RDMA/rxe: Convert spin_{lock_bh,unlock_bh} to spin_{lock_irqsave,unlock_irqrestore}

We need to call spin_lock_irqsave()/spin_unlock_irqrestore() for
state_lock in rxe, otherwsie the callchain:

  ib_post_send_mad
	-> spin_lock_irqsave
	-> ib_post_send -> rxe_post_send
				-> spin_lock_bh
				-> spin_unlock_bh
	-> spin_unlock_irqrestore

Causes below traces during run block nvmeof-mp/001 test due to mismatched
spinlock nesting:

  WARNING: CPU: 0 PID: 94794 at kernel/softirq.c:376 __local_bh_enable_ip+0xc2/0x140
  [ ... ]
  CPU: 0 PID: 94794 Comm: kworker/u4:1 Tainted: G            E      6.4.0-rc1 #9
  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.15.0-0-g2dd4b9b-rebuilt.opensuse.org 04/01/2014
  Workqueue: rdma_cm cma_work_handler [rdma_cm]
  RIP: 0010:__local_bh_enable_ip+0xc2/0x140
  Code: 48 85 c0 74 72 5b 41 5c 5d 31 c0 89 c2 89 c1 89 c6 89 c7 41 89 c0 e9 bd 0e 11 01 65 8b 05 f2 65 72 48 85 c0 0f 85 76 ff ff ff <0f> 0b e9 6f ff ff ff e8 d2 39 1c 00 eb 80 4c 89 e7 e8 68 ad 0a 00
  RSP: 0018:ffffb7cf818539f0 EFLAGS: 00010046
  RAX: 0000000000000000 RBX: 0000000000000201 RCX: 0000000000000000
  RDX: 0000000000000000 RSI: 0000000000000201 RDI: ffffffffc0f25f79
  RBP: ffffb7cf81853a00 R08: 0000000000000000 R09: 0000000000000000
  R10: 0000000000000000 R11: 0000000000000000 R12: ffffffffc0f25f79
  R13: ffff8db1f0fa6000 R14: ffff8db2c63ff000 R15: 00000000000000e8
  FS:  0000000000000000(0000) GS:ffff8db33bc00000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 0000559758db0f20 CR3: 0000000105124000 CR4: 00000000003506f0
  Call Trace:
   <TASK>
   _raw_spin_unlock_bh+0x31/0x40
   rxe_post_send+0x59/0x8b0 [rdma_rxe]
   ib_send_mad+0x26b/0x470 [ib_core]
   ib_post_send_mad+0x150/0xb40 [ib_core]
   ? cm_form_tid+0x5b/0x90 [ib_cm]
   ib_send_cm_req+0x7c8/0xb70 [ib_cm]
   rdma_connect_locked+0x433/0x940 [rdma_cm]
   nvme_rdma_cm_handler+0x5d7/0x9c0 [nvme_rdma]
   cma_cm_event_handler+0x4f/0x170 [rdma_cm]
   cma_work_handler+0x6a/0xe0 [rdma_cm]
   process_one_work+0x2a9/0x580
   worker_thread+0x52/0x3f0
   ? __pfx_worker_thread+0x10/0x10
   kthread+0x109/0x140
   ? __pfx_kthread+0x10/0x10
   ret_from_fork+0x2c/0x50
   </TASK>


