> OTOH I tend to agree with people saying module use count==0 indicates the
> module is unused and thus can be safely removed. Personally I'd expect the
> hcd's use count to increase with every interface claimed by client driver.
>
> Thoughts?
usb_hcd_pci_remove should run and cause a disconnect of your storage device.
> $ rmmod ohci_hcd
>
> ohci-hcd 0000:00:01.2: remove, state 3
> usb usb1: USB disconnect, address 1
> usb 1-1: USB disconnect, address 2
> ohci-hcd 0000:00:01.2: USB bus 1 deregistered
And indeed it does run.
> $ ls /mnt/usbstick
>
> ------------[ cut here ]------------
> kernel BUG at fs/buffer.c:1165!
> invalid operand: 0000 [#1]
> CPU: 0
> EIP: 0060:[<c015ca8a>] Not tainted
> EFLAGS: 00010206
> EIP is at __getblk_slow+0x4a/0xf0
> eax: 00006b6a ebx: 000001f7 ecx: 0000003e edx: c88e2688
> esi: 00000200 edi: cbd2aa24 ebp: 000001f7 esp: c77c7c74
> ds: 007b es: 007b ss: 0068
> Process bash (pid: 1560, threadinfo=c77c6000 task=c8a2e080)
> Stack: 00000200 000001f7 cbd2aa24 00000000 c015cef6 cbd2aa24 000001f7 00000200
> c774d49c 00000000 00000000 c015cf51 cbd2aa24 000001f7 00000200 cd0dd54f
> cbd2aa24 000001f7 00000200 c77c7cc8 c7a03104 000001f7 c0364bc0 cbfb83e0
> Call Trace:
> [<c015cef6>] __getblk+0x26/0x30
Here probably the block or scsi layer is to blame.
What happens if you unplug the memory stick?
Regards
Oliver
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