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July 2005

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Subject:
Re: SL 4.0 - unpluging USB flash disk causes a kernel panic
From:
"Stephen J. Gowdy" <[log in to unmask]>
Reply To:
Stephen J. Gowdy
Date:
Wed, 13 Jul 2005 18:56:31 +0200
Content-Type:
TEXT/PLAIN
Parts/Attachments:
TEXT/PLAIN (65 lines) 
I'd remove ub from your system, it is the low performance USB driver. You
should use usb-storage.

On Wed, 13 Jul 2005, Bill Feero wrote:

> I'm running SL 4.0, and kernel version 2.6.9-11
>
> When I plug in my USB flash disk, I get a constant    kernel: uba: was not changed
> in the log files. (device is not mounted)
>
> When I unplug the flash disk, I get a kernel panic
> Kernel panic - not syncing: drivers/block/ub.c:813: spin_is_locked on uninitialized spinlock da8b5000.
>
> Is there a fix for this?
>
>
> log file snippet follows
>
> Jul 13 11:49:42 bfdcs kernel: ehci_hcd 0000:00:13.2: GetStatus port 2 status 001803 POWER sig=j  CSC CONNECT
> Jul 13 11:49:42 bfdcs kernel: hub 1-0:1.0: port 2, status 0501, change 0001, 480 Mb/s
> Jul 13 11:49:42 bfdcs kernel: hub 1-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x501
> Jul 13 11:49:42 bfdcs kernel: hub 1-0:1.0: port 2 not reset yet, waiting 50ms
> Jul 13 11:49:42 bfdcs kernel: ehci_hcd 0000:00:13.2: port 2 high speed
> Jul 13 11:49:42 bfdcs kernel: ehci_hcd 0000:00:13.2: GetStatus port 2 status 001005 POWER sig=se0  PE CONNECT
> Jul 13 11:49:42 bfdcs kernel: usb 1-2: new high speed USB device using address 2
> Jul 13 11:49:42 bfdcs kernel: ehci_hcd 0000:00:13.2: devpath 2 ep0out 3strikes
> Jul 13 11:49:42 bfdcs kernel: usb 1-2: new device strings: Mfr=1, Product=2, SerialNumber=3
> Jul 13 11:49:42 bfdcs kernel: usb 1-2: default language 0x0409
> Jul 13 11:49:42 bfdcs kernel: usb 1-2: Product: USB 2.0 FD
> Jul 13 11:49:42 bfdcs kernel: usb 1-2: Manufacturer: PNY
> Jul 13 11:49:42 bfdcs kernel: usb 1-2: SerialNumber: 6E530700174E
> Jul 13 11:49:42 bfdcs kernel: usb 1-2: hotplug
> Jul 13 11:49:42 bfdcs kernel: usb 1-2: adding 1-2:1.0 (config #1, interface 0)
> Jul 13 11:49:42 bfdcs kernel: usb 1-2:1.0: hotplug
> Jul 13 11:49:42 bfdcs kernel: ub: sizeof ub_scsi_cmd 60 ub_dev 1020
> Jul 13 11:49:42 bfdcs kernel: ub 1-2:1.0: usb_probe_interface
> Jul 13 11:49:42 bfdcs kernel: ub 1-2:1.0: usb_probe_interface - got id
> Jul 13 11:49:43 bfdcs kernel: uba: device 2 capacity nsec 1003520 bsize 512
> Jul 13 11:49:43 bfdcs kernel: uba: was not changed
> Jul 13 11:49:43 bfdcs kernel:  uba: uba1
> Jul 13 11:49:43 bfdcs kernel: usbcore: registered new driver ub
> Jul 13 11:49:43 bfdcs kernel: uba: was not changed
> Jul 13 11:49:55 bfdcs last message repeated 10 times
> Jul 13 11:49:56 bfdcs kernel: ehci_hcd 0000:00:13.2: GetStatus port 2 status 001002 POWER sig=se0  CSC
> Jul 13 11:49:56 bfdcs kernel: hub 1-0:1.0: port 2, status 0100, change 0001, 12 Mb/s
> Jul 13 11:49:56 bfdcs kernel: usb 1-2: USB disconnect, address 2
> Jul 13 11:49:56 bfdcs kernel: usb 1-2: usb_disable_device nuking all URBs
> Jul 13 11:49:56 bfdcs kernel: usb 1-2: unregistering interface 1-2:1.0
> Jul 13 11:49:56 bfdcs kernel: usb 1-2:1.0: hotplug
> Jul 13 11:49:56 bfdcs kernel: usb 1-2: unregistering device
> Jul 13 11:49:56 bfdcs kernel: usb 1-2: hotplug
> Jul 13 11:49:56 bfdcs kernel: hub 1-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x100
>
> Kernel panic - not syncing: drivers/block/ub.c:813: spin_is_locked on uninitialized spinlock da8b5000.
>
>

--
 /------------------------------------+-------------------------\
|Stephen J. Gowdy                     | SLAC, MailStop 34,       |
|http://www.slac.stanford.edu/~gowdy/ | 2575 Sand Hill Road,     |
|http://calendar.yahoo.com/gowdy      | Menlo Park CA 94025, USA |
|EMail: [log in to unmask]       | Tel: +1 650 926 3144     |
 \------------------------------------+-------------------------/

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