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qcacmn: Do not LRO aggregate if peer is not connected

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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
This commit is contained in:
Manjunathappa Prakash 2017-04-12 18:32:39 -07:00 • committed by snandini
commit 8804f978eb
2 changed files with 5 additions and 1 deletions
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3
qdf/linux/src/i_qdf_nbuf.h
View file

@ -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) \

3
qdf/linux/src/qdf_lro.c
View file

@ -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;