[DragonFlyBSD - Bug #2685] configuring ath0 freezes the system

bugtracker-admin at leaf.dragonflybsd.org bugtracker-admin at leaf.dragonflybsd.org
Thu Jun 19 23:22:31 PDT 2014

Issue #2685 has been updated by swildner.

Can you give us a dump in the failing state?

Backup the working kernel by copying the /boot/kernel directory to /boot/kernel.bak. Then, revert the patch, recompile/install the kernel and bring it to the point where it hangs. Then, hit CTL-ALT-ESC to break into ddb. At the "db>" prompt, do "call dumpsys" (it should dump to disk then and countdown numbers on the console). When it is finished do "reset" to reboot. At the loader menu, it will then give you an option (I think it's "b") to boot the previously backed up working kernel.bak. Upon coming up, it will save the dump to /var/crash. Then, tar/xz the kern.XX and vmcore.XX with the highest number from /var/crash and put it up somewhere from where it can be downloaded.

Bug #2685: configuring ath0 freezes the system

* Author: xbit
* Status: New
* Priority: Normal
* Assignee: 
* Category: Driver
* Target version: 3.8.0
Loading if_ath works, but when configuring the device the system locks up/freezes.

System has been upgraded from 3.6-RELEASE via buildworld, installworld. Kernel is GENERIC_X64_86 and HEAD is 358af07.

Running "ifconfig ath0 up" works.

Then calling "ifconfig wlan0 create wlandev ath0" freezes the system.

I discovered the follwoing kernel message when trying to configure the device using /etc/rc.d/netif.

ath0: _ath_power_restore_power_state.refcount=0?

I also applied the change from http://lists.dragonflybsd.org/pipermail/commits/2014-June/270210.html via cherry-picking, but no changes.

The 3.6-RELEASE have been used successfully with the same hardware.

Here are the ath related snippets from the dmesg output:

wlan: <802.11 Link Layer>                                                                                                      
ath_dfs: WTF module                                                                                                            
ath_rate: <SampleRate bit-rate selection algorithm>                                                                            
ath0: <Atheros 2413> [tentative] mem 0xfebf0000-0xfebfffff irq 20 at                                                           
device 5.0 on pci3                                                                                                             
ath0: Reserved 0x10000 bytes for rid 0x10 type 3 at 0xfebf0000                                                                 
ath0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps                                                                                    
ath0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps                                                          
24Mbps 36Mbps 48Mbps 54Mbps                                                                                                    
ath0: AR2413 mac 7.8 RF2413 phy 4.5                                                                                            
ath0: 2GHz radio: 0x0000; 5GHz radio: 0x0056                                                                                   
ath0: Use hw queue 1 for WME_AC_BE traffic                                                                                     
ath0: Use hw queue 0 for WME_AC_BK traffic                                                                                     ath0: Use hw queue 2 for WME_AC_VI traffic                                                                                     
ath0: Use hw queue 3 for WME_AC_VO traffic                                                                                     
ath0: Use hw queue 8 for CAB traffic                                                                                           
ath0: Use hw queue 9 for beacons                                                                                               
ath0: using multicast key search                                                                                               
ath0: <Atheros 2413> [attached!] mem 0xfebf0000-0xfebfffff irq 20 at                                                           
device 5.0 on pci3                                                                                                             
pci3: <ACPI PCI bus> [attached!] on pcib3                                                                                      
pcib3: <ACPI PCI-PCI bridge> [attached!] at device 20.4 on pci0

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