From: James Smart <jsmart2021@gmail.com>
Date: Tue, 31 Mar 2020 09:49:56 -0700
Subject: [PATCH] nvmet-fc: perform small cleanups on unneeded checks
Git-commit: e72914f70db194d98ade0711b088fd062a72c033
Git-repo: git://git.infradead.org/nvme.git
Patch-mainline: Queued in subsystem maintainer repository
References: bsc#1169045

While code reviewing saw a couple of items that can be cleaned up:
- In nvmet_fc_delete_target_queue(), the routine unlocks, then checks
  and relocks.  Reorganize to avoid the unlock/relock.
- In nvmet_fc_delete_target_queue(), there's a check on the disconnect
  state that is unnecessary as the routine validates the state before
  starting any action.

Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Hannes Reinecke <hare@suse.com>
---
 drivers/nvme/target/fc.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/drivers/nvme/target/fc.c b/drivers/nvme/target/fc.c
index a91c443c9098..01488fc35d46 100644
--- a/drivers/nvme/target/fc.c
+++ b/drivers/nvme/target/fc.c
@@ -677,7 +677,7 @@ nvmet_fc_delete_target_queue(struct nvmet_fc_tgt_queue *queue)
 	struct nvmet_fc_fcp_iod *fod = queue->fod;
 	struct nvmet_fc_defer_fcp_req *deferfcp, *tempptr;
 	unsigned long flags;
-	int i, writedataactive;
+	int i;
 	bool disconnect;
 
 	disconnect = atomic_xchg(&queue->connected, 0);
@@ -688,20 +688,18 @@ nvmet_fc_delete_target_queue(struct nvmet_fc_tgt_queue *queue)
 		if (fod->active) {
 			spin_lock(&fod->flock);
 			fod->abort = true;
-			writedataactive = fod->writedataactive;
-			spin_unlock(&fod->flock);
 			/*
 			 * only call lldd abort routine if waiting for
 			 * writedata. other outstanding ops should finish
 			 * on their own.
 			 */
-			if (writedataactive) {
-				spin_lock(&fod->flock);
+			if (fod->writedataactive) {
 				fod->aborted = true;
 				spin_unlock(&fod->flock);
 				tgtport->ops->fcp_abort(
 					&tgtport->fc_target_port, fod->fcpreq);
-			}
+			} else
+				spin_unlock(&fod->flock);
 		}
 	}
 
@@ -741,8 +739,7 @@ nvmet_fc_delete_target_queue(struct nvmet_fc_tgt_queue *queue)
 
 	flush_workqueue(queue->work_q);
 
-	if (disconnect)
-		nvmet_sq_destroy(&queue->nvme_sq);
+	nvmet_sq_destroy(&queue->nvme_sq);
 
 	nvmet_fc_tgt_q_put(queue);
 }
-- 
2.16.4