opal-msg: Pass return value to callback handler

Kernel calls opal_get_msg() API to read OPAL message. In this path OPAL
calls "callback" handler to inform caller that kernel read the opal
message. It assumes that read is always success. This assumption was
fine as message was always fixed size.

Next patch introduces variable size opal message. In that situation
opal_get_msg() may fail due to insufficient buffer size (ex: old kernel
and new OPAL combination). So lets add `return value` parameter to
"callback" handler. So that caller knows kernel didn't read the
message and take appropriate action.

Cc: Jeremy Kerr <jk@ozlabs.org>
Cc: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Cc: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
Acked-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>

0 files changed, 0 insertions, 0 deletions