linux-kernel - Re: [PATCH 5.13 024/800] usb: renesas-xhci: Fix handling of unknown ROM state

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Date:   Mon, 19 Jul 2021 10:28:57 -0500
From:   Justin Forbes <jmforbes@...uxtx.org>
To:     Moritz Fischer <mdf@...nel.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Stable <stable@...r.kernel.org>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Vinod Koul <vkoul@...nel.org>
Subject: Re: [PATCH 5.13 024/800] usb: renesas-xhci: Fix handling of unknown
 ROM state

On Sat, Jul 17, 2021 at 2:48 PM Moritz Fischer <mdf@...nel.org> wrote:
>
> On Sat, Jul 17, 2021 at 07:34:51PM +0200, Greg Kroah-Hartman wrote:
> > On Sat, Jul 17, 2021 at 08:39:19AM -0500, Justin Forbes wrote:
> > > On Mon, Jul 12, 2021 at 2:31 AM Greg Kroah-Hartman
> > > <gregkh@...uxfoundation.org> wrote:
> > > >
> > > > From: Moritz Fischer <mdf@...nel.org>
> > > >
> > > > commit d143825baf15f204dac60acdf95e428182aa3374 upstream.
> > > >
> > > > The ROM load sometimes seems to return an unknown status
> > > > (RENESAS_ROM_STATUS_NO_RESULT) instead of success / fail.
> > > >
> > > > If the ROM load indeed failed this leads to failures when trying to
> > > > communicate with the controller later on.
> > > >
> > > > Attempt to load firmware using RAM load in those cases.
> > > >
> > > > Fixes: 2478be82de44 ("usb: renesas-xhci: Add ROM loader for uPD720201")
> > > > Cc: stable@...r.kernel.org
> > > > Cc: Mathias Nyman <mathias.nyman@...el.com>
> > > > Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> > > > Cc: Vinod Koul <vkoul@...nel.org>
> > > > Tested-by: Vinod Koul <vkoul@...nel.org>
> > > > Reviewed-by: Vinod Koul <vkoul@...nel.org>
> > > > Signed-off-by: Moritz Fischer <mdf@...nel.org>
> > > > Link: https://lore.kernel.org/r/20210615153758.253572-1-mdf@kernel.org
> > > > Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> > > >
> > >
> > > After sending out 5.12.17 for testing, we had a user complain that all
> > > of their USB devices disappeared with the error:
> > >
> > > Jul 15 23:18:53 kernel: xhci_hcd 0000:04:00.0: Direct firmware load
> > > for renesas_usb_fw.mem failed with error -2
> > > Jul 15 23:18:53 kernel: xhci_hcd 0000:04:00.0: request_firmware failed: -2
> > > Jul 15 23:18:53 kernel: xhci_hcd: probe of 0000:04:00.0 failed with error -2
> > >
> > > After first assuming that something was missing in the backport to
> > > 5.12, I had the user try 5.13.2, and then 5.14-rc1. Both of those
> > > failed in the same way, so it is not working in the current Linus tree
> > > either.  Reverting this patch fixed the issue.
> >
> > Can you send a revert for this so I can get that into Linus's tree and
> > then all stable releases as well?
> >
> > thanks,
> >
> > greg k-h
>
> Me or Justin? I can do it. This is annoying my system doesn't work
> without this :-(
>
> Back to the drawing board I guess ...
>
> Justin, any idea if your customer had the eeprom populated and
> programmed or not, just as additional datapoint.

I am not sure, but I did have another user chime in on the bug saying
the test kernel with the revert fixed their system as well. It was a
T14s AMD
Generation_1. The original reporter had a ASUS System Product
Name/PRIME H370M-PLUS, BIOS 2801 04/13/2021.

Justin

> - Moritz