  raw_local_irq_restore() called with IRQs enabled
  WARNING: CPU: 0 PID: 94794 at kernel/locking/irqflag-debug.c:10 warn_bogus_irq_restore+0x37/0x60
  [ ... ]
  CPU: 0 PID: 94794 Comm: kworker/u4:1 Tainted: G        W   E      6.4.0-rc1 #9
  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.15.0-0-g2dd4b9b-rebuilt.opensuse.org 04/01/2014
  Workqueue: rdma_cm cma_work_handler [rdma_cm]
  RIP: 0010:warn_bogus_irq_restore+0x37/0x60
  Code: fb 01 77 36 83 e3 01 74 0e 48 8b 5d f8 c9 31 f6 89 f7 e9 ac ea 01 00 48 c7 c7 e0 52 33 b9 c6 05 bb 1c 69 01 01 e8 39 24 f0 fe <0f> 0b 48 8b 5d f8 c9 31 f6 89 f7 e9 89 ea 01 00 0f b6 f3 48 c7 c7
  RSP: 0018:ffffb7cf81853a58 EFLAGS: 00010246
  RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
  RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
  RBP: ffffb7cf81853a60 R08: 0000000000000000 R09: 0000000000000000
  R10: 0000000000000000 R11: 0000000000000000 R12: ffff8db2cfb1a9e8
  R13: ffff8db2cfb1a9d8 R14: ffff8db2c63ff000 R15: 0000000000000000
  FS:  0000000000000000(0000) GS:ffff8db33bc00000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 0000559758db0f20 CR3: 0000000105124000 CR4: 00000000003506f0
  Call Trace:
   <TASK>
   _raw_spin_unlock_irqrestore+0x91/0xa0
   ib_send_mad+0x1e3/0x470 [ib_core]
   ib_post_send_mad+0x150/0xb40 [ib_core]
   ? cm_form_tid+0x5b/0x90 [ib_cm]
   ib_send_cm_req+0x7c8/0xb70 [ib_cm]
   rdma_connect_locked+0x433/0x940 [rdma_cm]
   nvme_rdma_cm_handler+0x5d7/0x9c0 [nvme_rdma]
   cma_cm_event_handler+0x4f/0x170 [rdma_cm]
   cma_work_handler+0x6a/0xe0 [rdma_cm]
   process_one_work+0x2a9/0x580
   worker_thread+0x52/0x3f0
   ? __pfx_worker_thread+0x10/0x10
   kthread+0x109/0x140
   ? __pfx_kthread+0x10/0x10
   ret_from_fork+0x2c/0x50
   </TASK>

Fixes: f605f26e ("RDMA/rxe: Protect QP state with qp->state_lock")
Link: https://lore.kernel.org/r/20230510035056.881196-1-guoqing.jiang@linux.devSigned-off-by: Guoqing Jiang <guoqing.jiang@linux.dev>
Reviewed-by: Bob Pearson <rpearsonhpe@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/sw/rxe/rxe_comp.c

@@ -115,15 +115,16 @@ static enum ib_wc_opcode wr_to_wc_opcode(enum ib_wr_opcode opcode)
 void retransmit_timer(struct timer_list *t)
 {
 	struct rxe_qp *qp = from_timer(qp, t, retrans_timer);
+	unsigned long flags;
 
 	rxe_dbg_qp(qp, "retransmit timer fired\n");
 
-	spin_lock_bh(&qp->state_lock);
+	spin_lock_irqsave(&qp->state_lock, flags);
 	if (qp->valid) {
 		qp->comp.timeout = 1;
 		rxe_sched_task(&qp->comp.task);
 	}
-	spin_unlock_bh(&qp->state_lock);
+	spin_unlock_irqrestore(&qp->state_lock, flags);
 }
 
 void rxe_comp_queue_pkt(struct rxe_qp *qp, struct sk_buff *skb)
@@ -481,11 +482,13 @@ static void do_complete(struct rxe_qp *qp, struct rxe_send_wqe *wqe)
 
 static void comp_check_sq_drain_done(struct rxe_qp *qp)
 {
-	spin_lock_bh(&qp->state_lock);
+	unsigned long flags;
+
+	spin_lock_irqsave(&qp->state_lock, flags);
 	if (unlikely(qp_state(qp) == IB_QPS_SQD)) {
 		if (qp->attr.sq_draining && qp->comp.psn == qp->req.psn) {
 			qp->attr.sq_draining = 0;
-			spin_unlock_bh(&qp->state_lock);
+			spin_unlock_irqrestore(&qp->state_lock, flags);
 
