linux-kernel - [PATCH] sound/core/seq: remove dead code

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Message-Id: <20201102071154.23563-1-yuhaobehappy@gmail.com>
Date:   Sun,  1 Nov 2020 23:11:54 -0800
From:   Yu Hao <yuhaobehappy@...il.com>
To:     perex@...ex.cz, tiwai@...e.com, alsa-devel@...a-project.org
Cc:     yuhaobehappy@...il.com, linux-kernel@...r.kernel.org
Subject: [PATCH] sound/core/seq: remove dead code

The function snd_seq_queue_client_termination() is only called from
function seq_free_client1(). The seq_free_client1() calls function
snd_seq_queue_client_leave(), which deletes all objects whose owner
equals to client->number in global array queue_list, before the function
snd_seq_queue_client_termination(), which checks whether there are
any objects in global array queue_list whose owner equals to
client->number, with the same argument client->number. So
the checking code in function snd_seq_queue_client_termination() is
dead code. Remove those dead code.

Signed-off-by: Yu Hao <yuhaobehappy@...il.com>
---
 sound/core/seq/seq_queue.c | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/sound/core/seq/seq_queue.c b/sound/core/seq/seq_queue.c
index 71a6ea62c3be..91b3f3295d0b 100644
--- a/sound/core/seq/seq_queue.c
+++ b/sound/core/seq/seq_queue.c
@@ -545,21 +545,10 @@ void snd_seq_queue_client_termination(int client)
 	unsigned long flags;
 	int i;
 	struct snd_seq_queue *q;
-	bool matched;

 	for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) {
 		if ((q = queueptr(i)) == NULL)
 			continue;
-		spin_lock_irqsave(&q->owner_lock, flags);
-		matched = (q->owner == client);
-		if (matched)
-			q->klocked = 1;
-		spin_unlock_irqrestore(&q->owner_lock, flags);
-		if (matched) {
-			if (q->timer->running)
-				snd_seq_timer_stop(q->timer);
-			snd_seq_timer_reset(q->timer);
-		}
 		queuefree(q);
 	}
 }
-- 
2.17.1