[PATCH 0/4] Fix problems on disconnected devices in 7.3

[Michal Pecio <michal.pecio@gmail.com>]

On Wed, 28 Oct 2026 08:07:34 +0100, Michal Pecio wrote:
> Anyway, I think it all can be done with a bit less code, while also
> handling disconnection during unlink. Particularly on EP0, multiple
> URBs may be submitted by different drivers and/or userspace. Just
> because one of them unlinks its URB doesn't mean that the others are
> aware of anything being wrong and won't stall for <N> seconds.
> 
> This below is a rudimentarily tested RFC but it seems to work. It's
> simple enough that hopefully it might even be correct. I will test it
> more and write a changelog later today if there are no objections.
> 
> I tweaked the logic to return everything with -ESHUTDOWN and not
> bother to assign proper status to the URB which halted. Intuition:
> we want them to give up, not call clear_halt() or reset_device().

Actually, wouldn't this break the "resuscitation" feature? Does anyone
depend on it? Hell knows... I changed to give back the halted URB with
normal status and ended up with similar code as everyone else, but in
different places, so that URBs should also be flushed on unlink now.
Took a little longer than I hoped.

Is the last patch 4/4 necessary in practice? I guess it probably is.

As for disconnection of USB3 NICs from Renesas, that still works
without hanging the HC. In fact, we could even Reset EP and Set Deq
on the interrupt endpoint and nothing happens if it's not restarted,
but these patches here only clean up EP0.

Regards,
Michal