Re: [PATCH] bus: mhi: host: pci_generic: Drop redundant pci_enable_pcie_error_reporting()

Manivannan Sadhasivam
2023-03-08T05:21:23Z

On Tue, Mar 07, 2023 at 02:16:25PM -0600, Bjorn Helgaas wrote:
> From: Bjorn Helgaas <bhelgaas@google.com>
>
> pci_enable_pcie_error_reporting() enables the device to send ERR_*
> Messages. Since f26e58bf6f54 ("PCI/AER: Enable error reporting when AER is
> native"), the PCI core does this for all devices during enumeration, so the
> driver doesn't need to do it itself.
>
> Remove the redundant pci_enable_pcie_error_reporting() call from the
> driver. Also remove the corresponding pci_disable_pcie_error_reporting()
> from the driver .remove() path.
>
> Note that this only controls ERR_* Messages from the device. An ERR_*
> Message may cause the Root Port to generate an interrupt, depending on the
> AER Root Error Command register managed by the AER service driver.
>
> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>

Thanks,
Mani

> ---
> drivers/bus/mhi/host/pci_generic.c | 8 +-------
> 1 file changed, 1 insertion(+), 7 deletions(-)
>
> diff --git a/drivers/bus/mhi/host/pci_generic.c b/drivers/bus/mhi/host/pci_generic.c
> index f39657f71483..6e13c43a84d1 100644
> --- a/drivers/bus/mhi/host/pci_generic.c
> +++ b/drivers/bus/mhi/host/pci_generic.c
> @@ -8,7 +8,6 @@
> * Copyright (C) 2020 Linaro Ltd <loic.poulain@linaro.org>
> */
>
> -#include <linux/aer.h>
> #include <linux/delay.h>
> #include <linux/device.h>
> #include <linux/mhi.h>
> @@ -903,11 +902,9 @@ static int mhi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
> mhi_pdev->pci_state = pci_store_saved_state(pdev);
> pci_load_saved_state(pdev, NULL);
>
> - pci_enable_pcie_error_reporting(pdev);
> -
> err = mhi_register_controller(mhi_cntrl, mhi_cntrl_config);
> if (err)
> - goto err_disable_reporting;
> + return err;
>
> /* MHI bus does not power up the controller by default */
> err = mhi_prepare_for_power_up(mhi_cntrl);
> @@ -941,8 +938,6 @@ static int mhi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
> mhi_unprepare_after_power_down(mhi_cntrl);
> err_unregister:
> mhi_unregister_controller(mhi_cntrl);
> -err_disable_reporting:
> - pci_disable_pcie_error_reporting(pdev);
>
> return err;
> }
> @@ -965,7 +960,6 @@ static void mhi_pci_remove(struct pci_dev *pdev)
> pm_runtime_get_noresume(&pdev->dev);
>
> mhi_unregister_controller(mhi_cntrl);
> - pci_disable_pcie_error_reporting(pdev);
> }
>
> static void mhi_pci_shutdown(struct pci_dev *pdev)
> --
> 2.25.1
>

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