tree 6cf9f3b90cc1118aa2fcd716537916524384d428
parent dd5e6e38b2b8bd8bf71cae800e2b613e85ef1522
author David Dillow <dillowda@ornl.gov> 1286563247 -0400
committer Roland Dreier <rolandd@cisco.com> 1287811150 -0700

IB/srp: Implement SRP_CRED_REQ and SRP_AER_REQ

This patch adds support for SRP_CRED_REQ to avoid a lockup by targets
that use that mechanism to return credits to the initiator. This
prevents a lockup observed in the field where we would never add the
credits from the SRP_CRED_REQ to our current count, and would therefore
never send another command to the target.

Minimal support for SRP_AER_REQ is also added, as these messages can
also be used to convey additional credits to the initiator.

Based upon extensive debugging and code by Bart Van Assche and a bug
report by Chris Worley.

Signed-off-by: David Dillow <dillowda@ornl.gov>
Signed-off-by: Roland Dreier <rolandd@cisco.com>