[PATCH v2 4/4] staging: greybus: split gb_audio_gb_get_topology into helper functions

[Ganesh Kumar Pittala <ganeshkpittala@gmail.com>]

This patch addresses the TODO in gb_audio_gb_get_topology() by
splitting its logic into two smaller internal helper functions:
  - gb_audio_get_topology_size()
  - gb_audio_read_topology()

This improves modularity and readability while preserving the
original behavior and interface.

Signed-off-by: Ganesh Kumar Pittala <ganeshkpittala@gmail.com>
---
 drivers/staging/greybus/audio_gb.c | 36 +++++++++++++++++++++++-------
 1 file changed, 28 insertions(+), 8 deletions(-)

diff --git a/drivers/staging/greybus/audio_gb.c b/drivers/staging/greybus/audio_gb.c
index 9d8994fdb41a..92cfd1a6fc10 100644
--- a/drivers/staging/greybus/audio_gb.c
+++ b/drivers/staging/greybus/audio_gb.c
@@ -8,21 +8,28 @@
 #include <linux/greybus.h>
 #include "audio_codec.h"
 
-/* TODO: Split into separate calls */
-int gb_audio_gb_get_topology(struct gb_connection *connection,
-			     struct gb_audio_topology **topology)
+static int gb_audio_gb_get_topology_size(struct gb_connection *connection,
+					 u16 *size)
 {
-	struct gb_audio_get_topology_size_response size_resp;
-	struct gb_audio_topology *topo;
-	u16 size;
+	struct gb_audio_get_topology_size_response resp;
 	int ret;
 
 	ret = gb_operation_sync(connection, GB_AUDIO_TYPE_GET_TOPOLOGY_SIZE,
-				NULL, 0, &size_resp, sizeof(size_resp));
+				NULL, 0, &resp, sizeof(resp));
 	if (ret)
 		return ret;
 
-	size = le16_to_cpu(size_resp.size);
+	*size = le16_to_cpu(resp.size);
+	return 0;
+}
+
+static int gb_audio_gb_read_topology(struct gb_connection *connection,
+				     struct gb_audio_topology **topology,
+				     u16 size)
+{
+	struct gb_audio_topology *topo;
+	int ret;
+
 	if (size < sizeof(*topo))
 		return -ENODATA;
 
@@ -41,6 +48,19 @@ int gb_audio_gb_get_topology(struct gb_connection *connection,
 
 	return 0;
 }
+
+int gb_audio_gb_get_topology(struct gb_connection *connection,
+			     struct gb_audio_topology **topology)
+{
+	u16 size;
+	int ret;
+
+	ret = gb_audio_gb_get_topology_size(connection, &size);
+	if (ret)
+		return ret;
+
+	return gb_audio_gb_read_topology(connection, topology, size);
+}
 EXPORT_SYMBOL_GPL(gb_audio_gb_get_topology);
 
 int gb_audio_gb_get_control(struct gb_connection *connection,
-- 
2.43.0