WifiLegacyHal: Add missing ring buffer callback dereg

Still figuring out how to send this data over the HIDL callback. Adding
this missing wrapper in legacy hal for now.

Bug:33638159
Test: Compiles
Change-Id: Ifce06a796d54e10c582b9896425899a45162a45f

2 files changed, 14 insertions, 1 deletions

diff --git a/wifi/1.0/default/wifi_legacy_hal.cpp b/wifi/1.0/default/wifi_legacy_hal.cpp
index 678ebb1a31..d65052e639 100644
--- a/wifi/1.0/default/wifi_legacy_hal.cpp
+++ b/wifi/1.0/default/wifi_legacy_hal.cpp
@@ -741,8 +741,20 @@ wifi_error WifiLegacyHal::registerRingBufferCallbackHandler(
       on_user_data_callback(ring_name, buffer_vector, *status);
     }
   };
-  return global_func_table_.wifi_set_log_handler(
+  wifi_error status = global_func_table_.wifi_set_log_handler(
       0, wlan_interface_handle_, {onRingBufferData});
+  if (status != WIFI_SUCCESS) {
+    on_ring_buffer_data_internal_callback = nullptr;
+  }
+  return status;
+}
+
+wifi_error WifiLegacyHal::deregisterRingBufferCallbackHandler() {
+  if (!on_ring_buffer_data_internal_callback) {
+    return WIFI_ERROR_NOT_AVAILABLE;
+  }
+  on_ring_buffer_data_internal_callback = nullptr;
+  return global_func_table_.wifi_reset_log_handler(0, wlan_interface_handle_);
 }
 
 std::pair<wifi_error, std::vector<wifi_ring_buffer_status>>
diff --git a/wifi/1.0/default/wifi_legacy_hal.h b/wifi/1.0/default/wifi_legacy_hal.h
index c846fc8da1..b5853147ab 100644
--- a/wifi/1.0/default/wifi_legacy_hal.h
+++ b/wifi/1.0/default/wifi_legacy_hal.h
@@ -192,6 +192,7 @@ class WifiLegacyHal {
   std::pair<wifi_error, WakeReasonStats> getWakeReasonStats();
   wifi_error registerRingBufferCallbackHandler(
       const on_ring_buffer_data_callback& on_data_callback);
+  wifi_error deregisterRingBufferCallbackHandler();
   std::pair<wifi_error, std::vector<wifi_ring_buffer_status>>
   getRingBuffersStatus();
   wifi_error startRingBufferLogging(const std::string& ring_name,