linux-kernel - Re: [PATCH AUTOSEL 6.7 044/108] usb: typec: ucsi: fix UCSI on buggy Qualcomm devices

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Message-ID: <CAA8EJpoQZc0f2HusJOMa_45bh8Eh=sVg-aOUbNR3S0+oQQQ+MQ@mail.gmail.com>
Date: Wed, 17 Jan 2024 14:17:40 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Johan Hovold <johan@...nel.org>
Cc: Sasha Levin <sashal@...nel.org>, linux-kernel@...r.kernel.org, stable@...r.kernel.org, 
	Heikki Krogerus <heikki.krogerus@...ux.intel.com>, 
	Neil Armstrong <neil.armstrong@...aro.org>, Bjorn Andersson <andersson@...nel.org>, 
	gregkh@...uxfoundation.org, hdegoede@...hat.com, fabrice.gasnier@...s.st.com, 
	quic_jackp@...cinc.com, saranya.gopal@...el.com, quic_linyyuan@...cinc.com, 
	andriy.shevchenko@...ux.intel.com, minhuadotchen@...il.com, 
	johan+linaro@...nel.org, robh@...nel.org, linux-usb@...r.kernel.org
Subject: Re: [PATCH AUTOSEL 6.7 044/108] usb: typec: ucsi: fix UCSI on buggy
 Qualcomm devices

On Wed, 17 Jan 2024 at 10:03, Johan Hovold <johan@...nel.org> wrote:
>
> On Tue, Jan 16, 2024 at 02:39:10PM -0500, Sasha Levin wrote:
> > From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> >
> > [ Upstream commit 1d103d6af241dbfc7e11eb9a46dff65db257a37f ]
> >
> > On sevral Qualcomm platforms (SC8180X, SM8350, SC8280XP) a call to
> > UCSI_GET_PDOS for non-PD partners will cause a firmware crash with no
> > easy way to recover from it. Since we have no easy way to determine
> > whether the partner really has PD support, shortcut UCSI_GET_PDOS on
> > such platforms. This allows us to enable UCSI support on such devices.
> >
> > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> > Acked-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
> > Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>
> > Link: https://lore.kernel.org/r/20231025115620.905538-2-dmitry.baryshkov@linaro.org
> > Signed-off-by: Bjorn Andersson <andersson@...nel.org>
> > Signed-off-by: Sasha Levin <sashal@...nel.org>
>
> Correct me if I'm wrong Dmitry, but while the commit message makes this
> sound like a fix, it is not needed unless you backport follow-on patches
> that enable UCSI on these platforms.
>
> So this one can be dropped from all stable queues (unless you're
> backporting patches that enable new features and that depend on this
> one).

Exactly. It didn't have the Fixes: tag. So I'm completely unsure why
it ended up in the autosel queue at all.

-- 
With best wishes
Dmitry