linux-kernel - Re: [PATCH v3, 3/3] usb: dwc3: core: Workaround for CSR read timeout

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Message-ID: <CAMtoTm1_2+oiLeMFLWyUHutAts3=+HLWSKWim6h1vVK9Lq7b8g@mail.gmail.com>
Date: Wed, 12 Jun 2024 20:44:46 +0800
From: joswang <joswang1221@...il.com>
To: Greg KH <gregkh@...uxfoundation.org>
Cc: Thinh.Nguyen@...opsys.com, linux-usb@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Jos Wang <joswang@...ovo.com>
Subject: Re: [PATCH v3, 3/3] usb: dwc3: core: Workaround for CSR read timeout

On Wed, Jun 12, 2024 at 3:58 PM Greg KH <gregkh@...uxfoundation.org> wrote:
>
> On Tue, Jun 11, 2024 at 10:29:53PM +0800, joswang wrote:
> > From: Jos Wang <joswang@...ovo.com>
> >
> > This is a workaround for STAR 4846132, which only affects
> > DWC_usb31 version2.00a operating in host mode.
> >
> > There is a problem in DWC_usb31 version 2.00a operating
> > in host mode that would cause a CSR read timeout When CSR
> > read coincides with RAM Clock Gating Entry. By disable
> > Clock Gating, sacrificing power consumption for normal
> > operation.
> >
> > Signed-off-by: Jos Wang <joswang@...ovo.com>
> > ---
> > v1 -> v2:
> > - add "dt-bindings: usb: dwc3: Add snps,p2p3tranok quirk" patch
> > v2 -> v3:
> > - code refactor
> > - modify comment, add STAR number, workaround applied in host mode
> > - modify commit message, add STAR number, workaround applied in host mode
> > - modify Author Jos Wang
> > ---
> >  drivers/usb/dwc3/core.c | 20 +++++++++++++++++++-
> >  1 file changed, 19 insertions(+), 1 deletion(-)
>
> Should this have a cc: stable line?
>
> thanks,
>
> greg k-h

Thanks for your help in reviewing the code.
In the subsequent v4 version, Cc: stable@...r.kernel.org will be added
to the patch approval area.

Thanks,

Jos Wang