From e4b76a2a2619e95deb1ae2b088c0aa4f24a0bbee Mon Sep 17 00:00:00 2001 From: Hariprasad S Date: Fri, 6 May 2016 22:17:59 +0530 Subject: [PATCH] RDMA/iw_cxgb4: stop_ep_timer() after MPA negotiation ->Stop the ep timer after MPA negotiation so that the arp failures during send_mpa_reply/reject will be handled by process_timeout() after the ep timer expires. ->Added case MPA_REP_SENT in process_timeout(). ->For MPA reject, c4iw_ep_disconnect tries to start an already started timer, which leads to warning message "timer already started". -> In case of mpa reject stop the timer and call send_mpa_reject(). -> Added new ep flag STOP_MPA_TIMER to tell fw4_ack() to stop the timer only for send_mpa_reply(), which is set in c4iw_accept_cr(). Signed-off-by: Steve Wise Signed-off-by: Hariprasad Shenai Signed-off-by: Doug Ledford --- drivers/infiniband/hw/cxgb4/cm.c | 39 +++++++++++++------------- drivers/infiniband/hw/cxgb4/iw_cxgb4.h | 1 + 2 files changed, 20 insertions(+), 20 deletions(-) diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c index c7b3d5751963..410154c86061 100644 --- a/drivers/infiniband/hw/cxgb4/cm.c +++ b/drivers/infiniband/hw/cxgb4/cm.c @@ -1047,7 +1047,6 @@ static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen) */ skb_get(skb); set_wr_txq(skb, CPL_PRIORITY_DATA, ep->txq_idx); - t4_set_arp_err_handler(skb, NULL, arp_failure_discard); BUG_ON(ep->mpa_skb); ep->mpa_skb = skb; ep->snd_seq += mpalen; @@ -1132,7 +1131,6 @@ static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen) * Function fw4_ack() will deref it. */ skb_get(skb); - t4_set_arp_err_handler(skb, NULL, arp_failure_discard); ep->mpa_skb = skb; __state_set(&ep->com, MPA_REP_SENT); ep->snd_seq += mpalen; @@ -1744,25 +1742,17 @@ static int 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); - /* - * If the endpoint timer already expired, then we ignore - * the start request. process_timeout() will abort - * the connection. - */ - if (!stop_ep_timer(ep)) { - __state_set(&ep->com, MPA_REQ_RCVD); - - /* drive upcall */ - mutex_lock_nested(&ep->parent_ep->com.mutex, - SINGLE_DEPTH_NESTING); - if (ep->parent_ep->com.state != DEAD) { - if (connect_request_upcall(ep)) - goto err_unlock_parent; - } else { + __state_set(&ep->com, MPA_REQ_RCVD); + + /* drive upcall */ + mutex_lock_nested(&ep->parent_ep->com.mutex, SINGLE_DEPTH_NESTING); + if (ep->parent_ep->com.state != DEAD) { + if (connect_request_upcall(ep)) goto err_unlock_parent; - } - mutex_unlock(&ep->parent_ep->com.mutex); + } else { + goto err_unlock_parent; } + mutex_unlock(&ep->parent_ep->com.mutex); return 0; err_unlock_parent: @@ -2926,6 +2916,10 @@ static int fw4_ack(struct c4iw_dev *dev, struct sk_buff *skb) state_read(&ep->com), ep->mpa_attr.initiator ? 1 : 0); kfree_skb(ep->mpa_skb); ep->mpa_skb = NULL; + mutex_lock(&ep->com.mutex); + if (test_bit(STOP_MPA_TIMER, &ep->com.flags)) + stop_ep_timer(ep); + mutex_unlock(&ep->com.mutex); } return 0; } @@ -2952,8 +2946,10 @@ int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) disconnect = 1; } mutex_unlock(&ep->com.mutex); - if (disconnect) + if (disconnect) { + stop_ep_timer(ep); err = c4iw_ep_disconnect(ep, disconnect == 2, GFP_KERNEL); + } c4iw_put_ep(&ep->com); return 0; } @@ -3047,6 +3043,8 @@ int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) ep->com.qp, mask, &attrs, 1); if (err) goto err_deref_cm_id; + + set_bit(STOP_MPA_TIMER, &ep->com.flags); err = send_mpa_reply(ep, conn_param->private_data, conn_param->private_data_len); if (err) @@ -3968,6 +3966,7 @@ static void process_timeout(struct c4iw_ep *ep) connect_reply_upcall(ep, -ETIMEDOUT); break; case MPA_REQ_WAIT: + case MPA_REP_SENT: __state_set(&ep->com, ABORTING); break; case CLOSING: diff --git a/drivers/infiniband/hw/cxgb4/iw_cxgb4.h b/drivers/infiniband/hw/cxgb4/iw_cxgb4.h index 67710aeeb4f2..d4e2b519a192 100644 --- a/drivers/infiniband/hw/cxgb4/iw_cxgb4.h +++ b/drivers/infiniband/hw/cxgb4/iw_cxgb4.h @@ -755,6 +755,7 @@ enum c4iw_ep_flags { CLOSE_SENT = 3, TIMEOUT = 4, QP_REFERENCED = 5, + STOP_MPA_TIMER = 7, }; enum c4iw_ep_history { -- 2.20.1