From patchwork Tue Apr 9 17:00:18 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Takashi Iwai X-Patchwork-Id: 10891795 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 74E3517E6 for ; Tue, 9 Apr 2019 17:02:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5B5842891F for ; Tue, 9 Apr 2019 17:02:22 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4FA1C2892B; Tue, 9 Apr 2019 17:02:22 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 485A72891F for ; Tue, 9 Apr 2019 17:02:21 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 9A70791E; Tue, 9 Apr 2019 19:01:28 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 9A70791E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1554829338; bh=qVXk7poMw9LB1W1TUoO7mDN7M0u0FFr50qV751kHN4I=; h=From:To:Date:In-Reply-To:References:Subject:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=l/b6N65CP18kQsFKYy9iWBCaJoS43FyBUp3kQ91GFhoBFJ3tyXyNHI3r5u43fq9Ab eBwSpudAu89fsPL+Xe+KlQiOoC1V+pX6AqwlDlGrEomUa+bwq8n8Al4KTunOK6xRrM /B3F8vUkoU4Q2eudu6E8fyyuJ0YmnftWd9YRuvpM= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id EA560F89720; Tue, 9 Apr 2019 19:00:36 +0200 (CEST) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa1.perex.cz (Postfix, from userid 50401) id 0E335F89610; Tue, 9 Apr 2019 19:00:30 +0200 (CEST) Received: from mx1.suse.de (mx2.suse.de [195.135.220.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 2F66DF89625 for ; Tue, 9 Apr 2019 19:00:24 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 2F66DF89625 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 8D7A1B06B for ; Tue, 9 Apr 2019 17:00:23 +0000 (UTC) From: Takashi Iwai To: alsa-devel@alsa-project.org Date: Tue, 9 Apr 2019 19:00:18 +0200 Message-Id: <20190409170020.20685-4-tiwai@suse.de> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20190409170020.20685-1-tiwai@suse.de> References: <20190409170020.20685-1-tiwai@suse.de> Subject: [alsa-devel] [PATCH 3/5] ALSA: seq: Remove superfluous irqsave flags X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" X-Virus-Scanned: ClamAV using ClamSMTP spin_lock_irqsave() is used unnecessarily in various places in sequencer core code although it's pretty obvious that the context is sleepable. Remove irqsave and use the plain spin_lock_irq() in such places for simplicity. Signed-off-by: Takashi Iwai --- sound/core/seq/seq_clientmgr.c | 19 ++++++++----------- sound/core/seq/seq_fifo.c | 10 ++++------ sound/core/seq/seq_memory.c | 16 +++++++--------- sound/core/seq/seq_ports.c | 15 ++++++--------- 4 files changed, 25 insertions(+), 35 deletions(-) diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c index 7d4640d1fe9f..933bde3843d9 100644 --- a/sound/core/seq/seq_clientmgr.c +++ b/sound/core/seq/seq_clientmgr.c @@ -203,7 +203,6 @@ int __init client_init_data(void) static struct snd_seq_client *seq_create_client1(int client_index, int poolsize) { - unsigned long flags; int c; struct snd_seq_client *client; @@ -224,7 +223,7 @@ static struct snd_seq_client *seq_create_client1(int client_index, int poolsize) mutex_init(&client->ioctl_mutex); /* find free slot in the client table */ - spin_lock_irqsave(&clients_lock, flags); + spin_lock_irq(&clients_lock); if (client_index < 0) { for (c = SNDRV_SEQ_DYNAMIC_CLIENTS_BEGIN; c < SNDRV_SEQ_MAX_CLIENTS; @@ -232,17 +231,17 @@ static struct snd_seq_client *seq_create_client1(int client_index, int poolsize) if (clienttab[c] || clienttablock[c]) continue; clienttab[client->number = c] = client; - spin_unlock_irqrestore(&clients_lock, flags); + spin_unlock_irq(&clients_lock); return client; } } else { if (clienttab[client_index] == NULL && !clienttablock[client_index]) { clienttab[client->number = client_index] = client; - spin_unlock_irqrestore(&clients_lock, flags); + spin_unlock_irq(&clients_lock); return client; } } - spin_unlock_irqrestore(&clients_lock, flags); + spin_unlock_irq(&clients_lock); snd_seq_pool_delete(&client->pool); kfree(client); return NULL; /* no free slot found or busy, return failure code */ @@ -251,23 +250,21 @@ static struct snd_seq_client *seq_create_client1(int client_index, int poolsize) static int seq_free_client1(struct snd_seq_client *client) { - unsigned long flags; - if (!client) return 0; - spin_lock_irqsave(&clients_lock, flags); + spin_lock_irq(&clients_lock); clienttablock[client->number] = 1; clienttab[client->number] = NULL; - spin_unlock_irqrestore(&clients_lock, flags); + spin_unlock_irq(&clients_lock); snd_seq_delete_all_ports(client); snd_seq_queue_client_leave(client->number); snd_use_lock_sync(&client->use_lock); snd_seq_queue_client_termination(client->number); if (client->pool) snd_seq_pool_delete(&client->pool); - spin_lock_irqsave(&clients_lock, flags); + spin_lock_irq(&clients_lock); clienttablock[client->number] = 0; - spin_unlock_irqrestore(&clients_lock, flags); + spin_unlock_irq(&clients_lock); return 0; } diff --git a/sound/core/seq/seq_fifo.c b/sound/core/seq/seq_fifo.c index 613ae10d33b8..97ee89cb6426 100644 --- a/sound/core/seq/seq_fifo.c +++ b/sound/core/seq/seq_fifo.c @@ -98,18 +98,17 @@ static struct snd_seq_event_cell *fifo_cell_out(struct snd_seq_fifo *f); void snd_seq_fifo_clear(struct snd_seq_fifo *f) { struct snd_seq_event_cell *cell; - unsigned long flags; /* clear overflow flag */ atomic_set(&f->overflow, 0); snd_use_lock_sync(&f->use_lock); - spin_lock_irqsave(&f->lock, flags); + spin_lock_irq(&f->lock); /* drain the fifo */ while ((cell = fifo_cell_out(f)) != NULL) { snd_seq_cell_free(cell); } - spin_unlock_irqrestore(&f->lock, flags); + spin_unlock_irq(&f->lock); } @@ -239,7 +238,6 @@ int snd_seq_fifo_poll_wait(struct snd_seq_fifo *f, struct file *file, /* change the size of pool; all old events are removed */ int snd_seq_fifo_resize(struct snd_seq_fifo *f, int poolsize) { - unsigned long flags; struct snd_seq_pool *newpool, *oldpool; struct snd_seq_event_cell *cell, *next, *oldhead; @@ -255,7 +253,7 @@ int snd_seq_fifo_resize(struct snd_seq_fifo *f, int poolsize) return -ENOMEM; } - spin_lock_irqsave(&f->lock, flags); + spin_lock_irq(&f->lock); /* remember old pool */ oldpool = f->pool; oldhead = f->head; @@ -265,7 +263,7 @@ int snd_seq_fifo_resize(struct snd_seq_fifo *f, int poolsize) f->tail = NULL; f->cells = 0; /* NOTE: overflow flag is not cleared */ - spin_unlock_irqrestore(&f->lock, flags); + spin_unlock_irq(&f->lock); /* close the old pool and wait until all users are gone */ snd_seq_pool_mark_closing(oldpool); diff --git a/sound/core/seq/seq_memory.c b/sound/core/seq/seq_memory.c index ae0b8971f6ce..19b718e871c5 100644 --- a/sound/core/seq/seq_memory.c +++ b/sound/core/seq/seq_memory.c @@ -384,7 +384,6 @@ int snd_seq_pool_init(struct snd_seq_pool *pool) { int cell; struct snd_seq_event_cell *cellptr; - unsigned long flags; if (snd_BUG_ON(!pool)) return -EINVAL; @@ -395,9 +394,9 @@ int snd_seq_pool_init(struct snd_seq_pool *pool) return -ENOMEM; /* add new cells to the free cell list */ - spin_lock_irqsave(&pool->lock, flags); + spin_lock_irq(&pool->lock); if (pool->ptr) { - spin_unlock_irqrestore(&pool->lock, flags); + spin_unlock_irq(&pool->lock); kvfree(cellptr); return 0; } @@ -416,7 +415,7 @@ int snd_seq_pool_init(struct snd_seq_pool *pool) /* init statistics */ pool->max_used = 0; pool->total_elements = pool->size; - spin_unlock_irqrestore(&pool->lock, flags); + spin_unlock_irq(&pool->lock); return 0; } @@ -435,7 +434,6 @@ void