Bug 12459 - Kernel\System hangs when using the Ath9k Driver.
Summary: Kernel\System hangs when using the Ath9k Driver.
Status: CLOSED INVALID
Alias: None
Product: Networking
Classification: Unclassified
Component: Wireless (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: Luis Chamberlain
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2009-01-16 06:44 UTC by wvdakker
Modified: 2009-01-16 12:34 UTC (History)
1 user (show)

See Also:
Kernel Version: 2.6.28
Subsystem:
Regression: ---
Bisected commit-id:


Attachments

Description wvdakker 2009-01-16 06:44:30 UTC
Latest working kernel version: none
Earliest failing kernel version: 2.6.28
Distribution: -
Hardware Environment: IBM eServer 206, 3Ghz, Dual CPU, AR5416 802.11abgn Wireless PCI Adapter (rev 01)
Software Environment: Hostapd 0.6.7
Problem Description: Kernel\System hangs when using the Ath9k Driver in Accesspoint mode (not knows in managed mode).
If hostapd is started and stopped the system hangs. Also if hostapd is started and the wifi card is used the system also hangs after some time. So the card is not usable yet in my configuration.
There are some configurations knows which had the same problems but after upgrade to 2.6.27.8 the problem was solved. This had probably to do with DMA issues. Dont know if this problems is DMA related.
I have tried to use the NMI-Watchdog parameter when starting the kernel. But then also no info on console or log is produced. Only way to get the system running is to reset.
Several patched for the ath9k card is used. Also known working configs for hostapd are used. But the system hang still occurs.
I also have tried the latest wireless-testing trunk, this also wont fix my problem.


Steps to reproduce:
-start hostapd.
-connect with a wireless station.
-do some browsing
-system hangs

also to reproduce:
- start hostapd
- stop hostapd
- start hostapd
- system hangs

also to reproduce"
- start hostapd
- connect with a wireless station
- open browser
- open kmail
- system hangs.
Comment 1 Andrew Morton 2009-01-16 09:01:02 UTC
Reassigned to networking/wireless
Comment 2 Luis Chamberlain 2009-01-16 12:06:27 UTC
AP mode is not enabled in 2.6.28.

When  you would try to add an interface with ieee80211_add_iface() nl80211_type_check() would be called and since it doesn't have NL80211_IFTYPE_AP in the switch statement it would fail.

AP mode is enabled on 2.6.29 though. Please close this bug.

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