KVM Archive on lore.kernel.org
 help / color / Atom feed
From: Zhu Lingshan <lingshan.zhu@intel.com>
To: jasowang@redhat.com, alex.williamson@redhat.com, mst@redhat.com,
	pbonzini@redhat.com, sean.j.christopherson@intel.com,
	wanpengli@tencent.com
Cc: virtualization@lists.linux-foundation.org,
	netdev@vger.kernel.org, kvm@vger.kernel.org, eli@mellanox.com,
	shahafs@mellanox.com, parav@mellanox.com,
	Zhu Lingshan <lingshan.zhu@intel.com>
Subject: [PATCH V4 6/6] irqbypass: do not start cons/prod when failed connect
Date: Tue, 28 Jul 2020 12:24:05 +0800
Message-ID: <20200728042405.17579-7-lingshan.zhu@intel.com> (raw)
In-Reply-To: <20200728042405.17579-1-lingshan.zhu@intel.com>

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

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Suggested-by: Jason Wang <jasowang@redhat.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 28fda42e471b..c9bb3957f58a 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;
 }
 
-- 
2.18.4


  parent reply index

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-28  4:23 [PATCH V4 0/6] IRQ offloading for vDPA Zhu Lingshan
2020-07-28  4:24 ` [PATCH V4 1/6] vhost: introduce vhost_vring_call Zhu Lingshan
2020-07-28  4:24 ` [PATCH V4 2/6] kvm: detect assigned device via irqbypass manager Zhu Lingshan
2020-07-28  4:24 ` [PATCH V4 3/6] vDPA: add get_vq_irq() in vdpa_config_ops Zhu Lingshan
2020-07-28  7:42   ` Jason Wang
2020-07-28  4:24 ` [PATCH V4 4/6] vhost_vdpa: implement IRQ offloading in vhost_vdpa Zhu Lingshan
2020-07-28  7:53   ` Jason Wang
     [not found]     ` <f3e375da-3aa8-7a0c-237c-25943667a535@intel.com>
2020-07-28 10:29       ` Jason Wang
2020-07-28  9:04   ` Eli Cohen
2020-07-29  9:21     ` Jason Wang
2020-07-29  9:55       ` Eli Cohen
2020-07-29 10:19         ` Jason Wang
2020-07-29 11:13           ` Eli Cohen
2020-07-29 14:15           ` Eli Cohen
2020-07-31  3:11             ` Jason Wang
2020-07-28  4:24 ` [PATCH V4 5/6] ifcvf: implement vdpa_config_ops.get_vq_irq() Zhu Lingshan
2020-07-28  4:24 ` Zhu Lingshan [this message]
2020-07-31  3:18 ` [PATCH V4 0/6] IRQ offloading for vDPA Jason Wang

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200728042405.17579-7-lingshan.zhu@intel.com \
    --to=lingshan.zhu@intel.com \
    --cc=alex.williamson@redhat.com \
    --cc=eli@mellanox.com \
    --cc=jasowang@redhat.com \
    --cc=kvm@vger.kernel.org \
    --cc=mst@redhat.com \
    --cc=netdev@vger.kernel.org \
    --cc=parav@mellanox.com \
    --cc=pbonzini@redhat.com \
    --cc=sean.j.christopherson@intel.com \
    --cc=shahafs@mellanox.com \
    --cc=virtualization@lists.linux-foundation.org \
    --cc=wanpengli@tencent.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

KVM Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/kvm/0 kvm/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 kvm kvm/ https://lore.kernel.org/kvm \
		kvm@vger.kernel.org
	public-inbox-index kvm

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.kvm


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git