 			if (qp->ibqp.event_handler) {
 				struct ib_event ev;
@@ -499,7 +502,7 @@ static void comp_check_sq_drain_done(struct rxe_qp *qp)
 			return;
 		}
 	}
-	spin_unlock_bh(&qp->state_lock);
+	spin_unlock_irqrestore(&qp->state_lock, flags);
 }
 
 static inline enum comp_state complete_ack(struct rxe_qp *qp,
@@ -625,13 +628,15 @@ static void free_pkt(struct rxe_pkt_info *pkt)
  */
 static void reset_retry_timer(struct rxe_qp *qp)
 {
+	unsigned long flags;
+
 	if (qp_type(qp) == IB_QPT_RC && qp->qp_timeout_jiffies) {
-		spin_lock_bh(&qp->state_lock);
+		spin_lock_irqsave(&qp->state_lock, flags);
 		if (qp_state(qp) >= IB_QPS_RTS &&
 		    psn_compare(qp->req.psn, qp->comp.psn) > 0)
 			mod_timer(&qp->retrans_timer,
 				  jiffies + qp->qp_timeout_jiffies);
-		spin_unlock_bh(&qp->state_lock);
+		spin_unlock_irqrestore(&qp->state_lock, flags);
 	}
 }
 
@@ -643,18 +648,19 @@ int rxe_completer(struct rxe_qp *qp)
 	struct rxe_pkt_info *pkt = NULL;
 	enum comp_state state;
 	int ret;
+	unsigned long flags;
 
-	spin_lock_bh(&qp->state_lock);
+	spin_lock_irqsave(&qp->state_lock, flags);
 	if (!qp->valid || qp_state(qp) == IB_QPS_ERR ||
 			  qp_state(qp) == IB_QPS_RESET) {
 		bool notify = qp->valid && (qp_state(qp) == IB_QPS_ERR);
 
 		drain_resp_pkts(qp);
 		flush_send_queue(qp, notify);
-		spin_unlock_bh(&qp->state_lock);
+		spin_unlock_irqrestore(&qp->state_lock, flags);
 		goto exit;
 	}
-	spin_unlock_bh(&qp->state_lock);
+	spin_unlock_irqrestore(&qp->state_lock, flags);
 
 	if (qp->comp.timeout) {
 		qp->comp.timeout_retry = 1;

drivers/infiniband/sw/rxe/rxe_net.c

@@ -412,15 +412,16 @@ int rxe_xmit_packet(struct rxe_qp *qp, struct rxe_pkt_info *pkt,
 	int err;
 	int is_request = pkt->mask & RXE_REQ_MASK;
 	struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
+	unsigned long flags;
 
-	spin_lock_bh(&qp->state_lock);
+	spin_lock_irqsave(&qp->state_lock, flags);
 	if ((is_request && (qp_state(qp) < IB_QPS_RTS)) ||
 	    (!is_request && (qp_state(qp) < IB_QPS_RTR))) {
-		spin_unlock_bh(&qp->state_lock);
+		spin_unlock_irqrestore(&qp->state_lock, flags);
 		rxe_dbg_qp(qp, "Packet dropped. QP is not in ready state\n");
 		goto drop;
 	}
-	spin_unlock_bh(&qp->state_lock);
+	spin_unlock_irqrestore(&qp->state_lock, flags);
 
 	rxe_icrc_generate(skb, pkt);
 

drivers/infiniband/sw/rxe/rxe_qp.c

@@ -300,6 +300,7 @@ int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
 	struct rxe_cq *rcq = to_rcq(init->recv_cq);
 	struct rxe_cq *scq = to_rcq(init->send_cq);
 	struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL;
+	unsigned long flags;
 
 	rxe_get(pd);
 	rxe_get(rcq);
@@ -325,10 +326,10 @@ int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
 	if (err)
 		goto err2;
 
