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net/smc: handle unexpected response types for confirm link 

A delete link could arrive during confirm link processing. Handle this
situation directly in smc_llc_srv_conf_link() rather than using the
logic in smc_llc_wait() to avoid the unexpected message handling there.

Reviewed-by: Ursula Braun <ubraun@linux.ibm.com>
Fixes: 1551c95b61 ("net/smc: final part of add link processing as SMC server")
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Karsten Graul 2020-07-18 15:06:09 +02:00 committed by David S. Miller
parent 9b8737788a
commit a35fffbf98
1 changed files with 5 additions and 3 deletions
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8
net/smc/smc_llc.c
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@ -1051,12 +1051,14 @@ static int smc_llc_srv_conf_link(struct smc_link *link,
if (rc) if (rc)
return -ENOLINK; return -ENOLINK;
/* receive CONFIRM LINK response over the RoCE fabric */ /* receive CONFIRM LINK response over the RoCE fabric */
qentry = smc_llc_wait(lgr, link, SMC_LLC_WAIT_FIRST_TIME, qentry = smc_llc_wait(lgr, link, SMC_LLC_WAIT_FIRST_TIME, 0);
SMC_LLC_CONFIRM_LINK); if (!qentry ||
if (!qentry) { qentry->msg.raw.hdr.common.type != SMC_LLC_CONFIRM_LINK) {
/* send DELETE LINK */ /* send DELETE LINK */
smc_llc_send_delete_link(link, link_new->link_id, SMC_LLC_REQ, smc_llc_send_delete_link(link, link_new->link_id, SMC_LLC_REQ,
false, SMC_LLC_DEL_LOST_PATH); false, SMC_LLC_DEL_LOST_PATH);
if (qentry)
smc_llc_flow_qentry_del(&lgr->llc_flow_lcl);
return -ENOLINK; return -ENOLINK;
} }
smc_llc_save_peer_uid(qentry); smc_llc_save_peer_uid(qentry);