[PATCH V4 6/9] null_blk: clean up null_del_dev() to use cached dev pointer

[Zizhi Wo]

From: Zizhi Wo <wozizhi@xxxxxxxxxx>

Replace remaining nullb->dev dereferences with the already-cached
local dev variable. No functional change.

Signed-off-by: Zizhi Wo <wozizhi@xxxxxxxxxx>
---
 drivers/block/null_blk/main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c
index a75989220a2f..6d30591abb28 100644
--- a/drivers/block/null_blk/main.c
+++ b/drivers/block/null_blk/main.c
@@ -1767,11 +1767,11 @@ static void null_del_dev(struct nullb *nullb)
 
 	list_del_init(&nullb->list);
 
 	del_gendisk(nullb->disk);
 
-	if (test_bit(NULLB_DEV_FL_THROTTLED, &nullb->dev->flags)) {
+	if (test_bit(NULLB_DEV_FL_THROTTLED, &dev->flags)) {
 		hrtimer_cancel(&nullb->bw_timer);
 		atomic_long_set(&nullb->cur_bytes, LONG_MAX);
 		blk_mq_start_stopped_hw_queues(nullb->q, true);
 	}
 
@@ -1779,11 +1779,11 @@ static void null_del_dev(struct nullb *nullb)
 	null_free_zoned_dev(dev);
 	if (nullb->tag_set == &nullb->__tag_set)
 		blk_mq_free_tag_set(nullb->tag_set);
 	kfree(nullb->queues);
 	if (null_cache_active(nullb))
-		null_free_device_storage(nullb->dev, true);
+		null_free_device_storage(dev, true);
 	kfree(nullb);
 	dev->nullb = NULL;
 }
 
 static void null_config_discard(struct nullb *nullb, struct queue_limits *lim)
-- 
2.52.0