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Bluetooth: controller: legacy: Fix DLE duplicate requests

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Fix implementation to handle back-to-back and duplicate
LENGTH_REQ PDU reception.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
This commit is contained in:
Vinayak Kariappa Chettimada 2020-03-24 12:53:40 +05:30 • committed by Carles Cufí
commit 79942b47cc
1 changed files with 15 additions and 3 deletions
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18
subsys/bluetooth/controller/ll_sw/ctrl.c
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@ -2692,9 +2692,21 @@ static inline u8_t isr_rx_conn_pkt_ctrl_dle(struct pdu_data *pdu_data_rx,
*rx_enqueue = 1U;
}
} else {
/* Drop response with no Local initiated request. */
LL_ASSERT(pdu_data_rx->llctrl.opcode ==
PDU_DATA_LLCTRL_TYPE_LENGTH_RSP);
/* Drop response with no Local initiated request and duplicate
* requests.
*/
if (pdu_data_rx->llctrl.opcode !=
PDU_DATA_LLCTRL_TYPE_LENGTH_RSP) {
mem_release(node_tx, &_radio.pkt_tx_ctrl_free);
/* Defer new request if previous in resize state */
if (_radio.conn_curr->llcp_length.state ==
LLCP_LENGTH_STATE_RESIZE) {
return 1U;
}
}
return 0;
}
send_length_resp: