netdev - [PATCH net-next v1] vsock/loopback: don't disable irqs for queue access

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Message-ID: <a4f17ab9-4be9-1b0a-0fc0-9fa8ef98273d@sberdevices.ru>
Date:   Thu, 13 Apr 2023 12:17:19 +0300
From:   Arseniy Krasnov <avkrasnov@...rdevices.ru>
To:     Stefan Hajnoczi <stefanha@...hat.com>,
        Stefano Garzarella <sgarzare@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Bobby Eshleman <bobby.eshleman@...edance.com>
CC:     <kvm@...r.kernel.org>, <virtualization@...ts.linux-foundation.org>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <kernel@...rdevices.ru>, <oxffffaa@...il.com>,
        <avkrasnov@...rdevices.ru>
Subject: [PATCH net-next v1] vsock/loopback: don't disable irqs for queue
 access

This replaces 'skb_queue_tail()' with 'virtio_vsock_skb_queue_tail()'.
The first one uses 'spin_lock_irqsave()', second uses 'spin_lock_bh()'.
There is no need to disable interrupts in the loopback transport as
there is no access to the queue with skbs from interrupt context. Both
virtio and vhost transports work in the same way.

Signed-off-by: Arseniy Krasnov <AVKrasnov@...rdevices.ru>
Reviewed-by: Stefano Garzarella <sgarzare@...hat.com>
---
 net/vmw_vsock/vsock_loopback.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/vmw_vsock/vsock_loopback.c b/net/vmw_vsock/vsock_loopback.c
index e3afc0c866f5..5c6360df1f31 100644
--- a/net/vmw_vsock/vsock_loopback.c
+++ b/net/vmw_vsock/vsock_loopback.c
@@ -31,8 +31,7 @@ static int vsock_loopback_send_pkt(struct sk_buff *skb)
 	struct vsock_loopback *vsock = &the_vsock_loopback;
 	int len = skb->len;
 
-	skb_queue_tail(&vsock->pkt_queue, skb);
-
+	virtio_vsock_skb_queue_tail(&vsock->pkt_queue, skb);
 	queue_work(vsock->workqueue, &vsock->pkt_work);
 
 	return len;
-- 
2.25.1