target/linux/generic/backport-6.1/853-v6.2-bus-mhi-host-pci_generic-Drop-redundant-pci_enable_p.patch

   1 From 6c00e1e4e9817e85b8ba83024cfa88382f898841 Mon Sep 17 00:00:00 2001
   2 From: Bjorn Helgaas <bhelgaas@google.com>
   3 Date: Tue, 7 Mar 2023 14:16:25 -0600
   4 Subject: [PATCH 04/13] bus: mhi: host: pci_generic: Drop redundant
   5  pci_enable_pcie_error_reporting()
   6
   7 pci_enable_pcie_error_reporting() enables the device to send ERR_*
   8 Messages.  Since commit <f26e58bf6f54> ("PCI/AER: Enable error reporting
   9 when AER is native"), the PCI core does this for all devices during
  10 enumeration, so the driver doesn't need to do it itself.
  11
  12 Remove the redundant pci_enable_pcie_error_reporting() call from the
  13 driver.  Also remove the corresponding pci_disable_pcie_error_reporting()
  14 from the driver .remove() path.
  15
  16 Note that this only controls ERR_* Messages from the device.  An ERR_*
  17 Message may cause the Root Port to generate an interrupt, depending on the
  18 AER Root Error Command register managed by the AER service driver.
  19
  20 Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
  21 Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
  22 Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
  23 Link: https://lore.kernel.org/r/20230307201625.879567-1-helgaas@kernel.org
  24 Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
  25 ---
  26  drivers/bus/mhi/host/pci_generic.c | 8 +-------
  27  1 file changed, 1 insertion(+), 7 deletions(-)
  28
  29 --- a/drivers/bus/mhi/host/pci_generic.c
  30 +++ b/drivers/bus/mhi/host/pci_generic.c
  31 @@ -8,7 +8,6 @@
  32   * Copyright (C) 2020 Linaro Ltd <loic.poulain@linaro.org>
  33   */
  34
  35 -#include <linux/aer.h>
  36  #include <linux/delay.h>
  37  #include <linux/device.h>
  38  #include <linux/mhi.h>
  39 @@ -901,11 +900,9 @@ static int mhi_pci_probe(struct pci_dev
  40         mhi_pdev->pci_state = pci_store_saved_state(pdev);
  41         pci_load_saved_state(pdev, NULL);
  42
  43 -       pci_enable_pcie_error_reporting(pdev);
  44 -
  45         err = mhi_register_controller(mhi_cntrl, mhi_cntrl_config);
  46         if (err)
  47 -               goto err_disable_reporting;
  48 +               return err;
  49
  50         /* MHI bus does not power up the controller by default */
  51         err = mhi_prepare_for_power_up(mhi_cntrl);
  52 @@ -939,8 +936,6 @@ err_unprepare:
  53         mhi_unprepare_after_power_down(mhi_cntrl);
  54  err_unregister:
  55         mhi_unregister_controller(mhi_cntrl);
  56 -err_disable_reporting:
  57 -       pci_disable_pcie_error_reporting(pdev);
  58
  59         return err;
  60  }
  61 @@ -963,7 +958,6 @@ static void mhi_pci_remove(struct pci_de
  62                 pm_runtime_get_noresume(&pdev->dev);
  63
  64         mhi_unregister_controller(mhi_cntrl);
  65 -       pci_disable_pcie_error_reporting(pdev);
  66  }
  67
  68  static void mhi_pci_shutdown(struct pci_dev *pdev)