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From: Stephen Boyd <swboyd@chromium.org>
To: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Mike Tipton <mdtipton@codeaurora.org>,
	djakov@kernel.org, agross@kernel.org, saravanak@google.com,
	okukatla@codeaurora.org, linux-pm@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
	Alex Elder <elder@linaro.org>
Subject: Re: [PATCH v2 4/4] interconnect: qcom: icc-rpmh: Add BCMs to commit list in pre_aggregate
Date: Tue, 10 Aug 2021 21:22:29 -0700	[thread overview]
Message-ID: <CAE-0n53L_muNfpcunPmAWh-dG1h_y8xVqUG-es2CY8jdbnM8mg@mail.gmail.com> (raw)
In-Reply-To: <YRMXOlA5a98BwT3i@builder.lan>

Quoting Bjorn Andersson (2021-08-10 17:18:02)
> On Tue 10 Aug 18:31 CDT 2021, Stephen Boyd wrote:
>
> > Quoting Mike Tipton (2021-07-21 10:54:32)
> > > We're only adding BCMs to the commit list in aggregate(), but there are
> > > cases where pre_aggregate() is called without subsequently calling
> > > aggregate(). In particular, in icc_sync_state() when a node with initial
> > > BW has zero requests. Since BCMs aren't added to the commit list in
> > > these cases, we don't actually send the zero BW request to HW. So the
> > > resources remain on unnecessarily.
> > >
> > > Add BCMs to the commit list in pre_aggregate() instead, which is always
> > > called even when there are no requests.
> > >
> > > Fixes: 976daac4a1c5 ("interconnect: qcom: Consolidate interconnect RPMh support")
> > > Signed-off-by: Mike Tipton <mdtipton@codeaurora.org>
> > > ---
> >
> > This patch breaks reboot for me on sc7180 Lazor
> >
>
> FWIW, it prevents at least SM8150 from booting (need to check my other
> boards as well), because its no longer okay to have the interconnect
> providers defined without having all client paths specified.

So maybe the best course of action is to revert this patch from Linus'
tree? It's not a super huge deal as "can't boot", but certainly makes
reboot annoying on sc7180.

  reply	other threads:[~2021-08-11  4:22 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-21 17:54 [PATCH v2 0/4] interconnect: Fix sync-state issues Mike Tipton
2021-07-21 17:54 ` [PATCH v2 1/4] interconnect: Zero initial BW after sync-state Mike Tipton
2021-07-21 17:54 ` [PATCH v2 2/4] interconnect: Always call pre_aggregate before aggregate Mike Tipton
2021-07-21 17:54 ` [PATCH v2 3/4] interconnect: qcom: icc-rpmh: Ensure floor BW is enforced for all nodes Mike Tipton
2021-07-21 17:54 ` [PATCH v2 4/4] interconnect: qcom: icc-rpmh: Add BCMs to commit list in pre_aggregate Mike Tipton
2021-08-10 23:31   ` Stephen Boyd
2021-08-11  0:18     ` Bjorn Andersson
2021-08-11  4:22       ` Stephen Boyd [this message]
2021-08-18  4:43       ` Mike Tipton
2021-08-11 16:01     ` Alex Elder
2021-08-11 18:13       ` Stephen Boyd
2021-08-18  4:43         ` Mike Tipton

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