diff options
| author | Steve Wise <swise@opengridcomputing.com> | 2014-03-21 20:40:37 +0530 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2014-04-02 08:53:54 -0700 |
| commit | c529fb50463992982c246155e095577aa0485f57 (patch) | |
| tree | a25ce0a83d90860a7266419baddff6f3da55a581 /drivers/infiniband/hw | |
| parent | 977116c69862a6062f302395cb3546544d7e1bc1 (diff) | |
RDMA/cxgb4: rx_data() needs to hold the ep mutex
To avoid racing with other threads doing close/flush/whatever, rx_data()
should hold the endpoint mutex.
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/hw')
| -rw-r--r-- | drivers/infiniband/hw/cxgb4/cm.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c index 8a645d872483..26046c23334c 100644 --- a/drivers/infiniband/hw/cxgb4/cm.c +++ b/drivers/infiniband/hw/cxgb4/cm.c @@ -1170,7 +1170,7 @@ static void process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb) * the connection. */ stop_ep_timer(ep); - if (state_read(&ep->com) != MPA_REQ_SENT) + if (ep->com.state != MPA_REQ_SENT) return; /* @@ -1245,7 +1245,7 @@ static void process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb) * start reply message including private data. And * the MPA header is valid. */ - state_set(&ep->com, FPDU_MODE); + __state_set(&ep->com, FPDU_MODE); ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; ep->mpa_attr.recv_marker_enabled = markers_enabled; ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; @@ -1360,7 +1360,7 @@ static void process_mpa_reply(struct c4iw_ep *ep, struct sk_buff *skb) } goto out; err: - state_set(&ep->com, ABORTING); + __state_set(&ep->com, ABORTING); send_abort(ep, skb, GFP_KERNEL); out: connect_reply_upcall(ep, err); @@ -1375,7 +1375,7 @@ static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb) PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); - if (state_read(&ep->com) != MPA_REQ_WAIT) + if (ep->com.state != MPA_REQ_WAIT) return; /* @@ -1496,7 +1496,7 @@ static void process_mpa_request(struct c4iw_ep *ep, struct sk_buff *skb) ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version, ep->mpa_attr.p2p_type); - state_set(&ep->com, MPA_REQ_RCVD); + __state_set(&ep->com, MPA_REQ_RCVD); stop_ep_timer(ep); /* drive upcall */ @@ -1526,11 +1526,12 @@ static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb) PDBG("%s ep %p tid %u dlen %u\n", __func__, ep, ep->hwtid, dlen); skb_pull(skb, sizeof(*hdr)); skb_trim(skb, dlen); + mutex_lock(&ep->com.mutex); /* update RX credits */ update_rx_credits(ep, dlen); - switch (state_read(&ep->com)) { + switch (ep->com.state) { case MPA_REQ_SENT: ep->rcv_seq += dlen; process_mpa_reply(ep, skb); @@ -1546,7 +1547,7 @@ static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb) pr_err("%s Unexpected streaming data." \ " qpid %u ep %p state %d tid %u status %d\n", __func__, ep->com.qp->wq.sq.qid, ep, - state_read(&ep->com), ep->hwtid, status); + ep->com.state, ep->hwtid, status); attrs.next_state = C4IW_QP_STATE_TERMINATE; c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 0); @@ -1555,6 +1556,7 @@ static int rx_data(struct c4iw_dev *dev, struct sk_buff *skb) default: break; } + mutex_unlock(&ep->com.mutex); return 0; } |