linux-kernel - Re: [PATCH v5 0/2] ACPI: APEI: Add support to notify the vendor specific HW errors

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Date:   Wed, 25 Mar 2020 10:22:20 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Shiju Jose <shiju.jose@...wei.com>
Cc:     linux-acpi@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org, rjw@...ysocki.net, lenb@...nel.org,
        bp@...en8.de, james.morse@....com, tony.luck@...el.com,
        gregkh@...uxfoundation.org, zhangliguang@...ux.alibaba.com,
        tglx@...utronix.de, linuxarm@...wei.com,
        jonathan.cameron@...wei.com, tanxiaofei@...wei.com,
        yangyicong@...ilicon.com
Subject: Re: [PATCH v5 0/2] ACPI: APEI: Add support to notify the vendor
 specific HW errors

1) If you can post things as a series, i.e., with patch 1/2 and patch
2/2 being responses to the 0/2 cover letter, that makes things easier.
It looks like you did this for the previous postings.

2) When applying these, "git am" complained (but they did apply
cleanly):

  warning: Patch sent with format=flowed; space at the end of lines might be lost.
  Applying: APEI: Add support to notify the vendor specific HW errors
  warning: Patch sent with format=flowed; space at the end of lines might be lost.
  Applying: PCI: HIP: Add handling of HiSilicon HIP PCIe controller errors

3) drivers/pci/controller/pcie-hisi-error.c should be next to
drivers/pci/controller/dwc/pcie-hisi.c, shouldn't it?

4) Your subject lines don't match the convention.  "git log --oneline
drivers/acpi/apei" says:

  011077d8fbfe ("APEI: Add support to notify the vendor specific HW errors")
  cea79e7e2f24 ("apei/ghes: Do not delay GHES polling")
  933ca4e323de ("acpi: Use pr_warn instead of pr_warning")
  6abc7622271d ("ACPI / APEI: Release resources if gen_pool_add() fails")
  bb100b64763c ("ACPI / APEI: Get rid of NULL_UUID_LE constant")
  371b86897d01 ("ACPI / APEI: Remove needless __ghes_check_estatus() calls")

and "git log --oneline --follow drivers/pci/controller/dwc/pcie-hisi*"
says:

  6e0832fa432e ("PCI: Collect all native drivers under drivers/pci/controller/")
  8cfab3cf63cf ("PCI: Add SPDX GPL-2.0 to replace GPL v2 boilerplate")
  5a4751680189 ("PCI: hisi: Constify dw_pcie_host_ops structure")
  b379d385bbaa ("PCI: hisi: Remove unused variable driver")
  a5f40e8098fe ("PCI: Don't allow unbinding host controllers that aren't prepared")
  e313a447e735 ("PCI: hisi: Update PCI config space remap function")
  b9c1153f7a9c ("PCI: hisi: Fix DT binding (hisi-pcie-almost-ecam)")

So your subject lines should be:

  ACPI / APEI: ...
  PCI: hisi: ...

On Wed, Mar 25, 2020 at 01:55:03PM +0000, Shiju Jose wrote:
> Presently the vendor drivers are unable to do the recovery for the
> vendor specific recoverable HW errors, reported to the APEI driver
> in the vendor defined sections, because APEI driver does not support
> reporting the same to the vendor drivers.
> 
> This patch set
> 1. add an interface to the APEI driver to enable the vendor
> drivers to register the event handling functions for the corresponding
> vendor specific HW errors and report the error to the vendor driver.
> 
> 2. add driver to handle HiSilicon hip08 PCIe controller's errors
>    which is an example application of the above APEI interface.
> 
> Changes:
> 
> V5:
> 1. Fix comments from James Morse.
> 1.1 Changed the notification method to use the atomic_notifier_chain.
> 1.2 Add the error handled status for the user space.
> 
> V4:
> 1. Fix for the smatch warning in the PCIe error driver:
>    warn: should '((((1))) << (9 + i))' be a 64 bit type?
>    if (err->val_bits & BIT(HISI_PCIE_LOCAL_VALID_ERR_MISC + i))
> 	^^^ This should be BIT_ULL() because it goes up to 9 + 32.
> 
> V3:
> 1. Fix the comments from Bjorn Helgaas.
> 
> V2:
> 1. Changes in the HiSilicon PCIe controller's error handling driver
>    for the comments from Bjorn Helgaas.
> 
> 2. Changes in the APEI interface to support reporting the vendor error
>    for module with multiple devices, but use the same section type.
>    In the error handler will use socket id/sub module id etc to distinguish
>    the device.
> 
> V1:
> 1. Fix comments from James Morse.
> 
> 2. add driver to handle HiSilicon hip08 PCIe controller's errors,
>    which is an application of the above interface.
> 
> Shiju Jose (1):
>   APEI: Add support to notify the vendor specific HW errors
> 
> Yicong Yang (1):
>   PCI: HIP: Add handling of HiSilicon HIP PCIe controller errors
> 
>  drivers/acpi/apei/ghes.c                 |  35 ++-
>  drivers/pci/controller/Kconfig           |   8 +
>  drivers/pci/controller/Makefile          |   1 +
>  drivers/pci/controller/pcie-hisi-error.c | 357 +++++++++++++++++++++++
>  drivers/ras/ras.c                        |   5 +-
>  include/acpi/ghes.h                      |  28 ++
>  include/linux/ras.h                      |   6 +-
>  include/ras/ras_event.h                  |   7 +-
>  8 files changed, 440 insertions(+), 7 deletions(-)
>  create mode 100644 drivers/pci/controller/pcie-hisi-error.c
> 
> -- 
> 2.17.1