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qcacld-3.0: Do netif_rx_ni() for frames received before peer assoc

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While processing of frames received before peer is registered in process
context, tcp_v4_rcv() is called which takes a spinlock and in between the
processing before spinlock can be released, it is getting preempted by
hif_napi_poll() as it gets executed in softirq context. It tries to take
the same spinlock in tcp_v4_rcv() resulting in deadlock.
Do netif_rx_ni() for frames received before peer is registered.

Change-Id: I6228984f209bb9312ed9d8f3937d6036918ff750
CRs-Fixed: 2034244
This commit is contained in:
Himanshu Agarwal 2017-07-31 11:38:14 +05:30 • committed by snandini
commit dd2196a8f5
3 changed files with 5 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

2
core/dp/txrx/ol_txrx.c
View file

@ -4647,7 +4647,7 @@ static inline int ol_txrx_drop_nbuf_list(qdf_nbuf_t buf_list)
buf = buf_list;
while (buf) {
QDF_NBUF_CB_RX_LRO_INELIGIBLE(buf) = 1;
QDF_NBUF_CB_RX_PEER_CACHED_FRM(buf) = 1;
next_buf = qdf_nbuf_queue_next(buf);
if (pdev)
TXRX_STATS_MSDU_INCR(pdev,

3
core/hdd/src/wlan_hdd_lro.c
View file

@ -142,7 +142,8 @@ enum hdd_lro_rx_status hdd_lro_rx(hdd_context_t *hdd_ctx,
enum hdd_lro_rx_status status = HDD_LRO_NO_RX;
if ((adapter->dev->features & NETIF_F_LRO) &&
QDF_NBUF_CB_RX_TCP_PROTO(skb)) {
QDF_NBUF_CB_RX_TCP_PROTO(skb) &&
!QDF_NBUF_CB_RX_PEER_CACHED_FRM(skb)) {
struct qdf_lro_info info;
struct net_lro_desc *lro_desc = NULL;
struct hif_opaque_softc *hif_hdl =

3
core/hdd/src/wlan_hdd_tx_rx.c
View file

@ -1258,7 +1258,8 @@ QDF_STATUS hdd_rx_packet_cbk(void *context, qdf_nbuf_t rxBuf)
if (HDD_LRO_NO_RX ==
hdd_lro_rx(pHddCtx, pAdapter, skb)) {
if (hdd_napi_enabled(HDD_NAPI_ANY) &&
!pHddCtx->enableRxThread)
!pHddCtx->enableRxThread &&
!QDF_NBUF_CB_RX_PEER_CACHED_FRM(skb))
rxstat = netif_receive_skb(skb);
else
rxstat = netif_rx_ni(skb);