From: Pramod Kumar <pramod@chelsio.com>
Date: Fri, 21 Nov 2014 15:36:35 +0000 (-0600)
Subject: RDMA/cxgb4: Configure 0B MRs to match HW implementation
X-Git-Tag: omap-for-v3.19/fixes-rc1~37^2^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=123bc2a27aa4cd18a5fe4f5d66254e4863870362;p=pandora-kernel.git

RDMA/cxgb4: Configure 0B MRs to match HW implementation

0B MRs need some tweaks to work correctly with HW. When writing the
TPTE, if the MR length is zero we now:

1) turn off all permissions
2) set the length to -1

While functionality/capabilities of the MR are the same with these
changes, it resolves a dapltest 0B RDMA Read test failure.  Based on
original work by Steve Wise <swise@opengridcomputing.com>.

Signed-off-by: Pramod Kumar <pramod@chelsio.com>
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
---

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