snd_seq_pool_mark_closing(struct snd_seq_pool *pool) /* remove events */ int snd_seq_pool_done(struct snd_seq_pool *pool) { - unsigned long flags; struct snd_seq_event_cell *ptr; if (snd_BUG_ON(!pool)) @@ -449,18 +447,18 @@ int snd_seq_pool_done(struct snd_seq_pool *pool) schedule_timeout_uninterruptible(1); /* release all resources */ - spin_lock_irqsave(&pool->lock, flags); + spin_lock_irq(&pool->lock); ptr = pool->ptr; pool->ptr = NULL; pool->free = NULL; pool->total_elements = 0; - spin_unlock_irqrestore(&pool->lock, flags); + spin_unlock_irq(&pool->lock); kvfree(ptr); - spin_lock_irqsave(&pool->lock, flags); + spin_lock_irq(&pool->lock); pool->closing = 0; - spin_unlock_irqrestore(&pool->lock, flags); + spin_unlock_irq(&pool->lock); return 0; } diff --git a/sound/core/seq/seq_ports.c b/sound/core/seq/seq_ports.c index 24d90abfc64d..1e2239240f21 100644 --- a/sound/core/seq/seq_ports.c +++ b/sound/core/seq/seq_ports.c @@ -128,7 +128,6 @@ static void port_subs_info_init(struct snd_seq_port_subs_info *grp) struct snd_seq_client_port *snd_seq_create_port(struct snd_seq_client *client, int port) { - unsigned long flags; struct snd_seq_client_port *new_port, *p; int num = -1; @@ -157,7 +156,7 @@ struct snd_seq_client_port *snd_seq_create_port(struct snd_seq_client *client, num = port >= 0 ? port : 0; mutex_lock(&client->ports_mutex); - write_lock_irqsave(&client->ports_lock, flags); + write_lock_irq(&client->ports_lock); list_for_each_entry(p, &client->ports_list_head, list) { if (p->addr.port > num) break; @@ -169,7 +168,7 @@ struct snd_seq_client_port *snd_seq_create_port(struct snd_seq_client *client, client->num_ports++; new_port->addr.port = num; /* store the port number in the port */ sprintf(new_port->name, "port-%d", num); - write_unlock_irqrestore(&client->ports_lock, flags); + write_unlock_irq(&client->ports_lock); mutex_unlock(&client->ports_mutex); return new_port; @@ -283,11 +282,10 @@ static int port_delete(struct snd_seq_client *client, /* delete a port with the given port id */ int snd_seq_delete_port(struct snd_seq_client *client, int port) { - unsigned long flags; struct snd_seq_client_port *found = NULL, *p; mutex_lock(&client->ports_mutex); - write_lock_irqsave(&client->ports_lock, flags); + write_lock_irq(&client->ports_lock); list_for_each_entry(p, &client->ports_list_head, list) { if (p->addr.port == port) { /* ok found. delete from the list at first */ @@ -297,7 +295,7 @@ int snd_seq_delete_port(struct snd_seq_client *client, int port) break; } } - write_unlock_irqrestore(&client->ports_lock, flags); + write_unlock_irq(&client->ports_lock); mutex_unlock(&client->ports_mutex); if (found) return port_delete(client, found); @@ -308,7 +306,6 @@ int snd_seq_delete_port(struct snd_seq_client *client, int port) /* delete the all ports belonging to the given client */ int snd_seq_delete_all_ports(struct snd_seq_client *client) { - unsigned long flags; struct list_head deleted_list; struct snd_seq_client_port *port, *tmp; @@ -316,7 +313,7 @@ int snd_seq_delete_all_ports(struct snd_seq_client *client) * clear the port list in the client data. */ mutex_lock(&client->ports_mutex); - write_lock_irqsave(&client->ports_lock, flags); + write_lock_irq(&client->ports_lock); if (! list_empty(&client->ports_list_head)) { list_add(&deleted_list, &client->ports_list_head); list_del_init(&client->ports_list_head); @@ -324,7 +321,7 @@ int snd_seq_delete_all_ports(struct snd_seq_client *client) INIT_LIST_HEAD(&deleted_list); } client->num_ports = 0; - write_unlock_irqrestore(&client->ports_lock, flags); + write_unlock_irq(&client->ports_lock); /* remove each port in deleted_list */ list_for_each_entry_safe(port, tmp, &deleted_list, list) {