On Thu, Jul 14, 2022 at 09:30:47AM +0800, Cheng Xu wrote:
> If siw_recv_mpa_rr returns -EAGAIN, it means that the MPA reply hasn't
> been received completely, and should not report IW_CM_EVENT_CONNECT_REPLY
> in this case. This may trigger a call trace in iw_cm. A simple way to
> trigger this:
> server: ib_send_lat
> client: ib_send_lat -R <server_ip>
>
> The call trace looks like this:
>
> kernel BUG at drivers/infiniband/core/iwcm.c:894!
> invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
> <...>
> Workqueue: iw_cm_wq cm_work_handler [iw_cm]
> Call Trace:
> <TASK>
> cm_work_handler+0x1dd/0x370 [iw_cm]
> process_one_work+0x1e2/0x3b0
> worker_thread+0x49/0x2e0
> ? rescuer_thread+0x370/0x370
> kthread+0xe5/0x110
> ? kthread_complete_and_exit+0x20/0x20
> ret_from_fork+0x1f/0x30
> </TASK>
>
> Signed-off-by: Cheng Xu <chengyou@xxxxxxxxxxxxxxxxx>
> ---
> drivers/infiniband/sw/siw/siw_cm.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
Fixes: 6c52fdc244b5 ("rdma/siw: connection management")
Thanks, applied.
