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July 2005

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Subject:
SL 4.0 - unpluging USB flash disk causes a kernel panic
From:
Bill Feero <[log in to unmask]>
Reply To:
Bill Feero <[log in to unmask]>
Date:
Wed, 13 Jul 2005 12:11:02 -0400
Content-Type:
text/plain
Parts/Attachments:
text/plain (54 lines) 
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.

-- 
Bill Feero
Logical Solutions, Inc.

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