linux-kernel - Re: [PATCH] PCI: qcom: Drop unused post-init callbacks

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Date:   Mon, 20 Jun 2022 18:29:17 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Johan Hovold <johan+linaro@...nel.org>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Stanimir Varbanov <svarbanov@...sol.com>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        linux-arm-msm@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] PCI: qcom: Drop unused post-init callbacks

On Mon, 20 Jun 2022 at 18:19, Johan Hovold <johan+linaro@...nel.org> wrote:
>
> Drop the unused post_init and post_deinit callbacks that were added for
> the now removed pipe clock handling.

I think the IPQ60xx PCIe support is intended to use post_init
callback. See [1]. That is the reason why I left the post_init in
place, while reworking the pipe clocks handling.

[1] https://lore.kernel.org/linux-arm-msm/a470b27a642d21e7b3e64d0f3287c0c3521bd182.1655028401.git.baruch@tkos.co.il/

> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
> ---
>
> Now that Bjorn has merged the pipe clock series:
>
>         https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git/log/?h=pci/ctrl/qcom
>
> the post_init and post_deinit callbacks can also be removed.
>
> Note that this one depends on the patch adding support for modular
> builds:
>
>         https://lore.kernel.org/all/20220519094646.23009-1-johan+linaro@kernel.org/
>
> which has been reviewed by Rob and should be ready to be picked up.
>
> Johan
>
>
>  drivers/pci/controller/dwc/pcie-qcom.c | 17 ++---------------
>  1 file changed, 2 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
> index ff1b40f213c1..fe701da32119 100644
> --- a/drivers/pci/controller/dwc/pcie-qcom.c
> +++ b/drivers/pci/controller/dwc/pcie-qcom.c
> @@ -180,9 +180,7 @@ struct qcom_pcie;
>  struct qcom_pcie_ops {
>         int (*get_resources)(struct qcom_pcie *pcie);
>         int (*init)(struct qcom_pcie *pcie);
> -       int (*post_init)(struct qcom_pcie *pcie);
>         void (*deinit)(struct qcom_pcie *pcie);
> -       void (*post_deinit)(struct qcom_pcie *pcie);
>         void (*ltssm_enable)(struct qcom_pcie *pcie);
>         int (*config_sid)(struct qcom_pcie *pcie);
>  };
> @@ -1331,27 +1329,18 @@ static int qcom_pcie_host_init(struct pcie_port *pp)
>         if (ret)
>                 goto err_deinit;
>
> -       if (pcie->cfg->ops->post_init) {
> -               ret = pcie->cfg->ops->post_init(pcie);
> -               if (ret)
> -                       goto err_disable_phy;
> -       }
> -
>         qcom_ep_reset_deassert(pcie);
>
>         if (pcie->cfg->ops->config_sid) {
>                 ret = pcie->cfg->ops->config_sid(pcie);
>                 if (ret)
> -                       goto err;
> +                       goto err_assert_reset;
>         }
>
>         return 0;
>
> -err:
> +err_assert_reset:
>         qcom_ep_reset_assert(pcie);
> -       if (pcie->cfg->ops->post_deinit)
> -               pcie->cfg->ops->post_deinit(pcie);
> -err_disable_phy:
>         phy_power_off(pcie->phy);
>  err_deinit:
>         pcie->cfg->ops->deinit(pcie);
> @@ -1362,8 +1351,6 @@ static int qcom_pcie_host_init(struct pcie_port *pp)
>  static void qcom_pcie_host_deinit(struct qcom_pcie *pcie)
>  {
>         qcom_ep_reset_assert(pcie);
> -       if (pcie->cfg->ops->post_deinit)
> -               pcie->cfg->ops->post_deinit(pcie);
>         phy_power_off(pcie->phy);
>         pcie->cfg->ops->deinit(pcie);
>  }
> --
> 2.35.1
>


-- 
With best wishes
Dmitry