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Message-ID: <aDIyyMvQkMC40jnQ@ryzen>
Date: Sat, 24 May 2025 22:57:44 +0200
From: Niklas Cassel <cassel@...nel.org>
To: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc: bhelgaas@...gle.com, lpieralisi@...nel.org, kw@...ux.com,
linux-pci@...r.kernel.org, linux-arm-msm@...r.kernel.org,
linux-kernel@...r.kernel.org, wilfred.mallawa@....com,
Lukas Wunner <lukas@...ner.de>
Subject: Re: [PATCH 2/2] PCI: Rename host_bridge::reset_slot() to
host_bridge::reset_root_port()
On Sun, May 25, 2025 at 12:23:04AM +0530, Manivannan Sadhasivam wrote:
> The callback is supposed to reset the root port, hence it should be named
> as 'reset_root_port'. This also warrants renaming the rest of the instances
> of 'reset slot' as 'reset root port' in the drivers.
>
> Suggested-by: Lukas Wunner <lukas@...ner.de>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> ---
> drivers/pci/controller/dwc/pcie-dw-rockchip.c | 8 ++++----
> drivers/pci/controller/dwc/pcie-qcom.c | 8 ++++----
> drivers/pci/controller/pci-host-common.c | 20 +++++++++----------
> drivers/pci/pci.c | 6 +++---
> include/linux/pci.h | 2 +-
> 5 files changed, 22 insertions(+), 22 deletions(-)
>
> diff --git a/drivers/pci/controller/dwc/pcie-dw-rockchip.c b/drivers/pci/controller/dwc/pcie-dw-rockchip.c
> index 193e97adf228..0cc7186758ce 100644
> --- a/drivers/pci/controller/dwc/pcie-dw-rockchip.c
> +++ b/drivers/pci/controller/dwc/pcie-dw-rockchip.c
> @@ -85,7 +85,7 @@ struct rockchip_pcie_of_data {
> const struct pci_epc_features *epc_features;
> };
>
> -static int rockchip_pcie_rc_reset_slot(struct pci_host_bridge *bridge,
> +static int rockchip_pcie_rc_reset_root_port(struct pci_host_bridge *bridge,
> struct pci_dev *pdev);
>
> static int rockchip_pcie_readl_apb(struct rockchip_pcie *rockchip, u32 reg)
> @@ -261,7 +261,7 @@ static int rockchip_pcie_host_init(struct dw_pcie_rp *pp)
> rockchip);
>
> rockchip_pcie_enable_l0s(pci);
> - pp->bridge->reset_slot = rockchip_pcie_rc_reset_slot;
> + pp->bridge->reset_root_port = rockchip_pcie_rc_reset_slot;
You just renamed the function to rockchip_pcie_rc_reset_root_port(),
but you seem to use the old name here, so I would guess that this will
not compile.
With the function pointer renamed, this patch looks good to me:
Reviewed-by: Niklas Cassel <cassel@...nel.org>
>
> return 0;
> }
> @@ -700,7 +700,7 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
> return ret;
> }
>
> -static int rockchip_pcie_rc_reset_slot(struct pci_host_bridge *bridge,
> +static int rockchip_pcie_rc_reset_root_port(struct pci_host_bridge *bridge,
> struct pci_dev *pdev)
> {
> struct pci_bus *bus = bridge->bus;
> @@ -759,7 +759,7 @@ static int rockchip_pcie_rc_reset_slot(struct pci_host_bridge *bridge,
>
> /* Ignore errors, the link may come up later. */
> dw_pcie_wait_for_link(pci);
> - dev_dbg(dev, "slot reset completed\n");
> + dev_dbg(dev, "Root port reset completed\n");
> return ret;
>
> deinit_clk:
> diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
> index 0c59030a2d55..840263c1efe0 100644
> --- a/drivers/pci/controller/dwc/pcie-qcom.c
> +++ b/drivers/pci/controller/dwc/pcie-qcom.c
> @@ -291,7 +291,7 @@ struct qcom_pcie {
> };
>
> #define to_qcom_pcie(x) dev_get_drvdata((x)->dev)
> -static int qcom_pcie_reset_slot(struct pci_host_bridge *bridge,
> +static int qcom_pcie_reset_root_port(struct pci_host_bridge *bridge,
> struct pci_dev *pdev);
>
> static void qcom_ep_reset_assert(struct qcom_pcie *pcie)
> @@ -1277,7 +1277,7 @@ static int qcom_pcie_host_init(struct dw_pcie_rp *pp)
> goto err_assert_reset;
> }
>
> - pp->bridge->reset_slot = qcom_pcie_reset_slot;
> + pp->bridge->reset_root_port = qcom_pcie_reset_root_port;
>
> return 0;
>
> @@ -1533,7 +1533,7 @@ static void qcom_pcie_icc_opp_update(struct qcom_pcie *pcie)
> }
> }
>
> -static int qcom_pcie_reset_slot(struct pci_host_bridge *bridge,
> +static int qcom_pcie_reset_root_port(struct pci_host_bridge *bridge,
> struct pci_dev *pdev)
> {
> struct pci_bus *bus = bridge->bus;
> @@ -1589,7 +1589,7 @@ static int qcom_pcie_reset_slot(struct pci_host_bridge *bridge,
