From db67bb39eff0fc5db21f49f8ae93e67ed2c5fe01 Mon Sep 17 00:00:00 2001 From: Daniel Wagner Date: Thu, 4 Apr 2024 16:41:30 +0200 Subject: nvmet-fc: move RCU read lock to nvmet_fc_assoc_exists The RCU lock is only needed for the lookup loop and not for list_ad_tail_rcu call. Thus move it down the call chain into nvmet_fc_assoc_exists. While at it also fix the name typo of the function. Signed-off-by: Daniel Wagner Reviewed-by: Hannes Reinecke Signed-off-by: Keith Busch --- drivers/nvme/target/fc.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) (limited to 'drivers/nvme') diff --git a/drivers/nvme/target/fc.c b/drivers/nvme/target/fc.c index fd229f310c93..337ee1cb09ae 100644 --- a/drivers/nvme/target/fc.c +++ b/drivers/nvme/target/fc.c @@ -1115,16 +1115,21 @@ nvmet_fc_schedule_delete_assoc(struct nvmet_fc_tgt_assoc *assoc) } static bool -nvmet_fc_assoc_exits(struct nvmet_fc_tgtport *tgtport, u64 association_id) +nvmet_fc_assoc_exists(struct nvmet_fc_tgtport *tgtport, u64 association_id) { struct nvmet_fc_tgt_assoc *a; + bool found = false; + rcu_read_lock(); list_for_each_entry_rcu(a, &tgtport->assoc_list, a_list) { - if (association_id == a->association_id) - return true; + if (association_id == a->association_id) { + found = true; + break; + } } + rcu_read_unlock(); - return false; + return found; } static struct nvmet_fc_tgt_assoc * @@ -1164,13 +1169,11 @@ nvmet_fc_alloc_target_assoc(struct nvmet_fc_tgtport *tgtport, void *hosthandle) ran = ran << BYTES_FOR_QID_SHIFT; spin_lock_irqsave(&tgtport->lock, flags); - rcu_read_lock(); - if (!nvmet_fc_assoc_exits(tgtport, ran)) { + if (!nvmet_fc_assoc_exists(tgtport, ran)) { assoc->association_id = ran; list_add_tail_rcu(&assoc->a_list, &tgtport->assoc_list); done = true; } - rcu_read_unlock(); spin_unlock_irqrestore(&tgtport->lock, flags); } while (!done); -- cgit v1.2.3