linux-kernel - Re: Regression in 5.18.3 from "xhci: Set HCD flag to defer primary roothub registration"

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Message-ID: <YqRFH2i3s/jL28ZG@kroah.com>
Date:   Sat, 11 Jun 2022 09:32:47 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Christian Hewitt <christianshewitt@...il.com>
Cc:     Kishon Vijay Abraham I <kishon@...com>,
        Mathias Nyman <mathias.nyman@...ux.intel.com>,
        Chris Chiu <chris.chiu@...onical.com>,
        linux-usb@...r.kernel.org, linux-amlogic@...ts.infradead.org,
        stable@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        Neil Armstrong <narmstrong@...libre.com>
Subject: Re: Regression in 5.18.3 from "xhci: Set HCD flag to defer primary
 roothub registration"

On Sat, Jun 11, 2022 at 10:49:23AM +0400, Christian Hewitt wrote:
> Commit 6c64a664e1cff339ec698d803fa8cbb9af5d95ce “xhci: Set HCD flag to defer
> primary roothub registration” added for Linux 5.18.3 caused a regression on
> some Amlogic S912 devices (original user forum report with an Android TV box
> and confirmed with a Khadas VIM2 board). I do not see issues with older S905
> (WeTeK Play2) or newer S922X (Odroid N2+) devices running the same kernel.
> There are no kernel splats or error messages but lsusb shows no output and
> nothing works. Simple revert restores the previous good working behaviour.
> 
> dmesg with commit http://ix.io/3ZTv
> dmesg with revert http://ix.io/3ZTw
> 
> I’m not a coder so will need to be fed instructions to assist with debugging
> the issue further if you don't have access to an Amlogic S912 device. I can
> share devices online for remote poking around if needed.

Does 5.19-rc1 also have this problem?

thanks,

greg k-h