diff --git a/components/bt/bluedroid/stack/include/hcimsgs.h b/components/bt/bluedroid/stack/include/hcimsgs.h
index d360a9a12..4e537bf13 100644
--- a/components/bt/bluedroid/stack/include/hcimsgs.h
+++ b/components/bt/bluedroid/stack/include/hcimsgs.h
@@ -275,7 +275,10 @@ BOOLEAN btsnd_hcic_hold_mode(UINT16 handle, UINT16 max_hold_period,
 #define HCI_HOLD_MODE_MIN_PER_OFF       4
 /* Hold Mode */
 
-/* Sniff Mode */
+/**
+ * Sniff Mode
+ * sniff_attempt should no more than 0xFF
+ */
 BOOLEAN btsnd_hcic_sniff_mode(UINT16 handle,
                               UINT16 max_sniff_period,
                               UINT16 min_sniff_period,
diff --git a/components/bt/lib b/components/bt/lib
index 84b35d5b6..8623625b6 160000
--- a/components/bt/lib
+++ b/components/bt/lib
@@ -1 +1 @@
-Subproject commit 84b35d5b6ba968d29e88df77d137916c48c4b6e1
+Subproject commit 8623625b6d3fe7ddc6820b49d3ff16fea1570ac8
diff --git a/components/esp32/ld/esp32.rom.ld b/components/esp32/ld/esp32.rom.ld
index 4be6b114a..72ecbfa63 100644
--- a/components/esp32/ld/esp32.rom.ld
+++ b/components/esp32/ld/esp32.rom.ld
@@ -197,6 +197,7 @@ PROVIDE ( ld_acl_br_sizes = 0x3ff98a2a );
 PROVIDE ( ld_acl_br_types = 0x3ff98a36 );
 PROVIDE ( ld_acl_edr_sizes = 0x3ff98a14 );
 PROVIDE ( ld_acl_edr_types = 0x3ff98a22 );
+PROVIDE ( ld_acl_sniff_frm_cbk = 0x4003482c );
 PROVIDE ( ld_env = 0x3ffb9510 );
 PROVIDE ( ld_pcm_settings_dft = 0x3ff98a0c );
 PROVIDE ( ld_sched_params = 0x3ffb96c0 );