-	spin_lock_bh(&qp->state_lock);
+	spin_lock_irqsave(&qp->state_lock, flags);
 	qp->attr.qp_state = IB_QPS_RESET;
 	qp->valid = 1;
-	spin_unlock_bh(&qp->state_lock);
+	spin_unlock_irqrestore(&qp->state_lock, flags);
 
 	return 0;
 
@@ -492,24 +493,28 @@ static void rxe_qp_reset(struct rxe_qp *qp)
 /* move the qp to the error state */
 void rxe_qp_error(struct rxe_qp *qp)
 {
-	spin_lock_bh(&qp->state_lock);
+	unsigned long flags;
+
+	spin_lock_irqsave(&qp->state_lock, flags);
 	qp->attr.qp_state = IB_QPS_ERR;
 
 	/* drain work and packet queues */
 	rxe_sched_task(&qp->resp.task);
 	rxe_sched_task(&qp->comp.task);
 	rxe_sched_task(&qp->req.task);
-	spin_unlock_bh(&qp->state_lock);
+	spin_unlock_irqrestore(&qp->state_lock, flags);
 }
 
 static void rxe_qp_sqd(struct rxe_qp *qp, struct ib_qp_attr *attr,
 		       int mask)
 {
-	spin_lock_bh(&qp->state_lock);
+	unsigned long flags;
+
+	spin_lock_irqsave(&qp->state_lock, flags);
 	qp->attr.sq_draining = 1;
 	rxe_sched_task(&qp->comp.task);
 	rxe_sched_task(&qp->req.task);
-	spin_unlock_bh(&qp->state_lock);
+	spin_unlock_irqrestore(&qp->state_lock, flags);
 }
 
 /* caller should hold qp->state_lock */
@@ -555,14 +560,16 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
 		qp->attr.cur_qp_state = attr->qp_state;
 
 	if (mask & IB_QP_STATE) {
-		spin_lock_bh(&qp->state_lock);
+		unsigned long flags;
+
+		spin_lock_irqsave(&qp->state_lock, flags);
 		err = __qp_chk_state(qp, attr, mask);
 		if (!err) {
 			qp->attr.qp_state = attr->qp_state;
 			rxe_dbg_qp(qp, "state -> %s\n",
 					qps2str[attr->qp_state]);
 		}
-		spin_unlock_bh(&qp->state_lock);
+		spin_unlock_irqrestore(&qp->state_lock, flags);
 
 		if (err)
 			return err;
@@ -688,6 +695,8 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
 /* called by the query qp verb */
 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask)
 {
+	unsigned long flags;
+
 	*attr = qp->attr;
 
 	attr->rq_psn				= qp->resp.psn;
@@ -708,12 +717,12 @@ int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask)
 	/* Applications that get this state typically spin on it.
 	 * Yield the processor
 	 */
-	spin_lock_bh(&qp->state_lock);
+	spin_lock_irqsave(&qp->state_lock, flags);
 	if (qp->attr.sq_draining) {
-		spin_unlock_bh(&qp->state_lock);
+		spin_unlock_irqrestore(&qp->state_lock, flags);
 		cond_resched();
 	} else {
-		spin_unlock_bh(&qp->state_lock);
+		spin_unlock_irqrestore(&qp->state_lock, flags);
 	}
 
 	return 0;
@@ -737,10 +746,11 @@ int rxe_qp_chk_destroy(struct rxe_qp *qp)
 static void rxe_qp_do_cleanup(struct work_struct *work)
 {
 	struct rxe_qp *qp = container_of(work, typeof(*qp), cleanup_work.work);
+	unsigned long flags;
 
-	spin_lock_bh(&qp->state_lock);
+	spin_lock_irqsave(&qp->state_lock, flags);
 	qp->valid = 0;
-	spin_unlock_bh(&qp->state_lock);
+	spin_unlock_irqrestore(&qp->state_lock, flags);
 	qp->qp_timeout_jiffies = 0;
 
 	if (qp_type(qp) == IB_QPT_RC) {

drivers/infiniband/sw/rxe/rxe_recv.c

@@ -14,6 +14,7 @@ static int check_type_state(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
 			    struct rxe_qp *qp)
 {
 	unsigned int pkt_type;
+	unsigned long flags;
 
 	if (unlikely(!qp->valid))
 		return -EINVAL;
@@ -38,19 +39,19 @@ static int check_type_state(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
 		return -EINVAL;
 	}
 
