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    SubjectRe: Kernel WARNING: at net/core/dev.c:1330 __netif_schedule+0x2c/0x98()
    Patrick McHardy wrote:
    > Larry Finger wrote:
    >>
    >> =============================================
    >> [ INFO: possible recursive locking detected ]
    >> 2.6.26-Linus-git-05752-g93ded9b #49
    >
    > ^^^^^^^^^^^^^^ dirty?
    >
    > This kernel is not using the patches we sent.

    No, but they didn't make any difference. I tried with all 3 applied, then backed
    them out one by one. That was the state when I posted before.

    Here are the dumps with all 3 patches applied:

    =============================================
    [ INFO: possible recursive locking detected ]
    2.6.26-Linus-05752-g93ded9b-dirty #53
    ---------------------------------------------
    b43/1997 is trying to acquire lock:
    (_xmit_IEEE80211#2){-...}, at: [<ffffffffa028f322>]
    ieee80211_scan_completed+0x130/0x2e1 [mac80211]

    but task is already holding lock:
    (_xmit_IEEE80211#2){-...}, at: [<ffffffffa028f322>]
    ieee80211_scan_completed+0x130/0x2e1 [mac80211]

    other info that might help us debug this:
    3 locks held by b43/1997:
    #0: ((name)){--..}, at: [<ffffffff80245185>] run_workqueue+0xa7/0x1f2
    #1: (&(&local->scan_work)->work){--..}, at: [<ffffffff80245185>]
    run_workqueue+0xa7/0x1f2
    #2: (_xmit_IEEE80211#2){-...}, at: [<ffffffffa028f322>]
    ieee80211_scan_completed+0x130/0x2e1 [mac80211]

    stack backtrace:
    Pid: 1997, comm: b43 Not tainted 2.6.26-Linus-05752-g93ded9b-dirty #53

    Call Trace:
    [<ffffffff80255616>] __lock_acquire+0xb7b/0xecc
    [<ffffffff8040c9a0>] __mutex_unlock_slowpath+0x100/0x10b
    [<ffffffff802559b8>] lock_acquire+0x51/0x6a
    [<ffffffffa028f322>] ieee80211_scan_completed+0x130/0x2e1 [mac80211]
    [<ffffffff8040dc08>] _spin_lock+0x1e/0x27
    [<ffffffffa028f322>] ieee80211_scan_completed+0x130/0x2e1 [mac80211]
    [<ffffffffa028f6ce>] ieee80211_sta_scan_work+0x0/0x1b8 [mac80211]
    [<ffffffff802451ce>] run_workqueue+0xf0/0x1f2
    [<ffffffff802453ab>] worker_thread+0xdb/0xea
    [<ffffffff80248a5f>] autoremove_wake_function+0x0/0x2e
    [<ffffffff802452d0>] worker_thread+0x0/0xea
    [<ffffffff80248731>] kthread+0x47/0x73
    [<ffffffff8040d7b1>] trace_hardirqs_on_thunk+0x3a/0x3f
    [<ffffffff8020ceb9>] child_rip+0xa/0x11
    [<ffffffff8020c4ef>] restore_args+0x0/0x30
    [<ffffffff802486c5>] kthreadd+0x19a/0x1bf
    [<ffffffff802486ea>] kthread+0x0/0x73
    [<ffffffff8020ceaf>] child_rip+0x0/0x11

    ------------[ cut here ]------------
    WARNING: at net/core/dev.c:1344 __netif_schedule+0x2c/0x98()
    Modules linked in: af_packet rfkill_input nfs lockd nfs_acl sunrpc
    cpufreq_conservative cpufreq_userspace cpufreq_powersave powernow_k8 fuse loop
    dm_mod arc4 ecb crypto_blkcipher b43 firmware_class rfkill mac80211
    snd_hda_intel cfg80211 led_class input_polldev k8temp snd_pcm snd_timer battery
    hwmon sr_mod forcedeth ssb joydev ac button serio_raw cdrom snd soundcore
    snd_page_alloc sg sd_mod ohci_hcd ehci_hcd usbcore edd fan thermal processor
    ext3 mbcache jbd pata_amd ahci libata scsi_mod dock
    Pid: 1997, comm: b43 Not tainted 2.6.26-Linus-05752-g93ded9b-dirty #53

    Call Trace:
    [<ffffffff80235d49>] warn_on_slowpath+0x51/0x8c
    [<ffffffff8040d7b1>] trace_hardirqs_on_thunk+0x3a/0x3f
    [<ffffffff803a2413>] __netif_schedule+0x2c/0x98
    [<ffffffffa028f44d>] ieee80211_scan_completed+0x25b/0x2e1 [mac80211]
    [<ffffffffa028f6ce>] ieee80211_sta_scan_work+0x0/0x1b8 [mac80211]
    [<ffffffff802451ce>] run_workqueue+0xf0/0x1f2
    [<ffffffff802453ab>] worker_thread+0xdb/0xea
    [<ffffffff80248a5f>] autoremove_wake_function+0x0/0x2e
    [<ffffffff802452d0>] worker_thread+0x0/0xea
    [<ffffffff80248731>] kthread+0x47/0x73
    [<ffffffff8040d7b1>] trace_hardirqs_on_thunk+0x3a/0x3f
    [<ffffffff8020ceb9>] child_rip+0xa/0x11
    [<ffffffff8020c4ef>] restore_args+0x0/0x30
    [<ffffffff802486c5>] kthreadd+0x19a/0x1bf
    [<ffffffff802486ea>] kthread+0x0/0x73
    [<ffffffff8020ceaf>] child_rip+0x0/0x11

    ---[ end trace 88fab857dc2a4242 ]---

    Larry






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