Harald Freudenberger 1f0d22defd
s390/ap: Rework ap_dqap to deal with messages greater than recv buffer ...
Rework of the ap_dqap() inline function with the dqap inline assembler
invocation and the caller code in ap_queue.c to be able to handle
replies which exceed the receive buffer size.
ap_dqap() now provides two additional parameters to handle together
with the caller the case where a reply in the firmware queue entry
exceeds the given message buffer size. It depends on the caller how to
exactly handle this. The behavior implemented now by ap_sm_recv() in
ap_queue.c is to simple purge this entry from the firmware queue and
let the caller 'receive' a -EMSGSIZE for the request without
delivering any reply data - not even a truncated reply message.
However, the reworked ap_dqap() could now get invoked in a way that
the message is received in multiple parts and the caller assembles the
parts into one reply message.
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com >
Suggested-by: Juergen Christ <jchrist@linux.ibm.com >
Reviewed-by: Juergen Christ <jchrist@linux.ibm.com >
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com >
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1f0d22defd