-	spin_lock_bh(&qp->state_lock);
+	spin_lock_irqsave(&qp->state_lock, flags);
 	if (pkt->mask & RXE_REQ_MASK) {
 		if (unlikely(qp_state(qp) < IB_QPS_RTR)) {
-			spin_unlock_bh(&qp->state_lock);
+			spin_unlock_irqrestore(&qp->state_lock, flags);
 			return -EINVAL;
 		}
 	} else {
 		if (unlikely(qp_state(qp) < IB_QPS_RTS)) {
-			spin_unlock_bh(&qp->state_lock);
+			spin_unlock_irqrestore(&qp->state_lock, flags);
 			return -EINVAL;
 		}
 	}
-	spin_unlock_bh(&qp->state_lock);
+	spin_unlock_irqrestore(&qp->state_lock, flags);
 
 	return 0;
 }

drivers/infiniband/sw/rxe/rxe_req.c

@@ -99,17 +99,18 @@ static void req_retry(struct rxe_qp *qp)
 void rnr_nak_timer(struct timer_list *t)
 {
 	struct rxe_qp *qp = from_timer(qp, t, rnr_nak_timer);
+	unsigned long flags;
 
 	rxe_dbg_qp(qp, "nak timer fired\n");
 
-	spin_lock_bh(&qp->state_lock);
+	spin_lock_irqsave(&qp->state_lock, flags);
 	if (qp->valid) {
 		/* request a send queue retry */
 		qp->req.need_retry = 1;
 		qp->req.wait_for_rnr_timer = 0;
 		rxe_sched_task(&qp->req.task);
 	}
-	spin_unlock_bh(&qp->state_lock);
+	spin_unlock_irqrestore(&qp->state_lock, flags);
 }
 
 static void req_check_sq_drain_done(struct rxe_qp *qp)
@@ -118,8 +119,9 @@ static void req_check_sq_drain_done(struct rxe_qp *qp)
 	unsigned int index;
 	unsigned int cons;
 	struct rxe_send_wqe *wqe;
+	unsigned long flags;
 
-	spin_lock_bh(&qp->state_lock);
+	spin_lock_irqsave(&qp->state_lock, flags);
 	if (qp_state(qp) == IB_QPS_SQD) {
 		q = qp->sq.queue;
 		index = qp->req.wqe_index;
@@ -140,7 +142,7 @@ static void req_check_sq_drain_done(struct rxe_qp *qp)
 				break;
 
 			qp->attr.sq_draining = 0;
-			spin_unlock_bh(&qp->state_lock);
+			spin_unlock_irqrestore(&qp->state_lock, flags);
 
 			if (qp->ibqp.event_handler) {
 				struct ib_event ev;
@@ -154,7 +156,7 @@ static void req_check_sq_drain_done(struct rxe_qp *qp)
 			return;
 		} while (0);
 	}
-	spin_unlock_bh(&qp->state_lock);
+	spin_unlock_irqrestore(&qp->state_lock, flags);
 }
 
 static struct rxe_send_wqe *__req_next_wqe(struct rxe_qp *qp)
@@ -173,6 +175,7 @@ static struct rxe_send_wqe *__req_next_wqe(struct rxe_qp *qp)
 static struct rxe_send_wqe *req_next_wqe(struct rxe_qp *qp)
 {
 	struct rxe_send_wqe *wqe;
+	unsigned long flags;
 
 	req_check_sq_drain_done(qp);
 
@@ -180,13 +183,13 @@ static struct rxe_send_wqe *req_next_wqe(struct rxe_qp *qp)
 	if (wqe == NULL)
 		return NULL;
 
