diff --git a/components/bt/include/esp_bt.h b/components/bt/include/esp_bt.h
index b1dbc6467..b098c133d 100644
--- a/components/bt/include/esp_bt.h
+++ b/components/bt/include/esp_bt.h
@@ -326,8 +326,12 @@ bool esp_vhci_host_check_send_available(void);
 
 /** @brief esp_vhci_host_send_packet
  * host send packet to controller
+ *
+ * Should not call this function from within a critical section
+ * or when the scheduler is suspended.
+ *
  * @param data the packet point
- *,@param len the packet length
+ * @param len the packet length
  */
 void esp_vhci_host_send_packet(uint8_t *data, uint16_t len);
 
@@ -453,11 +457,11 @@ void esp_bt_controller_wakeup_request(void);
 
 /**
  * @brief Manually clear scan duplicate list
- * 
+ *
  * Note that scan duplicate list will be automatically cleared when the maximum amount of device in the filter is reached
  * the amount of device in the filter can be configured in menuconfig.
- * 
- * 
+ *
+ *
  * @return
  *                  - ESP_OK : success
  *                  - other  : failed
diff --git a/components/bt/lib b/components/bt/lib
index f71810666..1c4b96d23 160000
--- a/components/bt/lib
+++ b/components/bt/lib
@@ -1 +1 @@
-Subproject commit f71810666b7f4ef27eb07ee111f13f8bf98ac3ed
+Subproject commit 1c4b96d237abe47d25b5b1a807b1f3b7fed60f93
diff --git a/components/esp32/ld/esp32.rom.ld b/components/esp32/ld/esp32.rom.ld
index 011664758..7b3dc08a4 100644
--- a/components/esp32/ld/esp32.rom.ld
+++ b/components/esp32/ld/esp32.rom.ld
@@ -88,6 +88,8 @@ PROVIDE ( esp_crc8 = 0x4005d144 );
 PROVIDE ( _etext = 0x4000d66c );
 PROVIDE ( ets_readySet_ = 0x3ffe01f0 );
 PROVIDE ( ets_startup_callback = 0x3ffe0404 );
+PROVIDE ( rwip_coex_cfg = 0x3ff9914c );
+PROVIDE ( rwip_priority = 0x3ff99159 );
 PROVIDE ( exc_cause_table = 0x3ff991d0 );
 PROVIDE ( _exit_r = 0x4000bd28 );
 PROVIDE ( free = 0x4000beb8 );
@@ -675,6 +677,9 @@ PROVIDE ( ld_sco_modify = 0x40031778 );
 PROVIDE ( lm_cmd_cmp_send = 0x40051838 );
 PROVIDE ( ld_sco_frm_cbk = 0x400349dc );
 PROVIDE ( ld_acl_sniff_frm_cbk = 0x4003482c );
+PROVIDE ( ld_inq_end = 0x4003ab48 );
+PROVIDE ( ld_inq_sched = 0x4003aba4 );
+PROVIDE ( ld_inq_frm_cbk = 0x4003ae4c );
 PROVIDE ( r_ld_acl_active_hop_types_get = 0x40036e10 );
 PROVIDE ( r_ld_acl_afh_confirm = 0x40036d40 );
 PROVIDE ( r_ld_acl_afh_prepare = 0x40036c84 );