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ALSA: seq: Allow system notification in atomic

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Currently the system notification helper assumes only the non-atomic
delivery.  For allowing an event delivery in non-atomic context, add
the atomic flag to the helper function.

This is a preliminary change for the support of UMP EP/FB
notification.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20250110155943.31578-8-tiwai@suse.de
This commit is contained in:
Takashi Iwai 2025-01-10 16:59:40 +01:00
parent aca5653595
commit 10a29de13b
3 changed files with 19 additions and 13 deletions
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2
sound/core/seq/seq_clientmgr.c
View file

@ -1476,7 +1476,7 @@ int snd_seq_client_notify_subscription(int client, int port,
event.data.connect.dest = info->dest;
event.data.connect.sender = info->sender;
return snd_seq_system_notify(client, port, &event); /* non-atomic */
return snd_seq_system_notify(client, port, &event, false); /* non-atomic */
}

9
sound/core/seq/seq_system.c
View file

@ -78,26 +78,27 @@ static int setheader(struct snd_seq_event * ev, int client, int port)
/* entry points for broadcasting system events */
void snd_seq_system_broadcast(int client, int port, int type)
void snd_seq_system_broadcast(int client, int port, int type, bool atomic)
{
struct snd_seq_event ev;
if (setheader(&ev, client, port) < 0)
return;
ev.type = type;
snd_seq_kernel_client_dispatch(sysclient, &ev, 0, 0);
snd_seq_kernel_client_dispatch(sysclient, &ev, atomic, 0);
}
EXPORT_SYMBOL_GPL(snd_seq_system_broadcast);
/* entry points for broadcasting system events */
int snd_seq_system_notify(int client, int port, struct snd_seq_event *ev)
int snd_seq_system_notify(int client, int port, struct snd_seq_event *ev,
bool atomic)
{
ev->flags = SNDRV_SEQ_EVENT_LENGTH_FIXED;
ev->source.client = sysclient;
ev->source.port = announce_port;
ev->dest.client = client;
ev->dest.port = port;
return snd_seq_kernel_client_dispatch(sysclient, ev, 0, 0);
return snd_seq_kernel_client_dispatch(sysclient, ev, atomic, 0);
}
/* call-back handler for timer events */

21
sound/core/seq/seq_system.h
View file

@ -10,16 +10,21 @@
/* entry points for broadcasting system events */
void snd_seq_system_broadcast(int client, int port, int type);
void snd_seq_system_broadcast(int client, int port, int type, bool atomic);
#define snd_seq_system_client_ev_client_start(client) snd_seq_system_broadcast(client, 0, SNDRV_SEQ_EVENT_CLIENT_START)
#define snd_seq_system_client_ev_client_exit(client) snd_seq_system_broadcast(client, 0, SNDRV_SEQ_EVENT_CLIENT_EXIT)
#define snd_seq_system_client_ev_client_change(client) snd_seq_system_broadcast(client, 0, SNDRV_SEQ_EVENT_CLIENT_CHANGE)
#define snd_seq_system_client_ev_port_start(client, port) snd_seq_system_broadcast(client, port, SNDRV_SEQ_EVENT_PORT_START)
#define snd_seq_system_client_ev_port_exit(client, port) snd_seq_system_broadcast(client, port, SNDRV_SEQ_EVENT_PORT_EXIT)
#define snd_seq_system_client_ev_port_change(client, port) snd_seq_system_broadcast(client, port, SNDRV_SEQ_EVENT_PORT_CHANGE)
/* normal system notification event broadcast */
#define notify_event(client, port, type) \
snd_seq_system_broadcast(client, port, type, false)
int snd_seq_system_notify(int client, int port, struct snd_seq_event *ev);
#define snd_seq_system_client_ev_client_start(client) notify_event(client, 0, SNDRV_SEQ_EVENT_CLIENT_START)
#define snd_seq_system_client_ev_client_exit(client) notify_event(client, 0, SNDRV_SEQ_EVENT_CLIENT_EXIT)
#define snd_seq_system_client_ev_client_change(client) notify_event(client, 0, SNDRV_SEQ_EVENT_CLIENT_CHANGE)
#define snd_seq_system_client_ev_port_start(client, port) notify_event(client, port, SNDRV_SEQ_EVENT_PORT_START)
#define snd_seq_system_client_ev_port_exit(client, port) notify_event(client, port, SNDRV_SEQ_EVENT_PORT_EXIT)
#define snd_seq_system_client_ev_port_change(client, port) notify_event(client, port, SNDRV_SEQ_EVENT_PORT_CHANGE)
int snd_seq_system_notify(int client, int port, struct snd_seq_event *ev,
bool atomic);
/* register our internal client */
int snd_seq_system_client_init(void);