linux-kernel - Re: [PATCH v6 3/6] PCI: qcom: Add missing icc bandwidth vote for cpu to PCIe path

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Date: Fri, 12 Jan 2024 15:17:28 +0000
From: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To: Krishna chaitanya chundru <quic_krichai@...cinc.com>,
 Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konrad.dybcio@...aro.org>, Bjorn Helgaas
 <bhelgaas@...gle.com>, Lorenzo Pieralisi <lpieralisi@...nel.org>,
 Krzysztof Wilczyński <kw@...ux.com>,
 Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Manivannan Sadhasivam <mani@...nel.org>,
 Rob Herring <robh+dt@...nel.org>, Johan Hovold <johan+linaro@...nel.org>,
 Brian Masney <bmasney@...hat.com>, Georgi Djakov <djakov@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, vireshk@...nel.org,
 quic_vbadigan@...cinc.com, quic_skananth@...cinc.com,
 quic_nitegupt@...cinc.com, linux-pci@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 stable@...r.kernel.org
Subject: Re: [PATCH v6 3/6] PCI: qcom: Add missing icc bandwidth vote for cpu
 to PCIe path

On 12/01/2024 14:22, Krishna chaitanya chundru wrote:
> CPU-PCIe path consits for registers PCIe BAR space, config space.
> As there is less access on this path compared to pcie to mem path
> add minimum vote i.e GEN1x1 bandwidth always.
> 
> In suspend remove the cpu vote after register space access is done.
> 
> Fixes: c4860af88d0c ("PCI: qcom: Add basic interconnect support")

If this patch is a Fixes then don't you need the accompanying dts change 
as a parallel Fixes too ?

i.e. without the dts update - you won't have the nodes in the dts to 
consume => applying this code to the stable kernel absent the dts will 
result in no functional change and therefore no bugfix.

I'm not sure if you are asked to put a Fixes here but it seems to be it 
should either be dropped or require a parallel Fixes: tag for the dts 
and yaml changes.

What is the bug this change fixes in the backport ?

> cc: stable@...r.kernel.org
> Signed-off-by: Krishna chaitanya chundru <quic_krichai@...cinc.com>

---
bod