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| author |   Krishnamraju Eraparaju <krishna2@chelsio.com> | 2020-02-04 14:42:30 +0530 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@mellanox.com> | 2020-02-11 14:28:00 -0400 |
| commit | d219face9059f38ad187bde133451a2a308fdb7c (patch) | |
| tree | 83aa8a9dbfca1ab683728290fe970ff7ce9b1f23 /Kconfig | |
| parent | IB/mlx5: Return failure when rts2rts_qp_counters_set_id is not supported (diff) | |
| download | linux-dev-d219face9059f38ad187bde133451a2a308fdb7c.tar.xz linux-dev-d219face9059f38ad187bde133451a2a308fdb7c.zip | |
RDMA/iw_cxgb4: initiate CLOSE when entering TERM
As per draft-hilland-iwarp-verbs-v1.0, sec 6.2.3, always initiate a CLOSE
when entering into TERM state.
In c4iw_modify_qp(), disconnect operation should only be performed when
the modify_qp call is invoked from ib_core. And all other internal
modify_qp calls(invoked within iw_cxgb4) that needs 'disconnect' should
call c4iw_ep_disconnect() explicitly after modify_qp. Otherwise, deadlocks
like below can occur:
Call Trace:
schedule+0x2f/0xa0
schedule_preempt_disabled+0xa/0x10
__mutex_lock.isra.5+0x2d0/0x4a0
c4iw_ep_disconnect+0x39/0x430 => tries to reacquire ep lock again
c4iw_modify_qp+0x468/0x10d0
rx_data+0x218/0x570 => acquires ep lock
process_work+0x5f/0x70
process_one_work+0x1a7/0x3b0
worker_thread+0x30/0x390
kthread+0x112/0x130
ret_from_fork+0x35/0x40
Fixes: d2c33370ae73 ("RDMA/iw_cxgb4: Always disconnect when QP is transitioning to TERMINATE state")
Link: https://lore.kernel.org/r/20200204091230.7210-1-krishna2@chelsio.com
Signed-off-by: Krishnamraju Eraparaju <krishna2@chelsio.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'Kconfig')
0 files changed, 0 insertions, 0 deletions