[PATCH 0/6] powerpc/eeh: Refactor config accessors

Gavin Shan gwshan at linux.vnet.ibm.com
Wed Oct 1 17:07:48 EST 2014

When EEH errors are detected on some particular PCI adapters, one of
which is shown as follows, the PCI config space of thoese PCI adapters
(PE) should be blocked. Otherwise, we will run into fenced PHB when
collecting EEH logs (part of recovery). The patchset fixes this issue.
Also, EEH_PE_RESET is replaced with EEH_PE_CFG_BLOCKED to indicate its
usage. It's bad idea to allow PCI config access even EEH_PE_CFG_BLOCKED
flag is set for the corresponding PE because it potentially triggers
recursive EEH error. The patchset also blocks config request from EEH
backend if necessary.

Gavin Shan (6):
  powerpc/eeh: Fix condition for isolated state
  powerpc/eeh: Rename flag EEH_PE_RESET to EEH_PE_CFG_BLOCKED
  powerpc/powernv: Drop config requests in EEH accessors
  powerpc/pseries: Drop config requests in EEH accessors
  powerpc/eeh: Block PCI config access upon frozen PE
  powerpc/eeh: Don't collect logs on PE with blocked config space

 arch/powerpc/include/asm/eeh.h               |  3 +-
 arch/powerpc/kernel/eeh.c                    | 19 +++++++---
 arch/powerpc/kernel/eeh_driver.c             | 12 +++---
 arch/powerpc/kernel/eeh_pe.c                 | 10 ++++-
 arch/powerpc/kernel/rtas_pci.c               | 30 ++++++---------
 arch/powerpc/platforms/powernv/eeh-ioda.c    |  2 +-
 arch/powerpc/platforms/powernv/eeh-powernv.c | 56 +++++++++++++++++++++++++++-
 arch/powerpc/platforms/powernv/pci.c         |  2 +-
 8 files changed, 97 insertions(+), 37 deletions(-)


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