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Bluetooth: Controller: Flush pending Tx PDUs before PHY update

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Flush any pending Tx PDUs in the lower link layer before
enqueueing PHY_UPDATE_IND PDU with instant to ensure the
PDU is transmitted before the instant occurs.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
This commit is contained in:
Vinayak Kariappa Chettimada 2021-07-09 16:05:39 +05:30 • committed by Carles Cufí
commit 97adf875b8
1 changed files with 11 additions and 0 deletions
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11
subsys/bluetooth/controller/ll_sw/ull_conn.c
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@ -4029,6 +4029,17 @@ static inline void event_phy_upd_ind_prep(struct ll_conn *conn,
struct node_rx_pdu *rx;
struct node_tx *tx;
/* Delay until all pending Tx in LLL is acknowledged,
* conn->llcp_phy.pause_tx is true, new Tx PDUs will not be
* enqueued until we proceed to initiate PHY update.
* This is required to ensure PDU with instant can be
* transmitted before instant expires.
*/
if (memq_peek(conn->lll.memq_tx.head, conn->lll.memq_tx.tail,
NULL)) {
return;
}
#if defined(CONFIG_BT_CTLR_DATA_LENGTH)
rx = ll_pdu_rx_alloc_peek(2);
#else /* !CONFIG_BT_CTLR_DATA_LENGTH */