* [PATCH net-next] sctp: remove rcu_read_lock from sctp_bind_addr_state
@ 2019-07-08 16:59 Xin Long
2019-07-09 3:18 ` David Miller
0 siblings, 1 reply; 2+ messages in thread
From: Xin Long @ 2019-07-08 16:59 UTC (permalink / raw)
To: network dev, linux-sctp; +Cc: Marcelo Ricardo Leitner, Neil Horman, davem
sctp_bind_addr_state() is called either in packet rcv path or
by sctp_copy_local_addr_list(), which are under rcu_read_lock.
So there's no need to call it again in sctp_bind_addr_state().
Signed-off-by: Xin Long <lucien.xin@gmail.com>
---
net/sctp/bind_addr.c | 13 ++++---------
1 file changed, 4 insertions(+), 9 deletions(-)
diff --git a/net/sctp/bind_addr.c b/net/sctp/bind_addr.c
index f54333c..53bc615 100644
--- a/net/sctp/bind_addr.c
+++ b/net/sctp/bind_addr.c
@@ -393,24 +393,19 @@ int sctp_bind_addr_state(const struct sctp_bind_addr *bp,
{
struct sctp_sockaddr_entry *laddr;
struct sctp_af *af;
- int state = -1;
af = sctp_get_af_specific(addr->sa.sa_family);
if (unlikely(!af))
- return state;
+ return -1;
- rcu_read_lock();
list_for_each_entry_rcu(laddr, &bp->address_list, list) {
if (!laddr->valid)
continue;
- if (af->cmp_addr(&laddr->a, addr)) {
- state = laddr->state;
- break;
- }
+ if (af->cmp_addr(&laddr->a, addr))
+ return laddr->state;
}
- rcu_read_unlock();
- return state;
+ return -1;
}
/* Find the first address in the bind address list that is not present in
--
2.1.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH net-next] sctp: remove rcu_read_lock from sctp_bind_addr_state
2019-07-08 16:59 [PATCH net-next] sctp: remove rcu_read_lock from sctp_bind_addr_state Xin Long
@ 2019-07-09 3:18 ` David Miller
0 siblings, 0 replies; 2+ messages in thread
From: David Miller @ 2019-07-09 3:18 UTC (permalink / raw)
To: lucien.xin; +Cc: netdev, linux-sctp, marcelo.leitner, nhorman
From: Xin Long <lucien.xin@gmail.com>
Date: Tue, 9 Jul 2019 00:59:40 +0800
> sctp_bind_addr_state() is called either in packet rcv path or
> by sctp_copy_local_addr_list(), which are under rcu_read_lock.
> So there's no need to call it again in sctp_bind_addr_state().
>
> Signed-off-by: Xin Long <lucien.xin@gmail.com>
This is correct, patch applied.
Thanks.
^ permalink raw reply [flat|nested] 2+ messages in thread
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