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Commit 6261f90b authored by Takashi Sakamoto's avatar Takashi Sakamoto Committed by Takashi Iwai
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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: default avatarTakashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 3ec3d7a3

sound/firewire/amdtp-stream.c

+16 −0
Original line number Diff line number Diff line
@@ -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);

sound/firewire/amdtp-stream.h

+5 −0
Original line number Diff line number Diff line
@@ -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