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Date:   Tue, 7 Jul 2020 13:31:28 -0300
From:   Jason Gunthorpe <jgg@nvidia.com>
To:     Leon Romanovsky <leon@kernel.org>
CC:     Doug Ledford <dledford@redhat.com>,
        Zhu Yanjun <yanjunz@mellanox.com>, <linux-rdma@vger.kernel.org>
Subject: Re: [PATCH rdma-next] RDMA/rxe: Skip dgid check in loopback mode
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On Tue, Jun 30, 2020 at 03:36:05PM +0300, Leon Romanovsky wrote:
> From: Zhu Yanjun <yanjunz@mellanox.com>
> 
> In the loopback tests, the following call trace occurs.
> 
> Call Trace:
>  __rxe_do_task+0x1a/0x30 [rdma_rxe]
>  rxe_qp_destroy+0x61/0xa0 [rdma_rxe]
>  rxe_destroy_qp+0x20/0x60 [rdma_rxe]
>  ib_destroy_qp_user+0xcc/0x220 [ib_core]
>  uverbs_free_qp+0x3c/0xc0 [ib_uverbs]
>  destroy_hw_idr_uobject+0x24/0x70 [ib_uverbs]
>  uverbs_destroy_uobject+0x43/0x1b0 [ib_uverbs]
>  uobj_destroy+0x41/0x70 [ib_uverbs]
>  __uobj_get_destroy+0x39/0x70 [ib_uverbs]
>  ib_uverbs_destroy_qp+0x88/0xc0 [ib_uverbs]
>  ib_uverbs_handler_UVERBS_METHOD_INVOKE_WRITE+0xb9/0xf0 [ib_uverbs]
>  ib_uverbs_cmd_verbs+0xb16/0xc30 [ib_uverbs]
> 
> The root cause is that the actual RDMA connection is not created in the
> loopback tests and the rxe_match_dgid will fail randomly.
> 
> To fix this call trace which appear in the loopback tests, skip check
> of the dgid.
> 
> Fixes: 8700e3e7c485 ("Soft RoCE driver")
> Signed-off-by: Zhu Yanjun <yanjunz@mellanox.com>
> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
> ---
>  drivers/infiniband/sw/rxe/rxe_recv.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)

Applied to for-next, thanks

Jason