USB Flash drive gets a new device every time

[Vadim <lkml@vadim.ws>]

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This is happening right now and is 100% reproducible on two 
computers.

First computer is a dual Athlon MP 2000+, running the Gentoo 
2.4.20-gentoo-r7 kernel. The second one is a Toshiba 470CDT 
laptop running the 2.4.22 vanilla kernel.

The laptop currently doesn't have a working network card so I'm 
using a PQI TravelFlash card reader to exchange data.

The problem is that every time I remove the card reader and 
insert it again it gets a new device. The old ones remain in 
/proc/partitions and get set to 1GB size if I try to access 
them. Otherwise they remain showing the 64MB of the removed card 
reader.

For example, on the Athlon, /proc/partitions looks like this 
after inserting and removing the card several times:

   8     0    1048575 scsi/host1/bus0/target0/lun0/disc 2 6 16 0 
0 0 0 0 0 0 0
   8    16      61440 scsi/host1/bus0/target0/lun1/disc 160 6 174 
484 23 4012 4035 26798 0 2866 27282
   8    17      61375 scsi/host1/bus0/target0/lun1/part1 159 3 
166 478 23 4012 4035 26798 0 2860 27276
   8    32    1048575 scsi/host1/bus0/target0/lun2/disc 2 6 16 0 
0 0 0 0 0 0 0
   8    48    1048575 scsi/host1/bus0/target0/lun3/disc 2 6 16 0 
0 0 0 0 0 0 0
   8    64    1048575 scsi/host2/bus0/target0/lun0/disc 2 6 16 0 
0 0 0 0 0 0 0
   8    80      61440 scsi/host2/bus0/target0/lun1/disc 1 3 8 6 0 
0 0 0 0 6 6
   8    81      61375 scsi/host2/bus0/target0/lun1/part1 0 0 0 0 
0 0 0 0 0 0 0
   8    96    1048575 scsi/host2/bus0/target0/lun2/disc 2 6 16 0 
0 0 0 0 0 0 0
   8   112    1048575 scsi/host2/bus0/target0/lun3/disc 2 6 16 0 
0 0 0 0 0 0 0
   8   128    1048575 scsi/host3/bus0/target0/lun0/disc 2 6 16 0 
0 0 0 0 0 0 0
   8   144      61440 scsi/host3/bus0/target0/lun1/disc 1 3 8 6 0 
0 0 0 0 6 6
   8   145      61375 scsi/host3/bus0/target0/lun1/part1 0 0 0 0 
0 0 0 0 0 0 0

I have also noticed that in /proc/scsi/ there is a usb-storage-N 
directory created every time I insert the card reader, with the 
file inside having a content like:

   Host scsi2: usb-storage
       Vendor: Generic
      Product: USB Storage Device
Serial Number: 0AEC305000001A006
     Protocol: Transparent SCSI
    Transport: Bulk
         GUID: 0aec5010aec305000001a006
     Attached: No

Only the last one has 'Attached' set to 'Yes':

   Host scsi4: usb-storage
       Vendor: Generic
      Product: USB Storage Device
Serial Number: 0AEC305000001A008
     Protocol: Transparent SCSI
    Transport: Bulk
         GUID: 0aec5010aec305000001a008
     Attached: Yes

I'm guessing the kernel is keeping it there for some reason, but 
I can't figure out why. I guess it might be trying to allow to 
reinsert a device later, but if so, it's definitely not working.

Here are the USB lines from .config for the laptop.
CONFIG_USB=y
CONFIG_USB_DEBUG=y
CONFIG_USB_DEVICEFS=y
CONFIG_USB_OHCI=y
CONFIG_USB_STORAGE=y
CONFIG_USB_STORAGE_DATAFAB=y
CONFIG_USB_STORAGE_FREECOM=y
CONFIG_USB_STORAGE_ISD200=y
CONFIG_USB_STORAGE_DPCM=y
CONFIG_USB_STORAGE_SDDR09=y
CONFIG_USB_STORAGE_SDDR55=y
CONFIG_USB_STORAGE_JUMPSHOT=y
CONFIG_USB_PWC=y
CONFIG_USB_USBNET=y


Perhaps I'm missing something obvious here, but I googled for 
this and didn't find anything. Other people seem to have had 
this problem, but I haven't found any answers.

Thanks in advance

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