target: Convert se_tpg->acl_node_lock to ->acl_node_mutex

This patch converts se_tpg->acl_node_lock to struct mutex, so that
->acl_node_acl walkers in core_clear_lun_from_tpg() can block when
calling core_disable_device_list_for_node().

It also updates core_dev_add_lun() to hold ->acl_node_mutex when
calling core_tpg_add_node_to_devs() to build ->lun_entry_hlist
for dynamically generated se_node_acl.

Reviewed-by: Hannes Reinecke <hare@suse.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/target/tcm_fc/tfc_conf.c b/drivers/target/tcm_fc/tfc_conf.c
index ee5653139417..8e1a54f2642c 100644
--- a/drivers/target/tcm_fc/tfc_conf.c
+++ b/drivers/target/tcm_fc/tfc_conf.c
@@ -217,7 +217,7 @@ struct ft_node_acl *ft_acl_get(struct ft_tpg *tpg, struct fc_rport_priv *rdata)
 	struct se_portal_group *se_tpg = &tpg->se_tpg;
 	struct se_node_acl *se_acl;
 
-	spin_lock_irq(&se_tpg->acl_node_lock);
+	mutex_lock(&se_tpg->acl_node_mutex);
 	list_for_each_entry(se_acl, &se_tpg->acl_node_list, acl_list) {
 		acl = container_of(se_acl, struct ft_node_acl, se_node_acl);
 		pr_debug("acl %p port_name %llx\n",
@@ -231,7 +231,7 @@ struct ft_node_acl *ft_acl_get(struct ft_tpg *tpg, struct fc_rport_priv *rdata)
 			break;
 		}
 	}
-	spin_unlock_irq(&se_tpg->acl_node_lock);
+	mutex_unlock(&se_tpg->acl_node_mutex);
 	return found;
 }