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| author |   Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2019-08-04 15:21:21 +0900 |
|---|---|---|
| committer |   Takashi Iwai <tiwai@suse.de> | 2019-08-05 19:57:17 +0200 |
| commit | 6261f90bdb0b605ffb158717ec7a03b1753aded5 (patch) | |
| tree | 04417675b43bbf3bb14b1aa8e2ac6f0c8e54c7fd /sound/firewire | |
| parent | ALSA: firewire-lib: add AMDTP domain structure to handle several isoc contexts (diff) | |
| download | linux-dev-6261f90bdb0b605ffb158717ec7a03b1753aded5.tar.xz linux-dev-6261f90bdb0b605ffb158717ec7a03b1753aded5.zip | |
ALSA: firewire-lib: add a kernel API to stop a couple of AMDTP streams in AMDTP domain
This commit adds a kernel API to stop a couple of isochronous contexts
for AMDTP streams. The API is not protected with any lock primitive.
Callers should use this with enough lock against concurrent access.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire')
| -rw-r--r-- | sound/firewire/amdtp-stream.c | 16 | ||||
| -rw-r--r-- | sound/firewire/amdtp-stream.h | 5 |
2 files changed, 21 insertions, 0 deletions
diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c index 02077696fa77..31fc90f76443 100644 --- a/sound/firewire/amdtp-stream.c +++ b/sound/firewire/amdtp-stream.c @@ -1158,3 +1158,19 @@ void amdtp_domain_destroy(struct amdtp_domain *d) WARN_ON(!list_empty(&d->streams)); } EXPORT_SYMBOL_GPL(amdtp_domain_destroy); + +/** + * amdtp_domain_stop - stop sending packets for isoc context in the same domain. + * @d: the AMDTP domain to which the isoc contexts belong. + */ +void amdtp_domain_stop(struct amdtp_domain *d) +{ + struct amdtp_stream *s, *next; + + list_for_each_entry_safe(s, next, &d->streams, list) { + list_del(&s->list); + + amdtp_stream_stop(s); + } +} +EXPORT_SYMBOL_GPL(amdtp_domain_stop); diff --git a/sound/firewire/amdtp-stream.h b/sound/firewire/amdtp-stream.h index 2378db4b4195..ab2a69180240 100644 --- a/sound/firewire/amdtp-stream.h +++ b/sound/firewire/amdtp-stream.h @@ -170,6 +170,9 @@ struct amdtp_stream { /* For backends to process data blocks. */ void *protocol; amdtp_stream_process_ctx_payloads_t process_ctx_payloads; + + // For domain. + struct list_head list; }; int amdtp_stream_init(struct amdtp_stream *s, struct fw_unit *unit, @@ -274,4 +277,6 @@ struct amdtp_domain { int amdtp_domain_init(struct amdtp_domain *d); void amdtp_domain_destroy(struct amdtp_domain *d); +void amdtp_domain_stop(struct amdtp_domain *d); + #endif |