[2.6.0-test2-bk5] OHCI USB printing causing system lockup...

From: Daniel Blueman (daniel.blueman@gmx.net)
Date: Wed Aug 06 2003 - 17:31:39 EST

When printing a test page on an Epson C62 through an unpowered USB 1.1 hub,
the printer printed part of the page, then stopped.

The 'error -110' messages were being sent to the syslogs, and after pulling
the connector to the USB hub, the system locked up.

Details below:

--- [printer connected via hub]

Aug 6 23:10:28 stratum kernel: hub 2-2:0: new USB device on port 4,
assigned address 31
Aug 6 23:10:28 stratum kernel: drivers/usb/class/usblp.c: usblp0: USB
Bidirectional printer dev 31 if 0 alt 0 proto 2 vid 0x04B8 pid 0x0005

-- [printing stopped]

Aug 6 23:15:36 stratum kernel: drivers/usb/class/usblp.c: usblp0: error
-110 reading printer status
Aug 6 23:15:36 stratum last message repeated 146 times

--- [pulled USB hub connection, ie disconnect 3 devices + hub]

Aug 6 23:15:36 stratum kernel: usb 2-2: USB disconnect, address 25
Aug 6 23:15:36 stratum kernel: usb 2-2.1: USB disconnect, address 26
Aug 6 23:15:36 stratum kernel: drivers/usb/class/usblp.c: usblp0: error
-110 reading printer status
Aug 6 23:15:36 stratum kernel: drivers/usb/class/usblp.c: usblp0: error
-110 reading printer status
Aug 6 23:15:36 stratum kernel: usb 2-2.2: USB disconnect, address 27
Aug 6 23:15:36 stratum kernel: drivers/usb/class/usblp.c: usblp0: error
-110 reading printer status
Aug 6 23:15:36 stratum kernel: usb 2-2.3: USB disconnect, address 28
Aug 6 23:15:36 stratum kernel: usb 2-2.4: USB disconnect, address 31
Aug 6 23:15:36 stratum kernel: ohci-hcd 0000:00:02.3: ed deee1340 (#0)
state 2(has tds)
Aug 6 23:15:36 stratum kernel: drivers/usb/class/usblp.c: usblp0: error
-108 reading printer status
Aug 6 23:15:36 stratum kernel: usb 2-2.5: USB disconnect, address 29
Aug 6 23:15:39 stratum kernel: drivers/usb/class/usblp.c: usblp0: removed
Aug 6 23:15:39 stratum kernel: Unable to handle kernel paging request at
virtual address df2670e4
Aug 6 23:15:39 stratum kernel: printing eip:
Aug 6 23:15:39 stratum kernel: c02b6a6a
Aug 6 23:15:39 stratum kernel: *pde = 0007b067
Aug 6 23:15:39 stratum kernel: *pte = 1f267000
Aug 6 23:15:39 stratum kernel: Oops: 0000 [#1]
Aug 6 23:15:39 stratum kernel: CPU: 0
Aug 6 23:15:39 stratum kernel: EIP: 0060:[<c02b6a6a>] Not tainted
Aug 6 23:15:39 stratum kernel: EFLAGS: 00010282
Aug 6 23:15:39 stratum kernel: EIP is at usb_buffer_free+0xd/0x46 

-- 
Daniel J Blueman

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