linux-kernel - Re: [PATCH v1 1/2] PCI: qcom: Add system PM support

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Date:   Fri, 24 Jun 2022 11:31:30 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Krishna chaitanya chundru <quic_krichai@...cinc.com>
Cc:     helgaas@...nel.org, linux-pci@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        quic_vbadigan@...cinc.com, quic_hemantk@...cinc.com,
        quic_nitegupt@...cinc.com, quic_skananth@...cinc.com,
        quic_ramkri@...cinc.com, manivannan.sadhasivam@...aro.org,
        swboyd@...omium.org, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Stanimir Varbanov <svarbanov@...sol.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>
Subject: Re: [PATCH v1 1/2] PCI: qcom: Add system PM support

On Fri, Jun 24, 2022 at 12:58:01PM +0530, Krishna chaitanya chundru wrote:
> Add suspend and resume pm callbacks.
> 
> When system suspends, and if the link is in L1ss, disable the clocks
> so that system enters into low power state to save the maximum power.
> And when the system resumes, enable the clocks back if they are
> disabled in the suspend path.
> 
> Signed-off-by: Krishna chaitanya chundru <quic_krichai@...cinc.com>

On which tree is this series based on?

With v5.19-rc3 I get:

  CC      drivers/pci/controller/dwc/pcie-qcom.o
/mnt/host/source/src/third_party/kernel/v5.15/drivers/pci/controller/dwc/pcie-qcom.c:1658:26: error: cannot assign to non-static data member 'cfg' with const-qualified type 'const struct qcom_pcie_cfg *'
        pcie->cfg->is_suspended = false;
        ~~~~~~~~~~~~~~~~~~~~~~~ ^
/mnt/host/source/src/third_party/kernel/v5.15/drivers/pci/controller/dwc/pcie-qcom.c:218:30: note: non-static data member 'cfg' declared const here
        const struct qcom_pcie_cfg *cfg;
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
/mnt/host/source/src/third_party/kernel/v5.15/drivers/pci/controller/dwc/pcie-qcom.c:1721:2: error: use of undeclared identifier 'val'
        val = readl(pcie->parf + PCIE20_PARF_PM_STTS);
        ^
/mnt/host/source/src/third_party/kernel/v5.15/drivers/pci/controller/dwc/pcie-qcom.c:1722:8: error: use of undeclared identifier 'val'
        if (!(val & PCIE20_PARF_PM_STTS_LINKST_IN_L1SUB)) {
              ^
/mnt/host/source/src/third_party/kernel/v5.15/drivers/pci/controller/dwc/pcie-qcom.c:1733:26: error: cannot assign to non-static data member 'cfg' with const-qualified type 'const struct qcom_pcie_cfg *'
        pcie->cfg->is_suspended = true;
        ~~~~~~~~~~~~~~~~~~~~~~~ ^
/mnt/host/source/src/third_party/kernel/v5.15/drivers/pci/controller/dwc/pcie-qcom.c:218:30: note: non-static data member 'cfg' declared const here
        const struct qcom_pcie_cfg *cfg;
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
/mnt/host/source/src/third_party/kernel/v5.15/drivers/pci/controller/dwc/pcie-qcom.c:1749:9: error: no member named 'ops' in 'struct qcom_pcie'
                pcie->ops->enable_clks(pcie);
                ~~~~  ^
/mnt/host/source/src/third_party/kernel/v5.15/drivers/pci/controller/dwc/pcie-qcom.c:1752:9: error: no member named 'ops' in 'struct qcom_pcie'
                pcie->ops->post_init(pcie);
                ~~~~  ^
/mnt/host/source/src/third_party/kernel/v5.15/drivers/pci/controller/dwc/pcie-qcom.c:1754:26: error: cannot assign to non-static data member 'cfg' with const-qualified type 'const struct qcom_pcie_cfg *'
        pcie->cfg->is_suspended = false;
        ~~~~~~~~~~~~~~~~~~~~~~~ ^
/mnt/host/source/src/third_party/kernel/v5.15/drivers/pci/controller/dwc/pcie-qcom.c:218:30: note: non-static data member 'cfg' declared const here
        const struct qcom_pcie_cfg *cfg;
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
7 errors generated.