[PATCH v2] staging: greybus: Refactor gb_audio_gb_get_topology() into separate calls

[Madhumitha Prabakaran]

Refactor gb_audio_gb_get_topology() into separate calls for better modularity

Signed-off-by: Madhumitha Prabakaran <madhumithabiw@xxxxxxxxx>
----
Changes in v2:
Include prototype in the /audio_codec.h, as
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202308050511.y5Yb9otW-lkp@xxxxxxxxx/
---
 drivers/staging/greybus/audio_codec.h |  4 ++
 drivers/staging/greybus/audio_gb.c    | 67 +++++++++++++++++----------
 2 files changed, 46 insertions(+), 25 deletions(-)

diff --git a/drivers/staging/greybus/audio_codec.h b/drivers/staging/greybus/audio_codec.h
index ce15e800e607..356143f3e241 100644
--- a/drivers/staging/greybus/audio_codec.h
+++ b/drivers/staging/greybus/audio_codec.h
@@ -176,7 +176,11 @@ int gbaudio_module_update(struct gbaudio_codec_info *codec,
 int gbaudio_register_module(struct gbaudio_module_info *module);
 void gbaudio_unregister_module(struct gbaudio_module_info *module);
 
+struct gb_audio_topology *gb_audio_gb_alloc_topology(u16 size);
+
 /* protocol related */
+int gb_audio_gb_get_topology_size(struct gb_connection *connection,
+                 u16 *size);
 int gb_audio_gb_get_topology(struct gb_connection *connection,
 			     struct gb_audio_topology **topology);
 int gb_audio_gb_get_control(struct gb_connection *connection,
diff --git a/drivers/staging/greybus/audio_gb.c b/drivers/staging/greybus/audio_gb.c
index 9d8994fdb41a..a48ddadd6f1e 100644
--- a/drivers/staging/greybus/audio_gb.c
+++ b/drivers/staging/greybus/audio_gb.c
@@ -8,39 +8,56 @@
 #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)
+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;
-	int ret;
+    struct gb_audio_get_topology_size_response size_resp;
+    int ret;
 
-	ret = gb_operation_sync(connection, GB_AUDIO_TYPE_GET_TOPOLOGY_SIZE,
-				NULL, 0, &size_resp, sizeof(size_resp));
-	if (ret)
-		return ret;
+    ret = gb_operation_sync(connection, GB_AUDIO_TYPE_GET_TOPOLOGY_SIZE,
+                            NULL, 0, &size_resp, sizeof(size_resp));
+    if (ret)
+        return ret;
 
-	size = le16_to_cpu(size_resp.size);
-	if (size < sizeof(*topo))
-		return -ENODATA;
+    *size = le16_to_cpu(size_resp.size);
+    return 0;
+}
 
-	topo = kzalloc(size, GFP_KERNEL);
-	if (!topo)
-		return -ENOMEM;
+struct gb_audio_topology *gb_audio_gb_alloc_topology(u16 size)
+{
+    struct gb_audio_topology *topo;
 
-	ret = gb_operation_sync(connection, GB_AUDIO_TYPE_GET_TOPOLOGY, NULL, 0,
-				topo, size);
-	if (ret) {
-		kfree(topo);
-		return ret;
-	}
+    if (size < sizeof(struct gb_audio_topology))
+        return NULL;
 
-	*topology = topo;
+    topo = kzalloc(size, GFP_KERNEL);
+    return topo;
+}
 
-	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;
+
+    *topology = gb_audio_gb_alloc_topology(size);
+    if (!*topology)
+        return -ENOMEM;
+
+    ret = gb_operation_sync(connection, GB_AUDIO_TYPE_GET_TOPOLOGY,
+                            NULL, 0, *topology, size);
+    if (ret) {
+        kfree(*topology);
+        *topology = NULL;
+        return ret;
+    }
+
+    return 0;
 }
+
 EXPORT_SYMBOL_GPL(gb_audio_gb_get_topology);
 
 int gb_audio_gb_get_control(struct gb_connection *connection,
-- 
2.25.1