[pvrusb2] Ability to fully reset a PVRUSB2 Device

[Mike Isely]

On Sun, 22 Sep 2019, Mike Isely wrote:

> 
> On Sun, 14 Apr 2019, Diego Rivera wrote:
> 
> > Guinea pig #1 ready, sir! 😂
> > 
> > --
> > 
> > Diego Rivera
> > 
> 
> Diego:
> 
> Going back over this thread and comparing my recent notes, there's a 
> good experiment I'd like you to try:  Get the hardware into a state 
> where you get the "Attempted to execute control transfer when device not 
> ok" infinite log spew.  Once you've confirmed the scenario again, reboot 
> the host and then rename the ir-kbd-i2c.ko module to something which 
> disables it.  You can find this module in the following path:
> 
> /lib/modules/`uname -r`/krtnrl/drivers/media/i2c/

Typo correction:

/lib/modules/`uname -r`/kernel/drivers/media/i2c/

(fingers in wrong position on keyboard, apparently)


> 
> A good thing to do would be to just add "-disabled" to the end of the 
> file name.  Then run "depmod -a" to rebuild the module dependencies 
> (should take a few seconds) and now the ir-kbd-i2c module will be 
> disabled.  On the off-chance that it has already been loaded, also run 
> "modprobe -r ir_kbd_ic2" (or just reboot again).  NOW, run that same 
> scenario where you get the log spew as mentioned above.  Is that still 
> happening?  Also, if it isn't still happening, does "modprobe -r 
> pvrusb2" still get stuck?
> 
> The reason I ask is because that's what I am seeing here.  That 
> ir-kbd-i2c here is the source of the endless stream of failing I2C 
> requests into the pvrusb2 driver.  I want to make sure we're looking at 
> the same bug.  I've got roughly 3 misbehaviors on my plate right now.  
> This is one of them.
> 
> There was an earlier mention of a kernel panic when trying to remove the 
> pvrusb2 driver from the system.  While I am seeing kernel oopses from 
> this - due to sysfs doing something unexpected - it is not panicing.  
> So I have not yet seen that specific problem.  I'd like to know what 
> exact kernel was being run (distro / uname -r output / .config would 
> help too).
> 
>   -Mike
> 
> -- 
> 
> Mike Isely
> isely @ isely (dot) net
> PGP: 03 54 43 4D 75 E5 CC 92 71 16 01 E2 B5 F5 C1 E8
> _______________________________________________
> pvrusb2 mailing list
> pvrusb2 at isely.net
> http://www.isely.net/cgi-bin/mailman/listinfo/pvrusb2
> 

-- 

Mike Isely
isely @ isely (dot) net
PGP: 03 54 43 4D 75 E5 CC 92 71 16 01 E2 B5 F5 C1 E8