Bug 175446 - [ath] high volumes of PHY errors lead to BB/MAC hangs and resets
Summary: [ath] high volumes of PHY errors lead to BB/MAC hangs and resets
Status: Open
Alias: None
Product: Base System
Classification: Unclassified
Component: wireless (show other bugs)
Version: 1.0-CURRENT
Hardware: Any Any
: Normal Affects Only Me
Assignee: freebsd-wireless (Nobody)
Depends on:
Reported: 2013-01-20 06:30 UTC by Adrian Chadd
Modified: 2018-05-28 19:44 UTC (History)
0 users

See Also:


Note You need to log in before you can comment on or make changes to this bug.
Description Adrian Chadd freebsd_committer 2013-01-20 06:30:00 UTC
There seem to be some situations where high volumes of PHY errors lead to BB and MAC hangs.

These have been observed on the AR9220/AR9280 and later chips. It doesn't seem to affect the AR5416/AR9160 for some reason (and not the earlier chips as well.)

This PR will track the changes made to try and trace down and fix the specific issue(s) surrounding this particular issue.


The specific fixes I've been told about:

* AR9280, AR9285, AR9287 - don't do PHY error accounting, use the hardware counters;
* The bug here has to do with zero-length DMA frames and some issues with them in the RX FIFO;
* Radar and spectral scan frames don't cause issues - they're not zero-length payload frames.
How-To-Repeat: Enable radar/spectral scan and do some traffic.
Comment 1 Adrian Chadd freebsd_committer 2013-01-20 07:14:15 UTC
Responsible Changed
From-To: freebsd-bugs->freebsd-wireless

Comment 2 Eitan Adler freebsd_committer freebsd_triage 2018-05-28 19:44:45 UTC
batch change:

For bugs that match the following
-  Status Is In progress 
- Untouched since 2018-01-01.
- Affects Base System OR Documentation


Reset to open status.

I did a quick pass but if you are getting this email it might be worthwhile to double check to see if this bug ought to be closed.