This patche set fixes multiple bugs in IPMI driver especially for
the panic notifier callback panic_event() and related functions.
This callback is called before kdump if crash_kexec_post_notifiers
boot option is specified, so its robustness is very important.
panic_event() first tries to flush queued messages before panic,
and this can cause multiple trouble such as hang-up. PATCH 3 to 6
addresses this kind of problems.
PATCH 7 addresses a problem caused by malfunctioning BMC.
NOTE: I'm planning to post another patch set which includes a patch
to drop all queued messages at the beginning of panic_event() if
crash_kexec_post_notifiers boot option is specified. This will
improve the robustness of the panic notifier callback.
---
Hidehiro Kawai (7):
ipmi: Remove unneeded set_run_to_completion call
ipmi: Factor out message flushing procedure
ipmi: Don't flush messages in sneder() in run-to-completion mode
ipmi: Avoid touching possible corrupted lists in the panic context
ipmi: Don't call receive handler in the panic context
ipmi: Handle queued messages more certainly on panic
ipmi/kcs: Don't run the KCS state machine when it is KCS_IDLE
drivers/char/ipmi/ipmi_kcs_sm.c | 4 ++
drivers/char/ipmi/ipmi_msghandler.c | 66 +++++++++++++++++++++++++++++++++--
drivers/char/ipmi/ipmi_si_intf.c | 45 ++++++++++++------------
include/linux/ipmi_smi.h | 10 +++++
4 files changed, 100 insertions(+), 25 deletions(-)
--
Hidehiro Kawai
Hitachi, Ltd. Research & Development Group
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