[PATCH] staging: greybus: extract a fxn to improve clarity

[Mark Thomas Heim <questioneight@gmail.com>]

The gb_audio_gb_get_topology function at the top of the file
needs to be split per a TODO comment above the function. It
is necessary to refactor the code to pull out a method
that has fewer parameters to improve readability. A
prototype for the new function is now in the relevant header,
and the simpler function calls replace the old ones.

Signed-off-by: Mark Thomas Heim <questioneight@gmail.com>
---
 drivers/staging/greybus/audio_codec.h |  2 ++
 drivers/staging/greybus/audio_gb.c    | 21 +++++++++++----------
 2 files changed, 13 insertions(+), 10 deletions(-)

diff --git a/drivers/staging/greybus/audio_codec.h b/drivers/staging/greybus/audio_codec.h
index ce15e800e607..a2e8361952b8 100644
--- a/drivers/staging/greybus/audio_codec.h
+++ b/drivers/staging/greybus/audio_codec.h
@@ -177,6 +177,8 @@ int gbaudio_register_module(struct gbaudio_module_info *module);
 void gbaudio_unregister_module(struct gbaudio_module_info *module);
 
 /* protocol related */
+int fetch_gb_audio_data(struct gb_connection *connection, int type,
+			void *response, int response_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..3c924d13f0e7 100644
--- a/drivers/staging/greybus/audio_gb.c
+++ b/drivers/staging/greybus/audio_gb.c
@@ -8,7 +8,13 @@
 #include <linux/greybus.h>
 #include "audio_codec.h"
 
-/* TODO: Split into separate calls */
+int fetch_gb_audio_data(struct gb_connection *connection,
+			int type, void *response, int response_size)
+{
+	return gb_operation_sync(connection, type, NULL, 0,
+				 response, response_size);
+}
+
 int gb_audio_gb_get_topology(struct gb_connection *connection,
 			     struct gb_audio_topology **topology)
 {
@@ -17,28 +23,23 @@ int gb_audio_gb_get_topology(struct gb_connection *connection,
 	u16 size;
 	int ret;
 
-	ret = gb_operation_sync(connection, GB_AUDIO_TYPE_GET_TOPOLOGY_SIZE,
-				NULL, 0, &size_resp, sizeof(size_resp));
+	ret = fetch_gb_audio_data(connection, GB_AUDIO_TYPE_GET_TOPOLOGY_SIZE,
+				  &size_resp, sizeof(size_resp));
 	if (ret)
 		return ret;
-
 	size = le16_to_cpu(size_resp.size);
 	if (size < sizeof(*topo))
 		return -ENODATA;
-
 	topo = kzalloc(size, GFP_KERNEL);
 	if (!topo)
 		return -ENOMEM;
-
-	ret = gb_operation_sync(connection, GB_AUDIO_TYPE_GET_TOPOLOGY, NULL, 0,
-				topo, size);
+	ret = fetch_gb_audio_data(connection, GB_AUDIO_TYPE_GET_TOPOLOGY,
+				  topo, size);
 	if (ret) {
 		kfree(topo);
 		return ret;
 	}
-
 	*topology = topo;
-
 	return 0;
 }
 EXPORT_SYMBOL_GPL(gb_audio_gb_get_topology);
-- 
2.25.1