qcacmn: Do not LRO aggregate if peer is not connected

We have race condition between lro flush of hif_napi_poll and MC thread
lro flush while flushing the ol_txrx_cached_bufq packets for peer. Avoid
the situation by simply marking the all the Rx packets as LRO ineligible
while enqueuing packets to ol_rx_cached_buf.

Change-Id: Ief0d7dd6c25cf45912820f0e237fd1179a57a5c7
CRs-Fixed: 2032674

qdf/linux/src/i_qdf_nbuf.h

@@ -137,6 +137,7 @@ struct qdf_nbuf_cb {
 		/* Note: MAX: 40 bytes */
 		struct {
 			uint32_t lro_eligible:1,
+				no_peer_lro_ineligible:1,
 				tcp_proto:1,
 				tcp_pure_ack:1,
 				ipv6_proto:1,
@@ -251,6 +252,8 @@ QDF_COMPILE_TIME_ASSERT(qdf_nbuf_cb_size,
 
 #define QDF_NBUF_CB_RX_LRO_ELIGIBLE(skb) \
 	(((struct qdf_nbuf_cb *)((skb)->cb))->u.rx.lro_eligible)
+#define QDF_NBUF_CB_RX_LRO_INELIGIBLE(skb) \
+	(((struct qdf_nbuf_cb *)((skb)->cb))->u.rx.no_peer_lro_ineligible)
 #define QDF_NBUF_CB_RX_LRO_DESC(skb) \
 	(((struct qdf_nbuf_cb *)((skb)->cb))->u.rx.lro_desc)
 #define QDF_NBUF_CB_RX_LRO_CTX(skb) \

qdf/linux/src/qdf_lro.c

@@ -328,6 +328,7 @@ bool qdf_lro_get_info(qdf_lro_ctx_t lro_ctx, qdf_nbuf_t nbuf,
 	int hw_lro_eligible =
 		 QDF_NBUF_CB_RX_LRO_ELIGIBLE(nbuf) &&
 		 (!QDF_NBUF_CB_RX_TCP_PURE_ACK(nbuf));
+	int rx_data_before_peer_rx = QDF_NBUF_CB_RX_LRO_INELIGIBLE(nbuf);
 
 	if (unlikely(!lro_ctx)) {
 		QDF_TRACE(QDF_MODULE_ID_QDF, QDF_TRACE_LEVEL_ERROR,
@@ -335,7 +336,7 @@ bool qdf_lro_get_info(qdf_lro_ctx_t lro_ctx, qdf_nbuf_t nbuf,
 		return false;
 	}
 
-	if (!hw_lro_eligible)
+	if (!hw_lro_eligible || rx_data_before_peer_rx)
 		return false;
 
 	iph = (struct iphdr *)info->iph;