On Tue, 2006-03-14 at 10:42 -0500, Alan Stern wrote:
> Psul, the best way to approach a problem like this is by massive debugging 
> printks.

That's what I have been doing, and I just posted another
such patch for Bob to test. I don't have any of the
equipment to test this myself, so I am relying on
Bob's willingness to continue.

Here was some earlier output.

acm_tty_open tty=cd254af8 acm=ce24eca0 acm->used=00000000
PPP BSD Compression module registered
PPP Deflate Compression module registered
usb 1-2: USB disconnect, address 6
acm_disconnect intf=ce99f720 acm=ce24eca0 usb_dev=ce24f4b8
acm_disconnect acm->used=1 acm->dev=ce24f4b8 acm->tty=cd254af8
acm_disconnect intf=cefb6760 acm=00000000 usb_dev=ce24f4b8
acm_tty_close tty=cd254af8 filp=ce96511c acm=ce24eca0
acm_tty_close acm->used=1 acm->dev=00000000
Unable to handle kernel paging request at virtual address 6b6b6bfb

My last post does ref checking before and after calling
the tty register/unregister functions.

-- 
Paul Fulghum
Microgate Systems, Ltd



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