firewire: fw_send_request_sync()

Share code between fw_send_request + wait_for_completion callers.

Signed-off-by: Jay Fenlason <fenlason@redhat.com>

Addendum:
Removes an unnecessary struct and an ununsed retry loop.
Calls it fw_run_transaction() instead of fw_send_request_sync().

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Acked-by: Kristian Høgsberg <krh@redhat.com>

1 files changed, 6 insertions, 31 deletions

diff --git a/drivers/firewire/fw-device.c b/drivers/firewire/fw-device.c
index 0855fb5..3fccdd4 100644
--- a/drivers/firewire/fw-device.c
+++ b/drivers/firewire/fw-device.c
@@ -381,46 +381,21 @@ static struct device_attribute fw_device_attributes[] = {
 	__ATTR_NULL,
 };
 
-struct read_quadlet_callback_data {
-	struct completion done;
-	int rcode;
-	u32 data;
-};
-
-static void
-complete_transaction(struct fw_card *card, int rcode,
-		     void *payload, size_t length, void *data)
-{
-	struct read_quadlet_callback_data *callback_data = data;
-
-	if (rcode == RCODE_COMPLETE)
-		callback_data->data = be32_to_cpu(*(__be32 *)payload);
-	callback_data->rcode = rcode;
-	complete(&callback_data->done);
-}
-
 static int
 read_rom(struct fw_device *device, int generation, int index, u32 *data)
 {
-	struct read_quadlet_callback_data callback_data;
-	struct fw_transaction t;
-	u64 offset;
+	int rcode;
 
 	/* device->node_id, accessed below, must not be older than generation */
 	smp_rmb();
 
-	init_completion(&callback_data.done);
-
-	offset = (CSR_REGISTER_BASE | CSR_CONFIG_ROM) + index * 4;
-	fw_send_request(device->card, &t, TCODE_READ_QUADLET_REQUEST,
+	rcode = fw_run_transaction(device->card, TCODE_READ_QUADLET_REQUEST,
 			device->node_id, generation, device->max_speed,
-			offset, NULL, 4, complete_transaction, &callback_data);
-
-	wait_for_completion(&callback_data.done);
-
-	*data = callback_data.data;
+			(CSR_REGISTER_BASE | CSR_CONFIG_ROM) + index * 4,
+			data, 4);
+	be32_to_cpus(data);
 
-	return callback_data.rcode;
+	return rcode;
 }
 
 #define READ_BIB_ROM_SIZE	256