[pvrusb2] Ability to fully reset a PVRUSB2 Device

[isely at isely.net]

Status update.  Nothing really useful to report except that I am seeing 
some screwy behavior just on hotplug / hotunplug operations with the 
device just sitting idle not being touched by anything.  In this case I 
tested an old 29032 model - a very early module but it's a useful test 
subject because it is simpler than the HVR-1950 yet still exercises most 
of the key pieces of the driver.  I ran a freshly compiled 5.0.9 kernel 
(latest stable) for this test.

Sorry this has taken so long.  As was guessed earlier, I haven't worked 
on this in a very long time and I had to unbox a lot of stuff.  I also 
spent far too much time today setting up a separate purpose-built 
computer which I can trash / crash / hang with wild abandon without 
losing anything of value.  This approach allows me to keep my dev 
environment on a machine separate from the one that is running test 
kernels.

I was able to cleanly modprobe -r pvrusb2 every time so far, but if the 
issue is on the DVB side of the fence, then the old 29032 model I've 
just tried won't exhibit that issue.  So a lot more characterization to 
do.

Diego: It would useful if you could post to me the section of your 
/var/log/kern.log (or equivalent) should all the kernel messages from 
the point when you plug in the device to when the fireworks are 
happening after trying to tear down.  If I find that same pattern here 
then we'll know for sure that we are chasing the same issue.

  -Mike

-- 

Mike Isely
isely @ isely (dot) net
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