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IB/iser: Fix catastrophic error flow hang 

In case of the HCA going into catasrophic error flow, the
beacon post_send is likely to fail, so surely there will
be no completion for it.

In this case, use a best effort approach and don't wait for beacon
completion if we failed to post the send.

Reported-by: Alex Tabachnik <alext@mellanox.com>
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Sagi Grimberg 2014-12-07 16:09:53 +02:00 committed by Roland Dreier
parent f4641ef701
commit 16df2a26fb
1 changed files with 3 additions and 1 deletions
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4
drivers/infiniband/ulp/iser/iser_verbs.c
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@ -681,8 +681,10 @@ int iser_conn_terminate(struct iser_conn *iser_conn)
/* post an indication that all flush errors were consumed */
err = ib_post_send(ib_conn->qp, &ib_conn->beacon, &bad_wr);
if (err)
if (err) {
iser_err("conn %p failed to post beacon", ib_conn);
return 1;
}
wait_for_completion(&ib_conn->flush_comp);
}