linux-kernel - [GIT PULL 36/37] lightnvm: pblk: remove some unnecessary NULL checks

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Message-Id: <20180329220524.30363-37-mb@lightnvm.io>
Date:   Fri, 30 Mar 2018 00:05:23 +0200
From:   Matias Bjørling <mb@...htnvm.io>
To:     axboe@...com
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        keith.busch@...el.com, javier@...xlabs.com,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Matias Bjørling <mb@...htnvm.io>
Subject: [GIT PULL 36/37] lightnvm: pblk: remove some unnecessary NULL checks

From: Dan Carpenter <dan.carpenter@...cle.com>

Smatch complains that flush_workqueue() dereferences the work queue
pointer but then we check if it's NULL on the next line when it's too
late.  These NULL checks can be removed because the module won't load if
we can't allocate the work queues.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Matias Bjørling <mb@...htnvm.io>
---
 drivers/lightnvm/pblk-gc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/lightnvm/pblk-gc.c b/drivers/lightnvm/pblk-gc.c
index 7143b0f740fb..6851a5c67189 100644
--- a/drivers/lightnvm/pblk-gc.c
+++ b/drivers/lightnvm/pblk-gc.c
@@ -664,12 +664,10 @@ void pblk_gc_exit(struct pblk *pblk)
 		kthread_stop(gc->gc_reader_ts);
 
 	flush_workqueue(gc->gc_reader_wq);
-	if (gc->gc_reader_wq)
-		destroy_workqueue(gc->gc_reader_wq);
+	destroy_workqueue(gc->gc_reader_wq);
 
 	flush_workqueue(gc->gc_line_reader_wq);
-	if (gc->gc_line_reader_wq)
-		destroy_workqueue(gc->gc_line_reader_wq);
+	destroy_workqueue(gc->gc_line_reader_wq);
 
 	if (gc->gc_writer_ts)
 		kthread_stop(gc->gc_writer_ts);
-- 
2.11.0