diff --git a/bluetooth/aidl/default/BluetoothHci.cpp b/bluetooth/aidl/default/BluetoothHci.cpp
index d4e4b34..940f2ad 100644
--- a/bluetooth/aidl/default/BluetoothHci.cpp
+++ b/bluetooth/aidl/default/BluetoothHci.cpp
@@ -176,7 +176,10 @@
   mFdWatcher.WatchFdForNonBlockingReads(mFd,
                                         [this](int) { mH4->OnDataReady(); });
 
-  send(PacketType::COMMAND, reset);
+  ndk::ScopedAStatus result = send(PacketType::COMMAND, reset);
+  if (!result.isOk()) {
+    ALOGE("Error sending reset command");
+  }
   auto status = resetFuture.wait_for(std::chrono::seconds(1));
   mFdWatcher.StopWatchingFileDescriptors();
   if (status == std::future_status::ready) {
@@ -303,30 +306,35 @@
 
 ndk::ScopedAStatus BluetoothHci::sendHciCommand(
     const std::vector<uint8_t>& packet) {
-  send(PacketType::COMMAND, packet);
-  return ndk::ScopedAStatus::ok();
+  return send(PacketType::COMMAND, packet);
 }
 
 ndk::ScopedAStatus BluetoothHci::sendAclData(
     const std::vector<uint8_t>& packet) {
-  send(PacketType::ACL_DATA, packet);
-  return ndk::ScopedAStatus::ok();
+  return send(PacketType::ACL_DATA, packet);
 }
 
 ndk::ScopedAStatus BluetoothHci::sendScoData(
     const std::vector<uint8_t>& packet) {
-  send(PacketType::SCO_DATA, packet);
-  return ndk::ScopedAStatus::ok();
+  return send(PacketType::SCO_DATA, packet);
 }
 
 ndk::ScopedAStatus BluetoothHci::sendIsoData(
     const std::vector<uint8_t>& packet) {
-  send(PacketType::ISO_DATA, packet);
-  return ndk::ScopedAStatus::ok();
+  return send(PacketType::ISO_DATA, packet);
 }
 
-void BluetoothHci::send(PacketType type, const std::vector<uint8_t>& v) {
+ndk::ScopedAStatus BluetoothHci::send(PacketType type,
+    const std::vector<uint8_t>& v) {
+  if (mH4 == nullptr) {
+    return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
+  }
+  if (v.empty()) {
+    ALOGE("Packet is empty, no data was found to be sent");
+    return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
+  }
   mH4->Send(type, v);
+  return ndk::ScopedAStatus::ok();
 }
 
 }  // namespace aidl::android::hardware::bluetooth::impl
diff --git a/bluetooth/aidl/default/BluetoothHci.h b/bluetooth/aidl/default/BluetoothHci.h
index 85aafc8..477cc5c 100644
--- a/bluetooth/aidl/default/BluetoothHci.h
+++ b/bluetooth/aidl/default/BluetoothHci.h
@@ -66,8 +66,9 @@
   ::android::hardware::bluetooth::async::AsyncFdWatcher mFdWatcher;
 
   int getFdFromDevPath();
-  void send(::android::hardware::bluetooth::hci::PacketType type,
-            const std::vector<uint8_t>& packet);
+  [[nodiscard]] ndk::ScopedAStatus send(
+      ::android::hardware::bluetooth::hci::PacketType type,
+      const std::vector<uint8_t>& packet);
   std::unique_ptr<NetBluetoothMgmt> management_{};
 
