[PATCH 24/31] qla2xxx: Cleanup NPIV host in target mode during config teardown

[Himanshu Madhani]

From: Quinn Tran <quinn.t...@cavium.com>

When we tear down the NPIV host configuration in target mode, the
qla_tgt struct was left dangling on the global list. This patch
cleans up link list and frees memory.

Signed-off-by: Quinn Tran <quinn.t...@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madh...@cavium.com>
---
 drivers/scsi/qla2xxx/qla_target.c | 11 +++++++----
 drivers/scsi/qla2xxx/qla_target.h |  1 +
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_target.c 
b/drivers/scsi/qla2xxx/qla_target.c
index 4f1621fd5ef2..43113d52893b 100644
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -1528,6 +1528,7 @@ static void qlt_release(struct qla_tgt *tgt)
        u64 key = 0;
        u16 i;
        struct qla_qpair_hint *h;
+       struct qla_hw_data *ha = vha->hw;
 
        if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stop &&
            !tgt->tgt_stopped)
@@ -1548,12 +1549,18 @@ static void qlt_release(struct qla_tgt *tgt)
                }
        }
        kfree(tgt->qphints);
+       mutex_lock(&qla_tgt_mutex);
+       list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
+       mutex_unlock(&qla_tgt_mutex);
 
        btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
                btree_remove64(&tgt->lun_qpair_map, key);
 
        btree_destroy64(&tgt->lun_qpair_map);
 
+       if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->remove_target)
+               ha->tgt.tgt_ops->remove_target(vha);
+
        vha->vha_tgt.qla_tgt = NULL;
 
        ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
@@ -6175,10 +6182,6 @@ int qlt_remove_target(struct qla_hw_data *ha, struct 
scsi_qla_host *vha)
        /* free left over qfull cmds */
        qlt_init_term_exchange(vha);
 
-       mutex_lock(&qla_tgt_mutex);
-       list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
-       mutex_unlock(&qla_tgt_mutex);
-
        ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
            vha->host_no, ha);
        qlt_release(vha->vha_tgt.qla_tgt);
diff --git a/drivers/scsi/qla2xxx/qla_target.h 
b/drivers/scsi/qla2xxx/qla_target.h
index 96fce43e1e46..aba58d3848a6 100644
--- a/drivers/scsi/qla2xxx/qla_target.h
+++ b/drivers/scsi/qla2xxx/qla_target.h
@@ -705,6 +705,7 @@ struct qla_tgt_func_tmpl {
        int (*get_dif_tags)(struct qla_tgt_cmd *cmd, uint16_t *pfw_prot_opts);
        int (*chk_dif_tags)(uint32_t tag);
        void (*add_target)(struct scsi_qla_host *);
+       void (*remove_target)(struct scsi_qla_host *);
 };
 
 int qla2x00_wait_for_hba_online(struct scsi_qla_host *);
-- 
2.12.0