From 785639b5bf2a87eaf0cda14baaa068b3728c7be2 Mon Sep 17 00:00:00 2001 From: Cássio Gabriel Date: Mon, 16 Mar 2026 10:39:38 -0300 Subject: ALSA: timer: keep a list of open masters for slave lookup MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit snd_timer_check_slave() still walks all registered timers and all open timer instances to find a matching master for a newly opened slave. Maintain a global list of open master instances that can accept slave links and use it for the slave lookup path instead. This keeps the existing matching semantics while avoiding the nested walk over snd_timer_list and each timer open_list_head. The reverse path in snd_timer_check_master() already scans only the pending slave list, so this makes both lookup paths closer in shape without changing the master/slave linking logic. Signed-off-by: Cássio Gabriel Link: https://patch.msgid.link/20260316-alsa-timer-master-list-v1-1-fb95e547110a@gmail.com Signed-off-by: Takashi Iwai --- include/sound/timer.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include') diff --git a/include/sound/timer.h b/include/sound/timer.h index 760e132cc0cd..83bafe70cf33 100644 --- a/include/sound/timer.h +++ b/include/sound/timer.h @@ -102,6 +102,7 @@ struct snd_timer_instance { unsigned int slave_id; struct list_head open_list; struct list_head active_list; + struct list_head master_list; struct list_head ack_list; struct list_head slave_list_head; struct list_head slave_active_head; -- cgit v1.2.3