Bluetooth: Controller: Do not disconnect all CIS on MIC failure

Fix implementation to not disconnect all CIS when one
connection has MIC failure.

Signed-off-by: Vinayak Kariappa Chettimada <[email protected]>

Author: cvinayak

subsys/bluetooth/controller/ll_sw/ull_conn_iso.c

@@ -349,11 +349,18 @@ void ull_conn_iso_done(struct node_rx_event_done *done)
 
 		if (cis->lll.active && cis->lll.handle != LLL_HANDLE_INVALID) {
 			/* CIS was setup and is now expected to be going */
-			if (done->extra.mic_state == LLL_CONN_MIC_FAIL) {
-				/* MIC failure - stop CIS and defer cleanup to after teardown. */
-				ull_conn_iso_cis_stop(cis, NULL, BT_HCI_ERR_TERM_DUE_TO_MIC_FAIL);
-			} else if (!(done->extra.trx_performed_bitmask &
-				     (1U << LL_CIS_IDX_FROM_HANDLE(cis->lll.handle)))) {
+			if (done->extra.trx_performed_bitmask &
+			    (1U << LL_CIS_IDX_FROM_HANDLE(cis->lll.handle))) {
+				if (done->extra.mic_state == LLL_CONN_MIC_FAIL) {
+					/* MIC failure - stop CIS and defer cleanup to after
+					 * teardown.
+					 */
+					ull_conn_iso_cis_stop(cis, NULL,
+							      BT_HCI_ERR_TERM_DUE_TO_MIC_FAIL);
+				} else {
+					cis->event_expire = 0U;
+				}
+			} else {
 				/* We did NOT have successful transaction on established CIS,
 				 * or CIS was not yet established, so handle timeout
 				 */
@@ -381,8 +388,6 @@ void ull_conn_iso_done(struct node_rx_event_done *done)
 							      BT_HCI_ERR_CONN_FAIL_TO_ESTAB);
 
 				}
-			} else {
-				cis->event_expire = 0U;
 			}
 		}
 	}