diff options
author | Steve Wise <swise@opengridcomputing.com> | 2010-07-23 19:12:37 +0000 |
---|---|---|
committer | Roland Dreier <rolandd@cisco.com> | 2010-08-02 21:06:17 -0700 |
commit | ca5a22028d0845dd6bcce0dce12a7beda315baf0 (patch) | |
tree | 240d5d5973dc07f0d2e3959794a446ac0ca93546 /drivers | |
parent | d4f1a5c6efabccd4b787a8b5907a5df9204ad2f6 (diff) | |
download | op-kernel-dev-ca5a22028d0845dd6bcce0dce12a7beda315baf0.zip op-kernel-dev-ca5a22028d0845dd6bcce0dce12a7beda315baf0.tar.gz |
RDMA/cxgb4: Set/reset the EP timer inside EP lock
Endpoint timer manipulation needs to be done inside the lock. Otherwise
we can get into a situation where a timer is stopped before it is started,
which hits the WARN_ON() in stop_ep_timer().
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/infiniband/hw/cxgb4/cm.c | 34 |
1 files changed, 8 insertions, 26 deletions
diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c index ffdc308..3eff5df 100644 --- a/drivers/infiniband/hw/cxgb4/cm.c +++ b/drivers/infiniband/hw/cxgb4/cm.c @@ -1484,8 +1484,6 @@ static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb) int closing = 0; struct tid_info *t = dev->rdev.lldi.tids; unsigned int tid = GET_TID(hdr); - int start_timer = 0; - int stop_timer = 0; ep = lookup_tid(t, tid); PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); @@ -1522,7 +1520,7 @@ static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb) wake_up(&ep->com.waitq); break; case FPDU_MODE: - start_timer = 1; + start_ep_timer(ep); __state_set(&ep->com, CLOSING); closing = 1; peer_close_upcall(ep); @@ -1535,7 +1533,7 @@ static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb) disconnect = 0; break; case MORIBUND: - stop_timer = 1; + stop_ep_timer(ep); if (ep->com.cm_id && ep->com.qp) { attrs.next_state = C4IW_QP_STATE_IDLE; c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, @@ -1558,10 +1556,6 @@ static int peer_close(struct c4iw_dev *dev, struct sk_buff *skb) c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); } - if (start_timer) - start_ep_timer(ep); - if (stop_timer) - stop_ep_timer(ep); if (disconnect) c4iw_ep_disconnect(ep, 0, GFP_KERNEL); if (release) @@ -1590,7 +1584,6 @@ static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb) unsigned long flags; struct tid_info *t = dev->rdev.lldi.tids; unsigned int tid = GET_TID(req); - int stop_timer = 0; ep = lookup_tid(t, tid); if (is_neg_adv_abort(req->status)) { @@ -1605,10 +1598,10 @@ static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb) case CONNECTING: break; case MPA_REQ_WAIT: - stop_timer = 1; + stop_ep_timer(ep); break; case MPA_REQ_SENT: - stop_timer = 1; + stop_ep_timer(ep); connect_reply_upcall(ep, -ECONNRESET); break; case MPA_REP_SENT: @@ -1632,7 +1625,7 @@ static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb) break; case MORIBUND: case CLOSING: - stop_timer = 1; + stop_ep_timer(ep); /*FALLTHROUGH*/ case FPDU_MODE: if (ep->com.cm_id && ep->com.qp) { @@ -1678,8 +1671,6 @@ static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb) rpl->cmd = CPL_ABORT_NO_RST; c4iw_ofld_send(&ep->com.dev->rdev, rpl_skb); out: - if (stop_timer) - stop_ep_timer(ep); if (release) release_ep_resources(ep); return 0; @@ -1694,7 +1685,6 @@ static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb) int release = 0; struct tid_info *t = dev->rdev.lldi.tids; unsigned int tid = GET_TID(rpl); - int stop_timer = 0; ep = lookup_tid(t, tid); @@ -1708,7 +1698,7 @@ static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb) __state_set(&ep->com, MORIBUND); break; case MORIBUND: - stop_timer = 1; + stop_ep_timer(ep); if ((ep->com.cm_id) && (ep->com.qp)) { attrs.next_state = C4IW_QP_STATE_IDLE; c4iw_modify_qp(ep->com.qp->rhp, @@ -1728,8 +1718,6 @@ static int close_con_rpl(struct c4iw_dev *dev, struct sk_buff *skb) break; } spin_unlock_irqrestore(&ep->com.lock, flags); - if (stop_timer) - stop_ep_timer(ep); if (release) release_ep_resources(ep); return 0; @@ -2108,8 +2096,6 @@ int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp) int close = 0; int fatal = 0; struct c4iw_rdev *rdev; - int start_timer = 0; - int stop_timer = 0; spin_lock_irqsave(&ep->com.lock, flags); @@ -2133,7 +2119,7 @@ int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp) ep->com.state = ABORTING; else { ep->com.state = CLOSING; - start_timer = 1; + start_ep_timer(ep); } set_bit(CLOSE_SENT, &ep->com.flags); break; @@ -2141,7 +2127,7 @@ int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp) if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) { close = 1; if (abrupt) { - stop_timer = 1; + stop_ep_timer(ep); ep->com.state = ABORTING; } else ep->com.state = MORIBUND; @@ -2159,10 +2145,6 @@ int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp) } spin_unlock_irqrestore(&ep->com.lock, flags); - if (start_timer) - start_ep_timer(ep); - if (stop_timer) - stop_ep_timer(ep); if (close) { if (abrupt) ret = abort_connection(ep, NULL, gfp); |