USB flash card reader

From: Brian May (bam@snoopy.apana.org.au)
Date: Wed Aug 29 2001 - 00:38:48 EST


Hello,

I have a usb-storage.o USB device, that to /proc/bus/usb/devices looks
like this:

T: Bus=01 Lev=02 Prnt=03 Port=01 Cnt=02 Dev#= 7 Spd=12 MxCh= 0
D: Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=0781 ProdID=0001 Rev= 2.00
S: Manufacturer=SanDisk Corporation
S: Product=SanDisk USB ImageMate
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=100mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=usb-storage
E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=83(I) Atr=03(Int.) MxPS= 2 Ivl=255ms

When "mount /dev/camera" has been entered, the first time it complains
that it can't find the device (something funny with hotplug here). So
I unplug the USB device and plug it back in again. This is normal.

Now, the same mount command in entered, the process hangs in kernel
mode (so kill -9 will not work). Furthermore, the computer hangs when
shutting down, making a clean shutdown impossible. (Or perhaps I am
just being too impatient and not waiting longer enough for something
to timeout?)

Only problem is that when I go to reproduce this problem with/without
strace, it works!

As far as I know the only potentially serious mistakes the user could
make are unplugging the USB device or removing the flash card when it
is mounted, but as far as I am aware, neither of those cases apply
here.

Any ideas?

Only problem is that I have been telling others how reliable and
robust Linux is, but what does it do, but crash! Argghh!

-- 
Brian May <bam@snoopy.apana.org.au>
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This archive was generated by hypermail 2b29 : Fri Aug 31 2001 - 21:00:32 EST