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Date: Mon, 11 Apr 2011 12:20:13 -0400 (EDT)
From: Alan Stern <stern@rowland.harvard.edu>
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To: Zdenek Kabelac <zdenek.kabelac@gmail.com>
cc: USB list <linux-usb@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Thomas Gleixner <tglx@linutronix.de>
Subject: Re: Endless print of uhci_result_common: failed with status 440000
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On Mon, 11 Apr 2011, Zdenek Kabelac wrote:

> Ok - add some more memory debug:
> 
> [   13.347268] usb 1-1: USB disconnect, device number 3
> [   13.348113] btusb_bulk_complete: hci0 urb ffff8801367f6528 failed
> to resubmit (19)
> [   13.349111] btusb_intr_complete: hci0 urb ffff8801367f6840 failed
> to resubmit (19)
> [   13.349143] btusb_bulk_complete: hci0 urb ffff8801367fa630 failed
> to resubmit (19)
> [   13.409856] general protection fault: 0000 [#1] PREEMPT SMP
> [   13.413340] last sysfs file:
> /sys/devices/pci0000:00/0000:00:19.0/net/eth0/uevent
> [   13.413340] CPU 0
> [   13.413340] Modules linked in: ipt_REJECT xt_physdev xt_state
> iptable_filter ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4
> nf_conntrack nf_defrag_ipv4 ip_tables x_tables dm_mirror
> dm_region_hash dm_log dm_mod snd_hda_codec_analog btusb bluetooth
> virtio_net kvm_intel kvm arc4 ecb crypto_blkcipher cryptomgr aead
> crypto_algapi iwl3945 iwl_legacy snd_hda_intel snd_hda_codec usbhid
> snd_seq snd_seq_device mac80211 hid iTCO_wdt iTCO_vendor_support
> snd_pcm psmouse i2c_i801 serio_raw cfg80211 thinkpad_acpi snd_timer
> snd e1000e soundcore snd_page_alloc nvram wmi evdev i915
> drm_kms_helper drm i2c_algo_bit i2c_core uinput autofs4 pcmcia
> uhci_hcd ehci_hcd sdhci_pci sdhci sr_mod mmc_core yenta_socket cdrom
> usbcore video backlight [last unloaded: scsi_wait_scan]
> [   13.413340]
> [   13.413340] Pid: 815, comm: bluetoothd Not tainted
> 2.6.39-rc2-00144-gca71856 #121 LENOVO 6464CTO/6464CTO
> [   13.413340] RIP: 0010:[<ffffffff8109ae43>]  [<ffffffff8109ae43>]
> module_put+0x33/0x1b0
> [   13.413340] RSP: 0018:ffff8801389e1d68  EFLAGS: 00010296
> [   13.413340] RAX: ffffffffa04a32a6 RBX: 6b6b6b6b6b6b6b6b RCX: 0000000000000000
> [   13.413340] RDX: 0000000000000000 RSI: ffffffffa04a32a6 RDI: ffffffff8109ae43
> [   13.413340] RBP: ffff8801389e1d98 R08: 0000000000000000 R09: 0000000000000000
> [   13.413340] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88013b028590
> [   13.413340] R13: 00000000ffffffed R14: ffff8801390ac7b0 R15: 000000000000000a
> [   13.413340] FS:  00007fe99d67d720(0000) GS:ffff88013ba00000(0000)
> knlGS:0000000000000000
> [   13.413340] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> [   13.413340] CR2: 00007fe99d4902b0 CR3: 0000000134dea000 CR4: 00000000000006f0
> [   13.413340] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [   13.413340] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> [   13.413340] Process bluetoothd (pid: 815, threadinfo
> ffff8801389e0000, task ffff8801387d23a0)
> [   13.413340] Stack:
> [   13.413340]  ffff88013b028000 ffff88013b028000 ffff88013b028590
> 00000000ffffffed
> [   13.413340]  ffff8801390ac7b0 000000000000000a ffff8801389e1de8
> ffffffffa04a32a6
> [   13.413340]  ffff8801389e1db8 ffffffff8124f11a ffff8801389e1dd8
> 00000000400448c9
> [   13.413340] Call Trace:
> [   13.413340]  [<ffffffffa04a32a6>] hci_dev_open+0x96/0x3f0 [bluetooth]
> [   13.413340]  [<ffffffff8124f11a>] ? security_capable+0x2a/0x30
> [   13.413340]  [<ffffffffa04b0172>] hci_sock_ioctl+0x1e2/0x4b0 [bluetooth]

> So - it looks like disabling BT in runtime is not enough  to avoid problems ;)
> 
> So I've blacklisted  bluetooth & btusb -  and made quite several
> suspend/resume cycles  -
> and without  a single problem.
> 
> So I'll keep an eye on this - but so far complete deactivation of BT
> either in BIOS or modules blacklisting solves the problem of weird
> USB deadlocking.

Clearly there's something going wrong in the Bluetooth drivers.  You 
should try posting some of this on the linux-bluetooth mailing list.

Alan Stern

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