diff options
| -rw-r--r-- | drivers/scsi/qla2xxx/tcm_qla2xxx.c | 48 |
1 files changed, 31 insertions, 17 deletions
diff --git a/drivers/scsi/qla2xxx/tcm_qla2xxx.c b/drivers/scsi/qla2xxx/tcm_qla2xxx.c index 3cee5b67d65b..a641c970569a 100644 --- a/drivers/scsi/qla2xxx/tcm_qla2xxx.c +++ b/drivers/scsi/qla2xxx/tcm_qla2xxx.c @@ -821,6 +821,8 @@ static int tcm_qla2xxx_setup_nacl_from_rport( return 0; } +static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *, + struct tcm_qla2xxx_nacl *, struct qla_tgt_sess *); /* * Expected to be called with struct qla_hw_data->hardware_lock held */ @@ -842,6 +844,16 @@ static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct qla_tgt_sess *sess) pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n", se_nacl, nacl->nport_wwnn, nacl->nport_id); + /* + * Now clear the se_nacl and session pointers from our HW lport lookup + * table mapping for this initiator's fabric S_ID and LOOP_ID entries. + * + * This is done ahead of callbacks into tcm_qla2xxx_free_session() -> + * target_wait_for_sess_cmds() before the session waits for outstanding + * I/O to complete, to avoid a race between session shutdown execution + * and incoming ATIOs or TMRs picking up a stale se_node_act reference. + */ + tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess); } static void tcm_qla2xxx_release_session(struct kref *kref) @@ -1409,6 +1421,25 @@ static void tcm_qla2xxx_set_sess_by_loop_id( nacl->qla_tgt_sess, new_se_nacl, new_se_nacl->initiatorname); } +/* + * Should always be called with qla_hw_data->hardware_lock held. + */ +static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport, + struct tcm_qla2xxx_nacl *nacl, struct qla_tgt_sess *sess) +{ + struct se_session *se_sess = sess->se_sess; + unsigned char be_sid[3]; + + be_sid[0] = sess->s_id.b.domain; + be_sid[1] = sess->s_id.b.area; + be_sid[2] = sess->s_id.b.al_pa; + + tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess, + sess, be_sid); + tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess, + sess, sess->loop_id); +} + static void tcm_qla2xxx_free_session(struct qla_tgt_sess *sess) { struct qla_tgt *tgt = sess->tgt; @@ -1417,8 +1448,6 @@ static void tcm_qla2xxx_free_session(struct qla_tgt_sess *sess) struct se_node_acl *se_nacl; struct tcm_qla2xxx_lport *lport; struct tcm_qla2xxx_nacl *nacl; - unsigned char be_sid[3]; - unsigned long flags; BUG_ON(in_interrupt()); @@ -1438,21 +1467,6 @@ static void tcm_qla2xxx_free_session(struct qla_tgt_sess *sess) return; } target_wait_for_sess_cmds(se_sess, 0); - /* - * And now clear the se_nacl and session pointers from our HW lport - * mappings for fabric S_ID and LOOP_ID. - */ - memset(&be_sid, 0, 3); - be_sid[0] = sess->s_id.b.domain; - be_sid[1] = sess->s_id.b.area; - be_sid[2] = sess->s_id.b.al_pa; - - spin_lock_irqsave(&ha->hardware_lock, flags); - tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess, - sess, be_sid); - tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess, - sess, sess->loop_id); - spin_unlock_irqrestore(&ha->hardware_lock, flags); transport_deregister_session_configfs(sess->se_sess); transport_deregister_session(sess->se_sess); |