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authorSteve Wise <swise@opengridcomputing.com>2014-03-21 19:10:37 +0400
committerRoland Dreier <roland@purestorage.com>2014-04-02 19:53:54 +0400
commitc529fb50463992982c246155e095577aa0485f57 (patch)
treea25ce0a83d90860a7266419baddff6f3da55a581 /drivers/infiniband
parent977116c69862a6062f302395cb3546544d7e1bc1 (diff)
downloadlinux-c529fb50463992982c246155e095577aa0485f57.tar.xz
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')
-rw-r--r--drivers/infiniband/hw/cxgb4/cm.c16
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;
}