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Date: Tue, 16 Jan 2024 11:54:37 +0100
From: Johan Hovold <johan@kernel.org>
To: Konrad Dybcio <konrad.dybcio@linaro.org>
Cc: Krishna chaitanya chundru <quic_krichai@quicinc.com>,
	Bjorn Andersson <andersson@kernel.org>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Lorenzo Pieralisi <lpieralisi@kernel.org>,
	Krzysztof =?utf-8?Q?Wilczy=C5=84ski?= <kw@linux.com>,
	Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Conor Dooley <conor+dt@kernel.org>,
	Manivannan Sadhasivam <mani@kernel.org>,
	Rob Herring <robh+dt@kernel.org>,
	Johan Hovold <johan+linaro@kernel.org>,
	Brian Masney <bmasney@redhat.com>,
	Georgi Djakov <djakov@kernel.org>, linux-arm-msm@vger.kernel.org,
	vireshk@kernel.org, quic_vbadigan@quicinc.com,
	quic_skananth@quicinc.com, quic_nitegupt@quicinc.com,
	linux-pci@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, stable@vger.kernel.org
Subject: Re: [PATCH v6 3/6] PCI: qcom: Add missing icc bandwidth vote for cpu
 to PCIe path
Message-ID: <ZaZgba6wSMtuHz7i@hovoldconsulting.com>
References: <20240112-opp_support-v6-0-77bbf7d0cc37@quicinc.com>
 <20240112-opp_support-v6-3-77bbf7d0cc37@quicinc.com>
 <ZaFhzOCTpZYlAh60@hovoldconsulting.com>
 <c278d89d-4eba-4ea7-8cf5-6b1de90dedbe@linaro.org>
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In-Reply-To: <c278d89d-4eba-4ea7-8cf5-6b1de90dedbe@linaro.org>

On Fri, Jan 12, 2024 at 11:37:03PM +0100, Konrad Dybcio wrote:
> On 12.01.2024 16:59, Johan Hovold wrote:
> > On Fri, Jan 12, 2024 at 07:52:02PM +0530, Krishna chaitanya chundru wrote:
> >> CPU-PCIe path consits for registers PCIe BAR space, config space.
> > 
> > consits?
> > 
> >> As there is less access on this path compared to pcie to mem path
> >> add minimum vote i.e GEN1x1 bandwidth always.
> > 
> > gen1 bandwidth can't be right.
> > 
> >> In suspend remove the cpu vote after register space access is done.
> >>
> >> Fixes: c4860af88d0c ("PCI: qcom: Add basic interconnect support")
> >> cc: stable@vger.kernel.org
> > 
> > This does not look like a fix so drop the above.
> > 
> > The commit you refer to explicitly left this path unconfigured for now
> > and only added support for the configuring the mem path as needed on
> > sc8280xp which otherwise would crash.
> 
> I only sorta agree. I'd include a fixes tag but point it to either 8450
> addition or original driver introduction, as this is patching up a real
> hole (see my reply to Bryan).

Right, the above Fixes tag is not correct in any case.

And with a complete commit message it may be possible to tell whether
a Fixes tag is warranted or not.

Johan