-	spin_lock_bh(&qp->state_lock);
+	spin_lock_irqsave(&qp->state_lock, flags);
 	if (unlikely((qp_state(qp) == IB_QPS_SQD) &&
 		     (wqe->state != wqe_state_processing))) {
-		spin_unlock_bh(&qp->state_lock);
+		spin_unlock_irqrestore(&qp->state_lock, flags);
 		return NULL;
 	}
-	spin_unlock_bh(&qp->state_lock);
+	spin_unlock_irqrestore(&qp->state_lock, flags);
 
 	wqe->mask = wr_opcode_mask(wqe->wr.opcode, qp);
 	return wqe;
@@ -676,16 +679,17 @@ int rxe_requester(struct rxe_qp *qp)
 	struct rxe_queue *q = qp->sq.queue;
 	struct rxe_ah *ah;
 	struct rxe_av *av;
+	unsigned long flags;
 
-	spin_lock_bh(&qp->state_lock);
+	spin_lock_irqsave(&qp->state_lock, flags);
 	if (unlikely(!qp->valid)) {
-		spin_unlock_bh(&qp->state_lock);
+		spin_unlock_irqrestore(&qp->state_lock, flags);
 		goto exit;
 	}
 
 	if (unlikely(qp_state(qp) == IB_QPS_ERR)) {
 		wqe = __req_next_wqe(qp);
-		spin_unlock_bh(&qp->state_lock);
+		spin_unlock_irqrestore(&qp->state_lock, flags);
 		if (wqe)
 			goto err;
 		else
@@ -700,10 +704,10 @@ int rxe_requester(struct rxe_qp *qp)
 		qp->req.wait_psn = 0;
 		qp->req.need_retry = 0;
 		qp->req.wait_for_rnr_timer = 0;
-		spin_unlock_bh(&qp->state_lock);
+		spin_unlock_irqrestore(&qp->state_lock, flags);
 		goto exit;
 	}
-	spin_unlock_bh(&qp->state_lock);
+	spin_unlock_irqrestore(&qp->state_lock, flags);
 
 	/* we come here if the retransmit timer has fired
 	 * or if the rnr timer has fired. If the retransmit

drivers/infiniband/sw/rxe/rxe_resp.c

@@ -1047,6 +1047,7 @@ static enum resp_states do_complete(struct rxe_qp *qp,
 	struct ib_uverbs_wc *uwc = &cqe.uibwc;
 	struct rxe_recv_wqe *wqe = qp->resp.wqe;
 	struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
+	unsigned long flags;
 
 	if (!wqe)
 		goto finish;
@@ -1137,12 +1138,12 @@ static enum resp_states do_complete(struct rxe_qp *qp,
 		return RESPST_ERR_CQ_OVERFLOW;
 
 finish:
-	spin_lock_bh(&qp->state_lock);
+	spin_lock_irqsave(&qp->state_lock, flags);
 	if (unlikely(qp_state(qp) == IB_QPS_ERR)) {
-		spin_unlock_bh(&qp->state_lock);
+		spin_unlock_irqrestore(&qp->state_lock, flags);
 		return RESPST_CHK_RESOURCE;
 	}
-	spin_unlock_bh(&qp->state_lock);
+	spin_unlock_irqrestore(&qp->state_lock, flags);
 
 	if (unlikely(!pkt))
 		return RESPST_DONE;
@@ -1468,18 +1469,19 @@ int rxe_responder(struct rxe_qp *qp)
 	enum resp_states state;
 	struct rxe_pkt_info *pkt = NULL;
 	int ret;
+	unsigned long flags;
 