   // Send a reset command and discard all packets until a reset is received.
diff --git a/bluetooth/hci/h4_protocol.cc b/bluetooth/hci/h4_protocol.cc
index 51a624f..5f6d86e 100644
--- a/bluetooth/hci/h4_protocol.cc
+++ b/bluetooth/hci/h4_protocol.cc
@@ -105,15 +105,12 @@
       buffer_offset += 1;
     } else {
       bool packet_ready = hci_packetizer_.OnDataReady(
-          hci_packet_type_, input_buffer, buffer_offset);
+          hci_packet_type_, input_buffer, &buffer_offset);
       if (packet_ready) {
-        // Call packet callback and move offset.
-        buffer_offset += OnPacketReady(hci_packetizer_.GetPacket());
+        // Call packet callback.
+        OnPacketReady(hci_packetizer_.GetPacket());
         // Get ready for the next type byte.
         hci_packet_type_ = PacketType::UNKNOWN;
-      } else {
-        // The data was consumed, but there wasn't a packet.
-        buffer_offset = input_buffer.size();
       }
     }
   }
diff --git a/bluetooth/hci/hci_packetizer.cc b/bluetooth/hci/hci_packetizer.cc
index 5b6c443..4135920 100644
--- a/bluetooth/hci/hci_packetizer.cc
+++ b/bluetooth/hci/hci_packetizer.cc
@@ -51,9 +51,10 @@
 
 bool HciPacketizer::OnDataReady(PacketType packet_type,
                                 const std::vector<uint8_t>& buffer,
-                                size_t offset) {
+                                size_t* offset) {
   bool packet_completed = false;
-  size_t bytes_available = buffer.size() - offset;
+  size_t bytes_available = buffer.size() - *offset;
+
   switch (state_) {
     case HCI_HEADER: {
       size_t header_size =
@@ -62,18 +63,20 @@
         bytes_remaining_ = header_size;
         packet_.clear();
       }
+
       size_t bytes_to_copy = std::min(bytes_remaining_, bytes_available);
-      packet_.insert(packet_.end(), buffer.begin() + offset,
-                     buffer.begin() + offset + bytes_to_copy);
+      packet_.insert(packet_.end(), buffer.begin() + *offset,
+                     buffer.begin() + *offset + bytes_to_copy);
       bytes_remaining_ -= bytes_to_copy;
       bytes_available -= bytes_to_copy;
+      *offset += bytes_to_copy;
+
       if (bytes_remaining_ == 0) {
         bytes_remaining_ = HciGetPacketLengthForType(packet_type, packet_);
         if (bytes_remaining_ > 0) {
           state_ = HCI_PAYLOAD;
           if (bytes_available > 0) {
-            packet_completed =
-                OnDataReady(packet_type, buffer, offset + bytes_to_copy);
+            packet_completed = OnDataReady(packet_type, buffer, offset);
           }
         } else {
           packet_completed = true;
@@ -84,9 +87,10 @@
 
     case HCI_PAYLOAD: {
       size_t bytes_to_copy = std::min(bytes_remaining_, bytes_available);
-      packet_.insert(packet_.end(), buffer.begin() + offset,
-                     buffer.begin() + offset + bytes_to_copy);
+      packet_.insert(packet_.end(), buffer.begin() + *offset,
+                     buffer.begin() + *offset + bytes_to_copy);
       bytes_remaining_ -= bytes_to_copy;
+      *offset += bytes_to_copy;
       if (bytes_remaining_ == 0) {
         state_ = HCI_HEADER;
         packet_completed = true;
@@ -94,6 +98,7 @@
       break;
     }
   }
+
   return packet_completed;
 }
 
diff --git a/bluetooth/hci/hci_packetizer.h b/bluetooth/hci/hci_packetizer.h
index ba3e841..0d9319f 100644
--- a/bluetooth/hci/hci_packetizer.h
+++ b/bluetooth/hci/hci_packetizer.h
@@ -28,7 +28,7 @@
  public:
   HciPacketizer() = default;
   bool OnDataReady(PacketType packet_type, const std::vector<uint8_t>& data,
-                   size_t offset);
+                   size_t* offset);
   const std::vector<uint8_t>& GetPacket() const;
 
  protected:
diff --git a/bluetooth/hci/test/h4_protocol_unittest.cc b/bluetooth/hci/test/h4_protocol_unittest.cc
index d3fab61..f0c49b5 100644
--- a/bluetooth/hci/test/h4_protocol_unittest.cc
+++ b/bluetooth/hci/test/h4_protocol_unittest.cc
@@ -31,7 +31,6 @@
 #include <vector>
 
