diff --git a/bluetooth/1.0/default/bluetooth_address.cc b/bluetooth/1.0/default/bluetooth_address.cc
index 656d78d..65dc6a6 100644
--- a/bluetooth/1.0/default/bluetooth_address.cc
+++ b/bluetooth/1.0/default/bluetooth_address.cc
@@ -16,8 +16,8 @@
 
 #include "bluetooth_address.h"
 
-#include <android-base/logging.h>
 #include <cutils/properties.h>
+#include <errno.h>
 #include <fcntl.h>
 #include <utils/Log.h>
 
@@ -54,19 +54,25 @@
 
     addr_fd = open(property, O_RDONLY);
     if (addr_fd != -1) {
-      int bytes_read = read(addr_fd, property, kStringLength);
-      CHECK(bytes_read == kStringLength);
+      char address[kStringLength + 1] = {0};
+      int bytes_read = read(addr_fd, address, kStringLength);
+      if (bytes_read == -1) {
+        ALOGE("%s: Error reading address from %s: %s", __func__, property,
+              strerror(errno));
+      }
       close(addr_fd);
 
       // Null terminate the string.
-      property[kStringLength] = '\0';
+      address[kStringLength] = '\0';
 
       // If the address is not all zeros, then use it.
       const uint8_t zero_bdaddr[kBytes] = {0, 0, 0, 0, 0, 0};
-      if ((string_to_bytes(property, local_addr)) &&
+      if ((string_to_bytes(address, local_addr)) &&
           (memcmp(local_addr, zero_bdaddr, kBytes) != 0)) {
         valid_bda = true;
-        ALOGD("%s: Got Factory BDA %s", __func__, property);
+        ALOGD("%s: Got Factory BDA %s", __func__, address);
+      } else {
+        ALOGE("%s: Got Invalid BDA '%s' from %s", __func__, address, property);
       }
     }
   }
diff --git a/bluetooth/1.0/default/h4_protocol.cc b/bluetooth/1.0/default/h4_protocol.cc
index 2df2b3b..2008b00 100644
--- a/bluetooth/1.0/default/h4_protocol.cc
+++ b/bluetooth/1.0/default/h4_protocol.cc
@@ -17,7 +17,7 @@
 #include "h4_protocol.h"
 
 #define LOG_TAG "android.hardware.bluetooth-hci-h4"
-#include <android-base/logging.h>
+
 #include <errno.h>
 #include <fcntl.h>
 #include <log/log.h>
@@ -38,9 +38,9 @@
 
   if (ret == -1) {
     ALOGE("%s error writing to UART (%s)", __func__, strerror(errno));
-  } else if (ret == 0) {
-    // Nothing written :(
-    ALOGE("%s zero bytes written - something went wrong...", __func__);
+  } else if (ret < static_cast<ssize_t>(length + 1)) {
+    ALOGE("%s: %d / %d bytes written - something went wrong...", __func__,
+          static_cast<int>(ret), static_cast<int>(length + 1));
   }
   return ret;
 }
@@ -56,10 +56,9 @@
     case HCI_PACKET_TYPE_SCO_DATA:
       sco_cb_(hci_packetizer_.GetPacket());
       break;
-    default: {
-      bool bad_packet_type = true;
-      CHECK(!bad_packet_type);
-    }
+    default:
+      LOG_ALWAYS_FATAL("%s: Unimplemented packet type %d", __func__,
+                       static_cast<int>(hci_packet_type_));
   }
   // Get ready for the next type byte.
   hci_packet_type_ = HCI_PACKET_TYPE_UNKNOWN;
@@ -68,8 +67,19 @@
 void H4Protocol::OnDataReady(int fd) {
   if (hci_packet_type_ == HCI_PACKET_TYPE_UNKNOWN) {
     uint8_t buffer[1] = {0};
-    size_t bytes_read = TEMP_FAILURE_RETRY(read(fd, buffer, 1));
-    CHECK(bytes_read == 1);
+    ssize_t bytes_read = TEMP_FAILURE_RETRY(read(fd, buffer, 1));
+    if (bytes_read != 1) {
+      if (bytes_read == 0) {
+        LOG_ALWAYS_FATAL("%s: Unexpected EOF reading the packet type!",
+                         __func__);
+      } else if (bytes_read < 0) {
+        LOG_ALWAYS_FATAL("%s: Read packet type error: %s", __func__,
+                         strerror(errno));
+      } else {
+        LOG_ALWAYS_FATAL("%s: More bytes read than expected (%u)!", __func__,
+                         static_cast<unsigned int>(bytes_read));
+      }
+    }
     hci_packet_type_ = static_cast<HciPacketType>(buffer[0]);
   } else {
     hci_packetizer_.OnDataReady(fd, hci_packet_type_);
diff --git a/bluetooth/1.0/default/hci_packetizer.cc b/bluetooth/1.0/default/hci_packetizer.cc
index 9549858..2da1254 100644
--- a/bluetooth/1.0/default/hci_packetizer.cc
+++ b/bluetooth/1.0/default/hci_packetizer.cc
@@ -17,11 +17,11 @@
 #include "hci_packetizer.h"
 
 #define LOG_TAG "android.hardware.bluetooth.hci_packetizer"
-#include <android-base/logging.h>
-#include <utils/Log.h>
 
