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ath9k DMA problems

DISCUSSION Howard Chu 2 participants 3 messages Aug 26, 2009 – Aug 30, 2009

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Howard Chu

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Still seeing occasional hangs using the ath9k in 2.6.31-rc6, and even worse using compat-wireless 2009-08-22. Today I got this which was even more interesting:

[369014.776586] wlan0: associate with AP 00:12:17:26:56:10 (try 1)
[369014.779197] wlan0: RX ReassocResp from 00:12:17:26:56:10 (capab=0x411 status=0 aid=2)
[369014.779197] wlan0: associated
[369472.707961] ath9k: DMA failed to stop in 10 ms AR_CR=0xdeadbeef AR_DIAG_SW=0xdeadbeef

This is on an HP dv5z laptop, it reports an AR9280 at boot.

Signature · 4 lines
  -- Howard Chu
  CTO, Symas Corp.           http://www.symas.com
  Director, Highland Sun     http://highlandsun.com/hyc/
  Chief Architect, OpenLDAP  http://www.openldap.org/project/
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#1 lore raw

Am I the only one having these problems? ath9k hasn't worked well for me since 2.6.29.4; every snapshot since then has suffered from random drops. In 2.6.29.6 it at least would quickly reassociate. The current ones hang within 20-30 minutes of use and never come back. The compat-wireless snapshots have all been equally unusable.

Quoted 12 lines · Howard Chu

Still seeing occasional hangs using the ath9k in 2.6.31-rc6, and even worse using compat-wireless 2009-08-22. Today I got this which was even more interesting:

[369014.776586] wlan0: associate with AP 00:12:17:26:56:10 (try 1)
[369014.779197] wlan0: RX ReassocResp from 00:12:17:26:56:10 (capab=0x411
status=0 aid=2)
[369014.779197] wlan0: associated
[369472.707961] ath9k: DMA failed to stop in 10 ms AR_CR=0xdeadbeef

AR_DIAG_SW=0xdeadbeef

This is on an HP dv5z laptop, it reports an AR9280 at boot.

Signature · 4 lines
  -- Howard Chu
  CTO, Symas Corp.           http://www.symas.com
  Director, Highland Sun     http://highlandsun.com/hyc/
  Chief Architect, OpenLDAP  http://www.openldap.org/project/
#2 lore raw
Quoted 6 lines · Howard Chu

Am I the only one having these problems? ath9k hasn't worked well for me since 2.6.29.4; every snapshot since then has suffered from random drops. In 2.6.29.6 it at least would quickly reassociate. The current ones hang within 20-30 minutes of use and never come back. The compat-wireless snapshots have all been equally unusable.

Quoted 13 lines
Quoted 12 lines · Howard Chu

Still seeing occasional hangs using the ath9k in 2.6.31-rc6, and even worse using compat-wireless 2009-08-22. Today I got this which was even more interesting:

[369014.776586] wlan0: associate with AP 00:12:17:26:56:10 (try 1)
[369014.779197] wlan0: RX ReassocResp from 00:12:17:26:56:10 (capab=0x411
status=0 aid=2)
[369014.779197] wlan0: associated
[369472.707961] ath9k: DMA failed to stop in 10 ms AR_CR=0xdeadbeef

AR_DIAG_SW=0xdeadbeef

This is on an HP dv5z laptop, it reports an AR9280 at boot.

Neither for me - I'm on an HP dv6 series laptop and have AR9285 chip. I have also posted my logs to the ath9k-devel list, but yet to receive any further response.

The driver seems quite erratic - especially under heavy network load & also after pm-resume.

Admittedly, I haven't tried compat-wireless at all.

Kunal