From: Or Gerlitz <ogerlitz@mellanox.com>
Date: Sun, 29 Apr 2012 14:04:22 +0000 (+0300)
Subject: IB/core: Use qp->usecnt to track multicast attach/detach
X-Git-Tag: v3.5-rc1~171^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c3bccbfbb71f5e8a77129c7a069f5c5648cc9cf1;p=pandora-kernel.git

IB/core: Use qp->usecnt to track multicast attach/detach

Just as we don't allow PDs, CQs, etc. to be destroyed if there are QPs
that are attached to them, don't let a QP be destroyed if there are
multicast group(s) attached to it.  Use the existing usecnt field of
struct ib_qp which was added by commit 0e0ec7e ("RDMA/core: Export
ib_open_qp() to share XRC TGT QPs") to track this.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
---

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