 #include <dlfcn.h>
+#include <errno.h>
 #include <fcntl.h>
+#include <utils/Log.h>
 
 namespace {
 
@@ -45,15 +45,22 @@
 namespace bluetooth {
 namespace hci {
 
-const hidl_vec<uint8_t>& HciPacketizer::GetPacket() const { return packet_; }
+const hidl_vec<uint8_t>& HciPacketizer::GetPacket() const {
+  return packet_;
+}
 
 void HciPacketizer::OnDataReady(int fd, HciPacketType packet_type) {
   switch (state_) {
     case HCI_PREAMBLE: {
-      size_t bytes_read = TEMP_FAILURE_RETRY(
+      ssize_t bytes_read = TEMP_FAILURE_RETRY(
           read(fd, preamble_ + bytes_read_,
                preamble_size_for_type[packet_type] - bytes_read_));
-      CHECK(bytes_read > 0);
+      if (bytes_read <= 0) {
+        LOG_ALWAYS_FATAL_IF((bytes_read == 0),
+                            "%s: Unexpected EOF reading the header!", __func__);
+        LOG_ALWAYS_FATAL("%s: Read header error: %s", __func__,
+                         strerror(errno));
+      }
       bytes_read_ += bytes_read;
       if (bytes_read_ == preamble_size_for_type[packet_type]) {
         size_t packet_length =
@@ -68,11 +75,17 @@
     }
 
     case HCI_PAYLOAD: {
-      size_t bytes_read = TEMP_FAILURE_RETRY(read(
+      ssize_t bytes_read = TEMP_FAILURE_RETRY(read(
           fd,
           packet_.data() + preamble_size_for_type[packet_type] + bytes_read_,
           bytes_remaining_));
-      CHECK(bytes_read > 0);
+      if (bytes_read <= 0) {
+        LOG_ALWAYS_FATAL_IF((bytes_read == 0),
+                            "%s: Unexpected EOF reading the payload!",
+                            __func__);
+        LOG_ALWAYS_FATAL("%s: Read payload error: %s", __func__,
+                         strerror(errno));
+      }
       bytes_remaining_ -= bytes_read;
       bytes_read_ += bytes_read;
       if (bytes_remaining_ == 0) {
diff --git a/bluetooth/1.0/default/mct_protocol.cc b/bluetooth/1.0/default/mct_protocol.cc
index 813cebd..2a59187 100644
--- a/bluetooth/1.0/default/mct_protocol.cc
+++ b/bluetooth/1.0/default/mct_protocol.cc
@@ -19,7 +19,6 @@
 #include <assert.h>
 
 #define LOG_TAG "android.hardware.bluetooth-hci-mct"
-#include <android-base/logging.h>
 #include <utils/Log.h>
 
 #include <fcntl.h>
@@ -45,7 +44,7 @@
     return WriteSafely(uart_fds_[CH_CMD], data, length);
   if (type == HCI_PACKET_TYPE_ACL_DATA)
     return WriteSafely(uart_fds_[CH_ACL_OUT], data, length);
-  CHECK(type == HCI_PACKET_TYPE_COMMAND || type == HCI_PACKET_TYPE_ACL_DATA);
+  LOG_ALWAYS_FATAL("%s: Unimplemented packet type = %d", __func__, type);
   return 0;
 }
 
diff --git a/bluetooth/1.0/default/test/bluetooth_address_test.cc b/bluetooth/1.0/default/test/bluetooth_address_test.cc
index adcd9c1..e60729e 100644
--- a/bluetooth/1.0/default/test/bluetooth_address_test.cc
+++ b/bluetooth/1.0/default/test/bluetooth_address_test.cc
@@ -15,6 +15,7 @@
 //
 
 #include <cutils/properties.h>
+#include <errno.h>
 #include <fcntl.h>
 #include <gtest/gtest.h>
 
diff --git a/bluetooth/1.0/default/vendor_interface.cc b/bluetooth/1.0/default/vendor_interface.cc
index a291e14..ffc283e 100644
--- a/bluetooth/1.0/default/vendor_interface.cc
+++ b/bluetooth/1.0/default/vendor_interface.cc
@@ -17,7 +17,6 @@
 #include "vendor_interface.h"
 
 #define LOG_TAG "android.hardware.bluetooth@1.0-impl"
-#include <android-base/logging.h>
 #include <cutils/properties.h>
 #include <utils/Log.h>
 
@@ -163,14 +162,16 @@
     InitializeCompleteCallback initialize_complete_cb,
     PacketReadCallback event_cb, PacketReadCallback acl_cb,
     PacketReadCallback sco_cb) {
-  CHECK(!g_vendor_interface);
+  LOG_ALWAYS_FATAL_IF(g_vendor_interface, "%s: No previous Shutdown()?",
+                      __func__);
   g_vendor_interface = new VendorInterface();
   return g_vendor_interface->Open(initialize_complete_cb, event_cb, acl_cb,
                                   sco_cb);
 }
 
 void VendorInterface::Shutdown() {
-  CHECK(g_vendor_interface);
+  LOG_ALWAYS_FATAL_IF(!g_vendor_interface, "%s: No Vendor interface!",
+                      __func__);
   g_vendor_interface->Close();
   delete g_vendor_interface;
   g_vendor_interface = nullptr;
@@ -204,7 +205,9 @@
   // Get the local BD address
 
   uint8_t local_bda[BluetoothAddress::kBytes];
-  CHECK(BluetoothAddress::get_local_address(local_bda));
+  if (!BluetoothAddress::get_local_address(local_bda)) {
+    LOG_ALWAYS_FATAL("%s: No Bluetooth Address!", __func__);
+  }
   int status = lib_interface_->init(&lib_callbacks, (unsigned char*)local_bda);
   if (status) {
     ALOGE("%s unable to initialize vendor library: %d", __func__, status);