[Bug 221184] mouse/keyboard (connected via hub) usb reset under system load with weak cpu

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=221184

Michał Pecio (michal.pecio@gmail.com) changed:

           What    |Removed                     |Added
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                 CC|                            |michal.pecio@gmail.com

--- Comment #28 from Michał Pecio (michal.pecio@gmail.com) ---
(In reply to Roman Elshin from comment #17)
> reverting 64cc3f12d1c7dd054a215bc1ff9cc2abcfe35832 greatly improve usability
> -
> it fixes mouse resets, keyboard resets still here, but it makes it mach rare.
Does this commit change anything besides returning EPROTO vs EPIPE?

What difference does it make for usbhid? Maybe it tries usb_clear_halt()?

(In reply to Roman Elshin from comment #22)
> just made a quick test with several pci-e usb cards what i have
All of these are USB 3.0 and use xhci_hcd driver instead of ehci_hcd, which is
a separate can of worms (also bugs). Resubmitting without usb_clear_halt()
gives 50% chance of toggle mismatch and losing the next packet on bulk EPs;
AFAIK interrupt would do the same. And in some cases usb_clear_halt() may not
work either.

Were you testing with devices behind a high-speed hub, or a full-speed hub, or
connected directly to the card? BTW, VL805 contains a built-in HS hub.

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