Message-Id: <20100121160853.bdcd33a1.akpm@linux-foundation.org>
Date:	Thu, 21 Jan 2010 16:08:53 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Udo van den Heuvel <udovdh@...all.nl>
Cc:	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
	Oliver Neukum <oliver@...kum.name>
Subject: Re: WARNING: at net/sched/sch_generic.c:261
 dev_watchdog+0x21a/0x230()

(cc's added)

On Sat, 09 Jan 2010 15:15:44 +0100
Udo van den Heuvel <udovdh@...all.nl> wrote:

> 
> Hello,
> 
> I just powered up my H2210 Ipaq PDA and the kernel on the workstation it
> was attached to mentioned:

Looks like the USB CDC driver has problems in that 2.6.32.x kernel.

> IPv6 addrconf: prefix with wrong length 48
> IPv6 addrconf: prefix with wrong length 48
> IPv6 addrconf: prefix with wrong length 48
> IPv6 addrconf: prefix with wrong length 48
> IPv6 addrconf: prefix with wrong length 48
> usb 3-1: new full speed USB device using ohci_hcd and address 2
> usb 3-1: New USB device found, idVendor=049f, idProduct=505a
> usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> usb 3-1: Product: Ethernet Gadget
> usb 3-1: Manufacturer: Linux 2.6.15-hh1/pxa2xx_udc
> usb 3-1: configuration #1 chosen from 1 choice
> usb0: register 'cdc_subset' at usb-0000:00:12.1-1, Linux Device,
> 9e:b5:6f:2c:07:4c
> usb 3-1: USB disconnect, address 2
> usb0: unregister 'cdc_subset' usb-0000:00:12.1-1, Linux Device
> usb 3-1: new full speed USB device using ohci_hcd and address 3
> usb 3-1: New USB device found, idVendor=0525, idProduct=a4a2
> usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> usb 3-1: Product: RNDIS/Ethernet Gadget
> usb 3-1: Manufacturer: Linux 2.6.21-hh20/pxa2xx_udc
> usb 3-1: configuration #1 chosen from 2 choices
> usb0: register 'cdc_subset' at usb-0000:00:12.1-1, Linux Device,
> 9e:b5:6f:2c:07:4c
> usb0: no IPv6 routers present
> ata7: exception Emask 0x10 SAct 0x0 SErr 0x0 action 0xe frozen
> ata7: irq_stat 0x00a00080, device exchanged
> ata7: hard resetting link
> usb 2-6: new high speed USB device using ehci_hcd and address 5
> usb 2-6: New USB device found, idVendor=05e3, idProduct=0608
> usb 2-6: New USB device strings: Mfr=0, Product=1, SerialNumber=0
> usb 2-6: Product: USB2.0 Hub
> usb 2-6: configuration #1 chosen from 1 choice
> hub 2-6:1.0: USB hub found
> hub 2-6:1.0: 4 ports detected
> usb 2-6.4: new high speed USB device using ehci_hcd and address 6
> usb 2-6.4: New USB device found, idVendor=05e3, idProduct=0723
> usb 2-6.4: New USB device strings: Mfr=3, Product=4, SerialNumber=2
> usb 2-6.4: Product: USB Storage
> usb 2-6.4: Manufacturer: Generic
> usb 2-6.4: SerialNumber: 000000009451
> usb 2-6.4: configuration #1 chosen from 1 choice
> Initializing USB Mass Storage driver...
> scsi9 : SCSI emulation for USB Mass Storage devices
> usb-storage: device found at 6
> usb-storage: waiting for device to settle before scanning
> usbcore: registered new interface driver usb-storage
> USB Mass Storage support registered.
> ------------[ cut here ]------------
> WARNING: at net/sched/sch_generic.c:261 dev_watchdog+0x21a/0x230()
> Hardware name:
> NETDEV WATCHDOG: usb0 (cdc_subset): transmit queue 0 timed out
> Modules linked in: usb_storage hid_sunplus usbhid radeon ttm
> drm_kms_helper drm fb i2c_algo_bit cfbcopyarea cfbimgblt cfbfillrect
> rfcomm sco bridge stp llc bnep l2cap nfsd nfs_acl auth_rpcgss exportfs
> it87 hwmon_vid lockd sunrpc ipt_REJECT iptable_filter ipt_MASQUERADE
> iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 ip_tables
> nf_conntrack_netbios_ns ip6t_REJECT xt_tcpudp nf_conntrack_ipv6 xt_state
> nf_conntrack ip6table_filter ip6_tables x_tables ipv6 powernow_k8
> binfmt_misc pwc videodev v4l1_compat v4l2_compat_ioctl32 btusb bluetooth
> usblp dm_mirror dm_region_hash dm_log snd_hda_codec_atihdmi
> snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_seq snd_seq_device
> snd_pcm snd_timer snd ohci1394 sr_mod ppdev ehci_hcd sg ieee1394
> parport_pc snd_page_alloc parport ohci_hcd evdev cdrom i2c_piix4 k10temp
> button pata_atiixp sata_sil24 floppy [last unloaded: scsi_wait_scan]
> Pid: 0, comm: swapper Not tainted 2.6.32.2 #4
> Call Trace:
>  <IRQ>  [<ffffffff81042d43>] ? warn_slowpath_common+0x73/0xb0
>  [<ffffffff8103c92e>] ? walk_tg_tree+0x8e/0xc0
>  [<ffffffff81042de0>] ? warn_slowpath_fmt+0x40/0x50
>  [<ffffffff811a9761>] ? strlcpy+0x41/0x50
>  [<ffffffff812f25ca>] ? dev_watchdog+0x21a/0x230
>  [<ffffffff810340ac>] ? __wake_up+0x3c/0x60
>  [<ffffffff8135d912>] ? _spin_unlock_irqrestore+0x12/0x40
>  [<ffffffff812f23b0>] ? dev_watchdog+0x0/0x230
>  [<ffffffff8104d052>] ? run_timer_softirq+0x162/0x260
>  [<ffffffff810615fb>] ? ktime_get+0x5b/0xe0
>  [<ffffffff810487e4>] ? __do_softirq+0xb4/0x140
>  [<ffffffff8100c3ec>] ? call_softirq+0x1c/0x30
>  [<ffffffff8100e2ed>] ? do_softirq+0x4d/0x80
>  [<ffffffff810484c5>] ? irq_exit+0x85/0x90
>  [<ffffffff8101eccb>] ? smp_apic_timer_interrupt+0x6b/0xa0
>  [<ffffffff8100bde3>] ? apic_timer_interrupt+0x13/0x20
>  <EOI>  [<ffffffff81012e10>] ? default_idle+0x20/0x40
>  [<ffffffff8101316b>] ? c1e_idle+0x7b/0x100
>  [<ffffffff8100a516>] ? cpu_idle+0x56/0xc0
> ---[ end trace c9c0cf5c72497ec6 ]---
> 
> 
> This is on Fedora 12 x86_64 with a kernel.org 2.6.32.2...
> 

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