-	spin_lock_bh(&qp->state_lock);
+	spin_lock_irqsave(&qp->state_lock, flags);
 	if (!qp->valid || qp_state(qp) == IB_QPS_ERR ||
 			  qp_state(qp) == IB_QPS_RESET) {
 		bool notify = qp->valid && (qp_state(qp) == IB_QPS_ERR);
 
 		drain_req_pkts(qp);
 		flush_recv_queue(qp, notify);
-		spin_unlock_bh(&qp->state_lock);
+		spin_unlock_irqrestore(&qp->state_lock, flags);
 		goto exit;
 	}
-	spin_unlock_bh(&qp->state_lock);
+	spin_unlock_irqrestore(&qp->state_lock, flags);
 
 	qp->resp.aeth_syndrome = AETH_ACK_UNLIMITED;
 

drivers/infiniband/sw/rxe/rxe_verbs.c

@@ -904,10 +904,10 @@ static int rxe_post_send_kernel(struct rxe_qp *qp,
 	if (!err)
 		rxe_sched_task(&qp->req.task);
 
-	spin_lock_bh(&qp->state_lock);
+	spin_lock_irqsave(&qp->state_lock, flags);
 	if (qp_state(qp) == IB_QPS_ERR)
 		rxe_sched_task(&qp->comp.task);
-	spin_unlock_bh(&qp->state_lock);
+	spin_unlock_irqrestore(&qp->state_lock, flags);
 
 	return err;
 }
@@ -917,22 +917,23 @@ static int rxe_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
 {
 	struct rxe_qp *qp = to_rqp(ibqp);
 	int err;
+	unsigned long flags;
 
-	spin_lock_bh(&qp->state_lock);
+	spin_lock_irqsave(&qp->state_lock, flags);
 	/* caller has already called destroy_qp */
 	if (WARN_ON_ONCE(!qp->valid)) {
-		spin_unlock_bh(&qp->state_lock);
+		spin_unlock_irqrestore(&qp->state_lock, flags);
 		rxe_err_qp(qp, "qp has been destroyed");
 		return -EINVAL;
 	}
 
 	if (unlikely(qp_state(qp) < IB_QPS_RTS)) {
-		spin_unlock_bh(&qp->state_lock);
+		spin_unlock_irqrestore(&qp->state_lock, flags);
 		*bad_wr = wr;
 		rxe_err_qp(qp, "qp not ready to send");
 		return -EINVAL;
 	}
-	spin_unlock_bh(&qp->state_lock);
+	spin_unlock_irqrestore(&qp->state_lock, flags);
 
 	if (qp->is_user) {
 		/* Utilize process context to do protocol processing */
@@ -1008,22 +1009,22 @@ static int rxe_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
 	struct rxe_rq *rq = &qp->rq;
 	unsigned long flags;
 
-	spin_lock_bh(&qp->state_lock);
+	spin_lock_irqsave(&qp->state_lock, flags);
 	/* caller has already called destroy_qp */
 	if (WARN_ON_ONCE(!qp->valid)) {
-		spin_unlock_bh(&qp->state_lock);
+		spin_unlock_irqrestore(&qp->state_lock, flags);
 		rxe_err_qp(qp, "qp has been destroyed");
 		return -EINVAL;
 	}
 
 	/* see C10-97.2.1 */
 	if (unlikely((qp_state(qp) < IB_QPS_INIT))) {
-		spin_unlock_bh(&qp->state_lock);
+		spin_unlock_irqrestore(&qp->state_lock, flags);
 		*bad_wr = wr;
 		rxe_dbg_qp(qp, "qp not ready to post recv");
 		return -EINVAL;
 	}
-	spin_unlock_bh(&qp->state_lock);
+	spin_unlock_irqrestore(&qp->state_lock, flags);
 
 	if (unlikely(qp->srq)) {
 		*bad_wr = wr;
@@ -1044,10 +1045,10 @@ static int rxe_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
 
 	spin_unlock_irqrestore(&rq->producer_lock, flags);
 
-	spin_lock_bh(&qp->state_lock);
+	spin_lock_irqsave(&qp->state_lock, flags);
 	if (qp_state(qp) == IB_QPS_ERR)
 		rxe_sched_task(&qp->resp.task);
-	spin_unlock_bh(&qp->state_lock);
+	spin_unlock_irqrestore(&qp->state_lock, flags);
 
 	return err;
 }