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@xxxxxxxxxxxxx>
---
sound/firewire/amdtp-stream.c | 16 ++++++++++++++++
sound/firewire/amdtp-stream.h | 5 +++++
2 files changed, 21 insertions(+)
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
--
2.20.1
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