[v5,0/5] Fix long standing AER Error Handling Issues

Message

Naveen Naidu Oct. 25, 2021, 5 p.m. UTC

This patch series aims at fixing some of the AER error handling issues
we have.

Currently we have the following issues: 
  
  1. Confusing message in aer_print_error()
  2. aer_err_info not being initialized completely in DPC path before 
     we print the AER logs
  3. A bug [1] in clearing of AER registers in the native AER path

[1] https://lore.kernel.org/linux-pci/20151229155822.GA17321@localhost/

The patch series fixes the above things.

PATCH 1: 
  - Fixes the first issue
  - This patch is independent of other patches and can be applied
    seperately

PATCH 2 - 3:
  - Fixes the second issue
  - Patch 3 is depended on Patch 2 in the series

PATCH 4
  - Fixes the bug in clearing of AER registers which leades to
    AER message spew [1]

PATCH 5:
  - Adds extra information (devctl register) in AER error logs.
  - Patch 5 depends on Patch 4 of the series

Thanks,
Naveen Naidu

Changelog
=========
v5:
    - Edit the commit message of Patch 1 and Patch 5 to include how to
      test the AER messages using aer-inject.
    - Edit Patch 3 to initialize info.id depending on the trigger
      reason.
    - Drop few patches (v4 4/8, 5/8 7/8) since they were wrong.

v4:
    - Fix logical error in 6/8, in the previous version of the patch set
      there was a bug, in how I added the devices to the queue.

v3:
    - Edit the commit messages to be in imperative style and split the
      commits to be more atomic.

v2:
    - Add [PATCH 7] which includes the device control register 
      information in AER error logs.

Naveen Naidu (5):
  [PATCH v5 1/5] PCI/AER: Remove ID from aer_agent_string[]
  [PATCH v5 2/5] PCI: Cleanup struct aer_err_info
  [PATCH v5 3/5] PCI/DPC: Initialize info.id in dpc_process_error()
  [PATCH v5 4/5] PCI/AER: Clear error device AER registers in aer_irq()
  [PATCH v5 5/5] PCI/AER: Include DEVCTL in aer_print_error()

 drivers/pci/pci.h      |  23 +++-
 drivers/pci/pcie/aer.c | 269 ++++++++++++++++++++++++++++-------------
 drivers/pci/pcie/dpc.c |  16 ++-
 3 files changed, 214 insertions(+), 94 deletions(-)