linux-kernel - Re: [PATCH] habanalabs: Drop redundant pci_enable_pcie_error

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Message-ID: <CAFCwf10qpYpZjycdaZN5+yvxg9Ata5Sg3YTpfqsvvA4BCgC_DA@mail.gmail.com>
Date:   Wed, 8 Mar 2023 14:36:57 +0200
From:   Oded Gabbay <ogabbay@...nel.org>
To:     Bjorn Helgaas <helgaas@...nel.org>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Bjorn Helgaas <bhelgaas@...gle.com>
Subject: Re: [PATCH] habanalabs: Drop redundant pci_enable_pcie_error_reporting()

On Tue, Mar 7, 2023 at 10:27 PM Bjorn Helgaas <helgaas@...nel.org> wrote:
>
> From: Bjorn Helgaas <bhelgaas@...gle.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@...gle.com>
> ---
>  drivers/accel/habanalabs/common/habanalabs_drv.c | 5 -----
>  1 file changed, 5 deletions(-)
>
> diff --git a/drivers/accel/habanalabs/common/habanalabs_drv.c b/drivers/accel/habanalabs/common/habanalabs_drv.c
> index 03dae57dc838..26f65aa21079 100644
> --- a/drivers/accel/habanalabs/common/habanalabs_drv.c
> +++ b/drivers/accel/habanalabs/common/habanalabs_drv.c
> @@ -12,7 +12,6 @@
>  #include "../include/hw_ip/pci/pci_general.h"
>
>  #include <linux/pci.h>
> -#include <linux/aer.h>
>  #include <linux/module.h>
>
>  #define CREATE_TRACE_POINTS
> @@ -550,8 +549,6 @@ static int hl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
>
>         pci_set_drvdata(pdev, hdev);
>
> -       pci_enable_pcie_error_reporting(pdev);
> -
>         rc = hl_device_init(hdev, hl_class);
>         if (rc) {
>                 dev_err(&pdev->dev, "Fatal error during habanalabs device init\n");
> @@ -562,7 +559,6 @@ static int hl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
>         return 0;
>
>  disable_device:
> -       pci_disable_pcie_error_reporting(pdev);
>         pci_set_drvdata(pdev, NULL);
>         destroy_hdev(hdev);
>
> @@ -585,7 +581,6 @@ static void hl_pci_remove(struct pci_dev *pdev)
>                 return;
>
>         hl_device_fini(hdev);
> -       pci_disable_pcie_error_reporting(pdev);
>         pci_set_drvdata(pdev, NULL);
>         destroy_hdev(hdev);
>  }
> --
> 2.25.1
>
Reviewed-by: Oded Gabbay <ogabbay@...nel.org>

Applied to -next
Thanks,
Oded