From mboxrd@z Thu Jan  1 00:00:00 1970
From: Greg KH <gregkh@linuxfoundation.org>
Subject: Re: [PATCH] IB/core: Perform modify QP on real one
Date: Wed, 28 Nov 2018 11:58:20 +0100
Message-ID: <20181128105820.GC1822@kroah.com>
References: <20181029151223.15114-1-leon@kernel.org>
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To: Leon Romanovsky <leon@kernel.org>
Cc: stable@vger.kernel.org, linux-rdma@vger.kernel.org, Parav Pandit <parav@mellanox.com>, Jack Morgenstein <jackm@dev.mellanox.co.il>, Jason Gunthorpe <jgg@mellanox.com>
List-Id: linux-rdma@vger.kernel.org

On Mon, Oct 29, 2018 at 05:12:23PM +0200, Leon Romanovsky wrote:
> From: Parav Pandit <parav@mellanox.com>
> 
> commit b2bedfb39541a7e14798d066b6f8685d84c8fcf5 upstream
> 
> Currently qp->port stores the port number whenever IB_QP_PORT
> QP attribute mask is set (during QP state transition to INIT state).
> This port number should be stored for the real QP when XRC target QP
> is used.
> 
> Follow the ib_modify_qp() implementation and hide the access to ->real_qp.
> 
> This commit is required for proper operation of commit 65be9cbe1224
> ("RDMA/uverbs: Expand primary and alt AV port checks") which was added
> to 4.14.61.
> 
> Without this commit, XRC qp's do not work.
> 
> Fixes: a512c2fbef9c ("IB/core: Introduce modify QP operation with udata")
> Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
> Signed-off-by: Parav Pandit <parav@mellanox.com>
> Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
> Signed-off-by: Leon Romanovsky <leon@kernel.org>
> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
> ---
>  drivers/infiniband/core/verbs.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)

Does not apply to the 4.14.y tree :(