linux-kernel - [PATCH 1/3] infiniband: hw: hfi1: verbs.c: Use built-in RCU list checking

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Message-Id: <20200107192912.22691-1-madhuparnabhowmik04@gmail.com>
Date:   Wed,  8 Jan 2020 00:59:12 +0530
From:   madhuparnabhowmik04@...il.com
To:     dennis.dalessandro@...el.com, mike.marciniszyn@...el.com,
        dledford@...hat.com, paulmck@...nel.org
Cc:     rcu@...r.kernel.org, joel@...lfernandes.org, frextrite@...il.com,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
        Madhuparna Bhowmik <madhuparnabhowmik04@...il.com>
Subject: [PATCH 1/3] infiniband: hw: hfi1: verbs.c: Use built-in RCU list checking

From: Madhuparna Bhowmik <madhuparnabhowmik04@...il.com>

list_for_each_entry_rcu has built-in RCU and lock checking.
Pass cond argument to list_for_each_entry_rcu.

Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik04@...il.com>
---
 drivers/infiniband/hw/hfi1/verbs.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/hfi1/verbs.c b/drivers/infiniband/hw/hfi1/verbs.c
index 089e201d7550..e6abdbcb4ffb 100644
--- a/drivers/infiniband/hw/hfi1/verbs.c
+++ b/drivers/infiniband/hw/hfi1/verbs.c
@@ -515,7 +515,8 @@ static inline void hfi1_handle_packet(struct hfi1_packet *packet,
 				       opa_get_lid(packet->dlid, 9B));
 		if (!mcast)
 			goto drop;
-		list_for_each_entry_rcu(p, &mcast->qp_list, list) {
+		list_for_each_entry_rcu(p, &mcast->qp_list, list,
+					lock_is_held(&(ibp->rvp.lock).dep_map)) {
 			packet->qp = p->qp;
 			if (hfi1_do_pkey_check(packet))
 				goto drop;
-- 
2.17.1