hw/fsp: Do not queue SP and SPCN class messages during reset/reloadskiboot-5.3.x

During FSP R/R, the FSP is inaccessible and will lose state. Messages to the
FSP are generally queued for sending later.

It does seem like the FSP fails to process any subseuqent messages of certain
classes (SP info -- ipmi) if it receives queued mbox messages it isn't expecting.

In certain other cases (sensors), the FSP driver returns a default code (async
completion) even though there is no known bound from the time of this error
return to the actual data being available. The kernel driver keeps waiting
leading to soft-lockup on the host side.

Mitigate both these (known) cases by returning OPAL_BUSY so the host driver
knows to retry later.

With this change, the sensors command works fine when the FSP comes back.

This version also resolves the remaining IPMI issues

Signed-off-by: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Tested-by: Pridhiviraj Paidipeddi <ppaidipe@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
(cherry picked from commit 4940b8148640c06e139aec8c6d0370af7dd3b184)
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

0 files changed, 0 insertions, 0 deletions