From 28638887f351d11867562322b7abaa014dd5528a Mon Sep 17 00:00:00 2001 From: Roland Dreier Date: Tue, 16 Aug 2011 09:40:01 -0700 Subject: target: Convert acl_node_lock to be IRQ-disabling With qla2xxx, acl_node_lock is taken inside qla2xxx's hardware_lock, which is taken in hardirq context. This means acl_node_lock must become an IRQ-disabling lock; in particular this fixes lockdep warnings along the lines of ====================================================== [ INFO: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected ] (&(&se_tpg->acl_node_lock)->rlock){+.....}, at: [] transport_deregister_session+0x92/0x140 [target_core_mod] and this task is already holding: (&(&ha->hardware_lock)->rlock){-.-...}, at: [] qla_tgt_stop_phase1+0x57/0x2c0 [qla2xxx] which would create a new lock dependency: (&(&ha->hardware_lock)->rlock){-.-...} -> (&(&se_tpg->acl_node_lock)->rlock){+.....} but this new dependency connects a HARDIRQ-irq-safe lock: (&(&ha->hardware_lock)->rlock){-.-...} to a HARDIRQ-irq-unsafe lock: (&(&se_tpg->acl_node_lock)->rlock){+.....} Signed-off-by: Roland Dreier Signed-off-by: Nicholas Bellinger --- drivers/target/tcm_fc/tfc_conf.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/target/tcm_fc') diff --git a/drivers/target/tcm_fc/tfc_conf.c b/drivers/target/tcm_fc/tfc_conf.c index 520a8baae79..b15879d43e2 100644 --- a/drivers/target/tcm_fc/tfc_conf.c +++ b/drivers/target/tcm_fc/tfc_conf.c @@ -256,7 +256,7 @@ 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_bh(&se_tpg->acl_node_lock); + spin_lock_irq(&se_tpg->acl_node_lock); 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", @@ -270,7 +270,7 @@ struct ft_node_acl *ft_acl_get(struct ft_tpg *tpg, struct fc_rport_priv *rdata) break; } } - spin_unlock_bh(&se_tpg->acl_node_lock); + spin_unlock_irq(&se_tpg->acl_node_lock); return found; } -- cgit v1.2.3