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[Gerry Boland <1387199@xxxxxxxxxxxxxxxxxx>]

@Nico: If I get some positive feedback, I'll consider it.

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https://bugs.launchpad.net/bugs/1387199

Title:
  14e4:4331 [MacBookPro8,1] broadcom-sta kernel crashes

Status in bcmwl package in Ubuntu:
  Triaged

Bug description:
  1) lsb_release -rd
  Description:	Ubuntu 14.10
  Release:	14.10

  2) apt-cache policy bcmwl-kernel-source
  bcmwl-kernel-source:
    Installed: 6.30.223.248+bdcom-0ubuntu1
    Candidate: 6.30.223.248+bdcom-0ubuntu1
    Package pin: (not found)
    Version table:
   *** 6.30.223.248+bdcom-0ubuntu1 1001
          500 http://ubuntu.mirror.tudos.de/ubuntu/ utopic/restricted amd64 Packages
          100 /var/lib/dpkg/status

  3) What is expected to happen in is that the wl does not crash.

  4) What happens insted in Saucy, Trusty, and now Utopic, about once per hour, the `wl` kernel module of `bcmwl-kernel-source` crashes.  `/var/log/syslog` contains:
  Oct 29 15:10:19 fuji kernel: [73721.579735]  0000000000000009 ffff880262bdbdd0 ffffffff8277fcbc 0000000000000000
  Oct 29 15:10:19 fuji kernel: [73721.579738]  ffff880262bdbe08 ffffffff8206fd8d ffff880260aa5000 ffff8801367e0840
  Oct 29 15:10:19 fuji kernel: [73721.579742]  00000000000000a2 ffff8801facf9d80 ffff880261f28a78 ffff880262bdbe18
  Oct 29 15:10:19 fuji kernel: [73721.579745] Call Trace:
  Oct 29 15:10:19 fuji kernel: [73721.579755]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
  Oct 29 15:10:19 fuji kernel: [73721.579760]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
  Oct 29 15:10:19 fuji kernel: [73721.579764]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
  Oct 29 15:10:19 fuji kernel: [73721.579780]  [<ffffffffc030b981>] cfg80211_roamed+0x91/0xa0 [cfg80211]
  Oct 29 15:10:19 fuji kernel: [73721.579828]  [<ffffffffc06958cb>] wl_notify_roaming_status+0xcb/0x150 [wl]
  Oct 29 15:10:19 fuji kernel: [73721.579870]  [<ffffffffc0692602>] wl_event_handler+0x62/0x260 [wl]
  Oct 29 15:10:19 fuji kernel: [73721.579911]  [<ffffffffc06925a0>] ? wl_free_wdev.isra.23+0x80/0x80 [wl]
  Oct 29 15:10:19 fuji kernel: [73721.579915]  [<ffffffff82094aeb>] kthread+0xdb/0x100
  Oct 29 15:10:19 fuji kernel: [73721.579920]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
  Oct 29 15:10:19 fuji kernel: [73721.579924]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
  Oct 29 15:10:19 fuji kernel: [73721.579928]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
  Oct 29 15:10:19 fuji kernel: [73721.579930] ---[ end trace f2631d4af0f9ba2d ]---

  
  lspci -vvnn | grep -A 11 Network
  03:00.0 Network controller [0280]: Broadcom Corporation BCM4331 802.11a/b/g/n [14e4:4331] (rev 02)
   Subsystem: Apple Inc. AirPort Extreme [106b:00d6]
   Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
   Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
   Latency: 0, Cache Line Size: 256 bytes
   Interrupt: pin A routed to IRQ 17
   Region 0: Memory at a0600000 (64-bit, non-prefetchable) [size=16K]
   Capabilities: <access denied>
   Kernel driver in use: wl

  04:00.0 FireWire (IEEE 1394) [0c00]: LSI Corporation FW643 [TrueFire] PCIe 1394b Controller [11c1:5901] (rev 08) (prog-if 10 [OHCI])
   Subsystem: LSI Corporation FW643 [TrueFire] PCIe 1394b Controller [11c1:5900]

  uname -a
  Linux fuji 3.16.0-23-generic #31-Ubuntu SMP Tue Oct 21 17:56:17 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

  sudo dmidecode -s bios-version
     MBP81.88Z.0047.B27.1201241646

  sudo dmidecode -s bios-release-date
  01/24/12

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