9528d2d5d6e224affec599d31a9dd /tools/perf/scripts/python/syscall-counts.py | |
| parent | b87b0128894efd3bbf7272a579f71b3a2bc500d1 (diff) | |
ath9k: add a debug warning when we cannot stop RX
We have seen several DMA races when we race against
stopping and starting the PCU. I suspect that when
we cannot stop the PCU we may hit some of these same
races so warn against them for now but only when
debugging (CONFIG_ATH_DEBUG) is enabled.
If you run into this warning and are a developer,
please fix the cause of the warning. The potential
here, although I cannot prove yet, is that the DMA
engine can be confused and start writing to a buffer
that was already DMA'd before and at least the kernel
assumes is not being accessed by hardware anymore.
Cc: Ben Greear <[email protected]>
Cc: Kyungwan Nam <[email protected]>
Signed-off-by: Luis R. Rodriguez <[email protected]>
Signed-off-by: John W. Linville <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions