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

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Date: Tue, 18 Jun 2024 00:05:05 +0000
From: Thinh Nguyen <Thinh.Nguyen@...opsys.com>
To: joswang <joswang1221@...il.com>
CC: Greg KH <gregkh@...uxfoundation.org>,
        Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...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 Thu, Jun 13, 2024, joswang wrote:
> On Thu, Jun 13, 2024 at 1:04 AM Greg KH <gregkh@...uxfoundation.org> 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://urldefense.com/v3/__https://lore.kernel.org/all/20240612153922.2531-1-joswang1221@gmail.com/__;!!A4F2R9G_pg!a29V9NsG_rMKPnub-JtIe5I_lAoJmzK8dgo3UK-qD_xpT_TOgyPb6LkEMkIsijsDKIgdxB_QVLW_MwtdQLnyvOujOA$ 
> > 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?
> >
> > Just properly submit new versions of patches (hint, without the ','), as
> > the documentation file says to, as new threads each time, with all
> > commits, and all should be fine.
> >
> > We even have tools that can do this for you semi-automatically, why not
> > use them?
> >
> > thanks,
> >
> > greg k-h
> 
> We apologize for any inconvenience this may cause.
> The following incorrect operation caused the problem you mentioned:
> git send-email --in-reply-to command sends the new version patch
> git format-patch --subject-prefix='PATCH v3
> 
> Should I resend the v5 patch now?

Please send this as a stand-alone patch outside of the series as v5. (ie.
remove the "3/3"). I still need to review the other issue of the series.

Thanks,
Thinh