 #include "async_fd_watcher.h"
-#include "log/log.h"
 
 using android::hardware::bluetooth::async::AsyncFdWatcher;
 using namespace android::hardware::bluetooth::hci;
@@ -49,6 +48,7 @@
 static char event_data[100] = "The edges of a surface are lines.";
 static char iso_data[100] =
     "A plane angle is the inclination to one another of two lines in a ...";
+static char short_payload[10] = "12345";
 
 // 5 seconds.  Just don't hang.
 static constexpr size_t kTimeoutMs = 5000;
@@ -225,6 +225,49 @@
     CallDataReady();
   }
 
+  void WriteAndExpectManyAclDataPacketsDifferentOffsetsShort() {
+    std::promise<void> last_packet_promise;
+    size_t kNumPackets = 30;
+    // h4 type[1] + handle[2] + size[2]
+    char preamble[5] = {static_cast<uint8_t>(PacketType::ACL_DATA), 19, 92, 0,
+                        0};
+    int length = strlen(short_payload);
+    preamble[3] = length & 0xFF;
+    preamble[4] = 0;
+
+    EXPECT_CALL(acl_cb_, Call(PacketMatches(preamble + 1, kAclHeaderSize,
+                                            short_payload)))
+        .Times(kNumPackets);
+    ExpectInboundEvent(event_data, &last_packet_promise);
+
+    char all_packets[kNumPackets * 10];
+    size_t total_bytes = 0;
+
+    for (size_t packet = 0; packet < kNumPackets; packet++) {
+      for (size_t i = 0; i < sizeof(preamble); i++) {
+        all_packets[total_bytes++] = preamble[i];
+      }
+      for (size_t i = 0; i < length; i++) {
+        all_packets[total_bytes++] = short_payload[i];
+      }
+    }
+
+    size_t written_bytes = 0;
+    size_t partial_size = 1;
+    while (written_bytes < total_bytes) {
+      size_t to_write = std::min(partial_size, total_bytes - written_bytes);
+      TEMP_FAILURE_RETRY(
+          write(chip_uart_fd_, all_packets + written_bytes, to_write));
+      written_bytes += to_write;
+      CallDataReady();
+      partial_size++;
+      partial_size = partial_size % 5 + 1;
+    }
+    WriteInboundEvent(event_data);
+    CallDataReady();
+    WaitForTimeout(&last_packet_promise);
+  }
+
   testing::MockFunction<void(const std::vector<uint8_t>&)> cmd_cb_;
   testing::MockFunction<void(const std::vector<uint8_t>&)> event_cb_;
   testing::MockFunction<void(const std::vector<uint8_t>&)> acl_cb_;
@@ -276,6 +319,10 @@
   WriteAndExpectManyInboundAclDataPackets(sco_data);
 }
 
+TEST_F(H4ProtocolTest, TestMultipleWritesPacketsShortWrites) {
+  WriteAndExpectManyAclDataPacketsDifferentOffsetsShort();
+}
+
 TEST_F(H4ProtocolTest, TestDisconnect) {
   EXPECT_CALL(disconnect_cb_, Call());
   close(chip_uart_fd_);
@@ -332,10 +379,8 @@
 
   void TearDown() override { fd_watcher_.StopWatchingFileDescriptors(); }
 
-  void CallDataReady() override {
-    // The Async test can't call data ready.
-    FAIL();
-  }
+  // Calling CallDataReady() has no effect in the AsyncTest
+  void CallDataReady() override {}
 
   void SendAndReadUartOutbound(PacketType type, char* data) {
     ALOGD("%s sending", __func__);
@@ -434,6 +479,10 @@
   WriteAndExpectManyInboundAclDataPackets(sco_data);
 }
 
