Clear BLE block from device records at unpair
Use Case:
Pair and unpair LE remote device repeatedly. The repair
intermittently fails with the error "DHKey Check Failure"
Failure:
Pairing failure is observed when pairing is performed
after unpairing, without performing a BT reset.
Further analysis of the SMP logs indicate that DUT uses the
static address of the remote device for calculation of the
MacKey value. At the time of pairing, the remote RPA should
be used (and the static address has not yet been distributed either).
The problem is caused by the previous dev record which is left in
the stack, and at the time of repair, stack picks the old device
record and reuses it.
Fix:
This change removes the entire BLE block from the device record,
after the unpairing is performed, so that a new device record
is allocated, after the repairing is done.
Bug: 27852645
Change-Id: I8d605d1bb3b1c32061a8d8a7a7fe0fe200030abc
diff --git a/stack/btm/btm_dev.c b/stack/btm/btm_dev.c
index df58304..c5718c6 100644
--- a/stack/btm/btm_dev.c
+++ b/stack/btm/btm_dev.c
@@ -301,6 +301,8 @@
#if BLE_INCLUDED == TRUE
/* Clear out any saved BLE keys */
btm_sec_clear_ble_keys (p_dev_rec);
+ /* clear the ble block */
+ memset(&p_dev_rec->ble, 0, sizeof(tBTM_SEC_BLE));
#endif