>
> qcom_pcie_start_link(pci);
>
> - dev_dbg(dev, "Slot reset completed\n");
> + dev_dbg(dev, "Root port reset completed\n");
>
> return 0;
>
> diff --git a/drivers/pci/controller/pci-host-common.c b/drivers/pci/controller/pci-host-common.c
> index afa7b140a04a..24e357e85adb 100644
> --- a/drivers/pci/controller/pci-host-common.c
> +++ b/drivers/pci/controller/pci-host-common.c
> @@ -99,22 +99,22 @@ void pci_host_common_remove(struct platform_device *pdev)
> EXPORT_SYMBOL_GPL(pci_host_common_remove);
>
> #if IS_ENABLED(CONFIG_PCIEAER)
> -static pci_ers_result_t pci_host_reset_slot(struct pci_dev *dev)
> +static pci_ers_result_t pci_host_reset_root_port(struct pci_dev *dev)
> {
> int ret;
>
> ret = pci_bus_error_reset(dev);
> if (ret) {
> - pci_err(dev, "Failed to reset slot: %d\n", ret);
> + pci_err(dev, "Failed to reset root port: %d\n", ret);
> return PCI_ERS_RESULT_DISCONNECT;
> }
>
> - pci_info(dev, "Slot has been reset\n");
> + pci_info(dev, "Root port has been reset\n");
>
> return PCI_ERS_RESULT_RECOVERED;
> }
>
> -static void pci_host_recover_slots(struct pci_host_bridge *host)
> +static void pci_host_reset_root_ports(struct pci_host_bridge *host)
> {
> struct pci_bus *bus = host->bus;
> struct pci_dev *dev;
> @@ -124,11 +124,11 @@ static void pci_host_recover_slots(struct pci_host_bridge *host)
> continue;
>
> pcie_do_recovery(dev, pci_channel_io_frozen,
> - pci_host_reset_slot);
> + pci_host_reset_root_port);
> }
> }
> #else
> -static void pci_host_recover_slots(struct pci_host_bridge *host)
> +static void pci_host_reset_root_ports(struct pci_host_bridge *host)
> {
> struct pci_bus *bus = host->bus;
> struct pci_dev *dev;
> @@ -140,17 +140,17 @@ static void pci_host_recover_slots(struct pci_host_bridge *host)
>
> ret = pci_bus_error_reset(dev);
> if (ret)
> - pci_err(dev, "Failed to reset slot: %d\n", ret);
> + pci_err(dev, "Failed to reset root port: %d\n", ret);
> else
> - pci_info(dev, "Slot has been reset\n");
> + pci_info(dev, "Root port has been reset\n");
> }
> }
> #endif
>
> void pci_host_handle_link_down(struct pci_host_bridge *bridge)
> {
> - dev_info(&bridge->dev, "Recovering slots due to Link Down\n");
> - pci_host_recover_slots(bridge);
> + dev_info(&bridge->dev, "Recovering root ports due to Link Down\n");
> + pci_host_reset_root_ports(bridge);
> }
> EXPORT_SYMBOL_GPL(pci_host_handle_link_down);
>
> diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
> index 6d6e9ce2bbcc..154d33e1af84 100644
> --- a/drivers/pci/pci.c
> +++ b/drivers/pci/pci.c
> @@ -4985,16 +4985,16 @@ void __weak pcibios_reset_secondary_bus(struct pci_dev *dev)
> struct pci_host_bridge *host = pci_find_host_bridge(dev->bus);
> int ret;
>
> - if (pci_is_root_bus(dev->bus) && host->reset_slot) {
> + if (pci_is_root_bus(dev->bus) && host->reset_root_port) {
> /*
> * Save the config space of the root port before doing the
> * reset, since the state could be lost. The device state
> * should've been saved by the caller.
> */
> pci_save_state(dev);
> - ret = host->reset_slot(host, dev);
> + ret = host->reset_root_port(host, dev);
> if (ret)
> - pci_err(dev, "failed to reset slot: %d\n", ret);
> + pci_err(dev, "failed to reset root port: %d\n", ret);
> else
> /* Now restore it on success */
> pci_restore_state(dev);
> diff --git a/include/linux/pci.h b/include/linux/pci.h
> index 8d7d2a49b76c..ab4f4a668f6d 100644
> --- a/include/linux/pci.h
> +++ b/include/linux/pci.h
> @@ -599,7 +599,7 @@ struct pci_host_bridge {
> void (*release_fn)(struct pci_host_bridge *);
> int (*enable_device)(struct pci_host_bridge *bridge, struct pci_dev *dev);
> void (*disable_device)(struct pci_host_bridge *bridge, struct pci_dev *dev);
> - int (*reset_slot)(struct pci_host_bridge *bridge, struct pci_dev *dev);
> + int (*reset_root_port)(struct pci_host_bridge *bridge, struct pci_dev *dev);
> void *release_data;
> unsigned int ignore_reset_delay:1; /* For entire hierarchy */
> unsigned int no_ext_tags:1; /* No Extended Tags */
> --
> 2.43.0
>
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