+TEST_F(H4ProtocolAsyncTest, TestMultipleWritesPacketsShortWrites) {
+  WriteAndExpectManyAclDataPacketsDifferentOffsetsShort();
+}
+
 TEST_F(H4ProtocolAsyncTest, TestDisconnect) {
   std::promise<void> promise;
   EXPECT_CALL(disconnect_cb_, Call()).WillOnce(Notify(&promise));
diff --git a/compatibility_matrices/Android.bp b/compatibility_matrices/Android.bp
index 93b5380..b3ca293 100644
--- a/compatibility_matrices/Android.bp
+++ b/compatibility_matrices/Android.bp
@@ -82,3 +82,15 @@
         "kernel_config_u_6.1",
     ],
 }
+
+vintf_compatibility_matrix {
+    name: "framework_compatibility_matrix.9.xml",
+    stem: "compatibility_matrix.9.xml",
+    srcs: [
+        "compatibility_matrix.9.xml",
+    ],
+    kernel_configs: [
+        "kernel_config_v_5.15",
+        "kernel_config_v_6.1",
+    ],
+}
diff --git a/compatibility_matrices/Android.mk b/compatibility_matrices/Android.mk
index 6e4c419..a82a421 100644
--- a/compatibility_matrices/Android.mk
+++ b/compatibility_matrices/Android.mk
@@ -103,6 +103,7 @@
     framework_compatibility_matrix.6.xml \
     framework_compatibility_matrix.7.xml \
     framework_compatibility_matrix.8.xml \
+    framework_compatibility_matrix.9.xml \
     framework_compatibility_matrix.device.xml \
 
 my_framework_matrix_deps += \
diff --git a/compatibility_matrices/compatibility_matrix.9.xml b/compatibility_matrices/compatibility_matrix.9.xml
index 188746d..f9b795e 100644
--- a/compatibility_matrices/compatibility_matrix.9.xml
+++ b/compatibility_matrices/compatibility_matrix.9.xml
@@ -1,4 +1,3 @@
-<!-- WARNING: This file is unused in the Android 14 branch. -->
 <compatibility-matrix version="1.0" type="framework" level="9">
     <hal format="hidl" optional="true">
         <name>android.hardware.audio</name>
@@ -493,16 +492,6 @@
         </interface>
     </hal>
     <hal format="aidl" optional="true">
-        <name>android.hardware.radio.satellite</name>
-        <version>1</version>
-        <interface>
-            <name>IRadioSatellite</name>
-            <instance>slot1</instance>
-            <instance>slot2</instance>
-            <instance>slot3</instance>
-        </interface>
-    </hal>
-    <hal format="aidl" optional="true">
         <name>android.hardware.radio.ims.media</name>
         <version>1</version>
         <interface>
@@ -510,14 +499,6 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="true">
-        <name>android.hardware.renderscript</name>
-        <version>1.0</version>
-        <interface>
-            <name>IDevice</name>
-            <instance>default</instance>
-        </interface>
-    </hal>
     <hal format="aidl" optional="true">
         <name>android.hardware.rebootescrow</name>
         <version>1</version>
diff --git a/radio/aidl/vts/radio_aidl_hal_utils.cpp b/radio/aidl/vts/radio_aidl_hal_utils.cpp
index 6ed8e7d..f18da55 100644
--- a/radio/aidl/vts/radio_aidl_hal_utils.cpp
+++ b/radio/aidl/vts/radio_aidl_hal_utils.cpp
@@ -85,7 +85,7 @@
     // Do not use checkSubstringInCommandOutput("getprop persist.radio.multisim.config", "")
     // until b/148904287 is fixed. We need exact matching instead of partial matching. (i.e.
     // by definition the empty string "" is a substring of any string).
-    return !isDsDsEnabled() && !isTsTsEnabled();
+    return !isDsDsEnabled() && !isTsTsEnabled() && !isDsDaEnabled();
 }
 
 bool isDsDsEnabled() {
@@ -125,8 +125,8 @@
             ALOGI("%s instance is not valid for SSSS device.", serviceName.c_str());
             return false;
         }
-    } else if (isDsDsEnabled()) {
-        // Device is configured as DSDS.
+    } else if (isDsDsEnabled() || isDsDaEnabled()) {
+        // Device is configured as DSDS or DSDA.
         if (!stringEndsWith(serviceName, RADIO_SERVICE_SLOT1_NAME) &&
             !stringEndsWith(serviceName, RADIO_SERVICE_SLOT2_NAME)) {
             ALOGI("%s instance is not valid for DSDS device.", serviceName.c_str());