netdev - [PATCH V2 6/6] irqbypass: do not start cons/prod when failed connect

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Message-Id: <1594898629-18790-7-git-send-email-lingshan.zhu@intel.com>
Date:   Thu, 16 Jul 2020 19:23:49 +0800
From:   Zhu Lingshan <lingshan.zhu@...el.com>
To:     mst@...hat.com, alex.williamson@...hat.com, pbonzini@...hat.com,
        sean.j.christopherson@...el.com, wanpengli@...cent.com,
        jasowang@...hat.com
Cc:     virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        kvm@...r.kernel.org, Zhu Lingshan <lingshan.zhu@...el.com>
Subject: [PATCH V2 6/6] irqbypass: do not start cons/prod when failed connect

If failed to connect, there is no need to start consumer nor
producer.

Signed-off-by: Zhu Lingshan <lingshan.zhu@...el.com>
Suggested-by: Jason Wang <jasowang@...hat.com>
---
 virt/lib/irqbypass.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/virt/lib/irqbypass.c b/virt/lib/irqbypass.c
index 28fda42..c9bb395 100644
--- a/virt/lib/irqbypass.c
+++ b/virt/lib/irqbypass.c
@@ -40,17 +40,21 @@ static int __connect(struct irq_bypass_producer *prod,
 	if (prod->add_consumer)
 		ret = prod->add_consumer(prod, cons);
 
-	if (!ret) {
-		ret = cons->add_producer(cons, prod);
-		if (ret && prod->del_consumer)
-			prod->del_consumer(prod, cons);
-	}
+	if (ret)
+		goto err_add_consumer;
+
+	ret = cons->add_producer(cons, prod);
+	if (ret)
+		goto err_add_producer;
 
 	if (cons->start)
 		cons->start(cons);
 	if (prod->start)
 		prod->start(prod);
-
+err_add_producer:
+	if (prod->del_consumer)
+		prod->del_consumer(prod, cons);
+err_add_consumer:
 	return ret;
 }
 
-- 
1.8.3.1