3 files changed, 40 insertions, 57 deletions

diff --git a/drivers/firewire/fw-cdev.c b/drivers/firewire/fw-cdev.c
index 95a2075..7eb6594 100644
--- a/drivers/firewire/fw-cdev.c
+++ b/drivers/firewire/fw-cdev.c
@@ -522,7 +522,8 @@ static int init_request(struct client *client,
 	struct outbound_transaction_event *e;
 	int ret;
 
-	if (request->length > 4096 || request->length > 512 << speed)
+	if (request->tcode != TCODE_STREAM_DATA &&
+	    (request->length > 4096 || request->length > 512 << speed))
 		return -EIO;
 
 	e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL);
@@ -1247,36 +1248,27 @@ static int ioctl_send_broadcast_request(struct client *client, void *buffer)
 	return init_request(client, request, LOCAL_BUS | 0x3f, SCODE_100);
 }
 
-struct stream_packet {
-	struct fw_packet packet;
-	u8 data[0];
-};
-
-static void send_stream_packet_done(struct fw_packet *packet,
-				    struct fw_card *card, int status)
-{
-	kfree(container_of(packet, struct stream_packet, packet));
-}
-
 static int ioctl_send_stream_packet(struct client *client, void *buffer)
 {
-	struct fw_cdev_send_stream_packet *request = buffer;
-	struct stream_packet *p;
+	struct fw_cdev_send_stream_packet *p = buffer;
+	struct fw_cdev_send_request request;
+	int dest;
 
-	p = kmalloc(sizeof(*p) + request->size, GFP_KERNEL);
-	if (p == NULL)
-		return -ENOMEM;
+	if (p->speed > client->device->card->link_speed ||
+	    p->length > 1024 << p->speed)
+		return -EIO;
 
-	if (request->data &&
-	    copy_from_user(p->data, u64_to_uptr(request->data), request->size)) {
-		kfree(p);
-		return -EFAULT;
-	}
-	fw_send_stream_packet(client->device->card, &p->packet,
-			      request->generation, request->speed,
-			      request->channel, request->sy, request->tag,
-			      p->data, request->size, send_stream_packet_done);
-	return 0;
+	if (p->tag > 3 || p->channel > 63 || p->sy > 15)
+		return -EINVAL;
+
+	dest = fw_stream_packet_destination_id(p->tag, p->channel, p->sy);
+	request.tcode		= TCODE_STREAM_DATA;
+	request.length		= p->length;
+	request.closure		= p->closure;
+	request.data		= p->data;
+	request.generation	= p->generation;
+
+	return init_request(client, &request, dest, p->speed);
 }
 
 static int (* const ioctl_handlers[])(struct client *client, void *buffer) = {
diff --git a/drivers/firewire/fw-transaction.c b/drivers/firewire/fw-transaction.c
index e3da589..4a9b374 100644
--- a/drivers/firewire/fw-transaction.c
+++ b/drivers/firewire/fw-transaction.c
@@ -37,10 +37,6 @@
 #include "fw-topology.h"
 #include "fw-device.h"
 
-#define HEADER_TAG(tag)			((tag) << 14)
-#define HEADER_CHANNEL(ch)		((ch) << 8)
-#define HEADER_SY(sy)			((sy) << 0)
-
 #define HEADER_PRI(pri)			((pri) << 0)
 #define HEADER_TCODE(tcode)		((tcode) << 4)
 #define HEADER_RETRY(retry)		((retry) << 8)
@@ -158,6 +154,18 @@ static void fw_fill_request(struct fw_packet *packet, int tcode, int tlabel,
 {
 	int ext_tcode;
 
+	if (tcode == TCODE_STREAM_DATA) {
+		packet->header[0] =
+			HEADER_DATA_LENGTH(length) |
+			destination_id |
+			HEADER_TCODE(TCODE_STREAM_DATA);
+		packet->header_length = 4;
+		packet->payload = payload;
+		packet->payload_length = length;
+
+		goto common;
+	}
+
 	if (tcode > 0x10) {
 		ext_tcode = tcode & ~0x10;
 		tcode = TCODE_LOCK_REQUEST;
@@ -204,7 +212,7 @@ static void fw_fill_request(struct fw_packet *packet, int tcode, int tlabel,
 		packet->payload_length = 0;
 		break;
 	}
-
+ common:
 	packet->speed = speed;
 	packet->generation = generation;
 	packet->ack = 0;
@@ -246,6 +254,9 @@ static void fw_fill_request(struct fw_packet *packet, int tcode, int tlabel,
  * @param callback function to be called when the transaction is completed
  * @param callback_data pointer to arbitrary data, which will be
  *   passed to the callback
+ *
+ * In case of asynchronous stream packets i.e. TCODE_STREAM_DATA, the caller
+ * needs to synthesize @destination_id with fw_stream_packet_destination_id().
  */
 void fw_send_request(struct fw_card *card, struct fw_transaction *t, int tcode,
 		     int destination_id, int generation, int speed,
@@ -297,27 +308,6 @@ void fw_send_request(struct fw_card *card, struct fw_transaction *t, int tcode,
 }
 EXPORT_SYMBOL(fw_send_request);
 
-void fw_send_stream_packet(struct fw_card *card, struct fw_packet *p,
-		int generation, int speed, int channel, int sy, int tag,
-		void *payload, size_t length, fw_packet_callback_t callback)
-{
-	p->callback = callback;
-	p->header[0] =
-		  HEADER_DATA_LENGTH(length)
-		| HEADER_TAG(tag)
-		| HEADER_CHANNEL(channel)
-		| HEADER_TCODE(TCODE_STREAM_DATA)
-		| HEADER_SY(sy);
-	p->header_length = 4;
-	p->payload = payload;
-	p->payload_length = length;
-	p->speed = speed;
-	p->generation = generation;
-	p->ack = 0;
-
-	card->driver->send_request(card, p);
-}
-
 struct transaction_callback_data {
 	struct completion done;
 	void *payload;
diff --git a/drivers/firewire/fw-transaction.h b/drivers/firewire/fw-transaction.h
index f90f09c..d4f42ce 100644
--- a/drivers/firewire/fw-transaction.h
+++ b/drivers/firewire/fw-transaction.h
@@ -412,10 +412,6 @@ void fw_send_request(struct fw_card *card, struct fw_transaction *t,
 		int tcode, int destination_id, int generation, int speed,
 		unsigned long long offset, void *payload, size_t length,
 		fw_transaction_callback_t callback, void *callback_data);
-void fw_send_stream_packet(struct fw_card *card, struct fw_packet *p,
-		int generation, int speed, int channel, int sy, int tag,
-		void *payload, size_t length, fw_packet_callback_t callback);
-
 int fw_cancel_transaction(struct fw_card *card,
 			  struct fw_transaction *transaction);
 void fw_flush_transactions(struct fw_card *card);
@@ -425,6 +421,11 @@ int fw_run_transaction(struct fw_card *card, int tcode, int destination_id,
 void fw_send_phy_config(struct fw_card *card,
 			int node_id, int generation, int gap_count);
 
+static inline int fw_stream_packet_destination_id(int tag, int channel, int sy)
+{
+	return tag << 14 | channel << 8 | sy;
+}
+
 /*
  * Called by the topology code to inform the device code of node
  * activity; found, lost, or updated nodes.