linux-kernel - Re: [PATCH v4, 3/3] usb: dwc3: core: Workaround for CSR read timeout

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Date: Wed, 12 Jun 2024 18:13:21 +0100
From: Conor Dooley <conor@...nel.org>
To: Greg KH <gregkh@...uxfoundation.org>
Cc: joswang <joswang1221@...il.com>, Thinh.Nguyen@...opsys.com,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	stable@...r.kernel.org, Jos Wang <joswang@...ovo.com>
Subject: Re: [PATCH v4, 3/3] usb: dwc3: core: Workaround for CSR read timeout

On Wed, Jun 12, 2024 at 07:04:28PM +0200, Greg KH wrote:
> On Wed, Jun 12, 2024 at 11:39:22PM +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.
> > 
> > Cc: stable@...r.kernel.org
> > Signed-off-by: Jos Wang <joswang@...ovo.com>
> > ---
> > v1 -> v2:
> > - add "dt-bindings: usb: dwc3: Add snps,p2p3tranok quirk" patch,
> >   this patch does not make any changes
> > 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
> > v3 -> v4:
> > - modify commit message, add Cc: stable@...r.kernel.org
> 
> This thread is crazy, look at:
> 	https://lore.kernel.org/all/20240612153922.2531-1-joswang1221@gmail.com/
> for how it looks.  How do I pick out the proper patches to review/apply
> there at all?  What would you do if you were in my position except just
> delete the whole thing?

I usually wouldn't admit to it, cos it means more for Rob or Krzysztof
to look at, but deleting the thread is exactly what I did for the
dt-binding part of it that I got sent.

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