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vhost-vdpa: initialize state before publishing cdev

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Initialize the completion and as hash buckets before cdev_device_add()
makes the device accessible.

Fixes: 4c8cf31885 ("vhost: introduce vDPA-based backend")
Assisted-by: OpenAI-Codex:GPT-5.6
Signed-off-by: Linfeng Sun <linfeng.sun.dev@gmail.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <20261011-fix-null-pointer-in-vhost_vdpa_release-v2-1-66ba929971ce@gmail.com>
This commit is contained in:
Linfeng Sun 2026-10-11 18:28:24 +08:00 committed by Michael S. Tsirkin
parent 509f6bd229
commit 4b03d1e7f1
1 changed files with 5 additions and 4 deletions
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9
drivers/vhost/vdpa.c
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@ -1699,7 +1699,7 @@ static int vhost_vdpa_probe(struct vdpa_device *vdpa)
return minor;
}
atomic_set(&v->opened, 0);
atomic_set(&v->opened, 1);
spin_lock_init(&v->config_lock);
v->minor = minor;
v->vdpa = vdpa;
@ -1722,16 +1722,17 @@ static int vhost_vdpa_probe(struct vdpa_device *vdpa)
cdev_init(&v->cdev, &vhost_vdpa_fops);
v->cdev.owner = THIS_MODULE;
init_completion(&v->completion);
for (i = 0; i < VHOST_VDPA_IOTLB_BUCKETS; i++)
INIT_HLIST_HEAD(&v->as[i]);
r = cdev_device_add(&v->cdev, &v->dev);
if (r)
goto err;
init_completion(&v->completion);
vdpa_set_drvdata(vdpa, v);
for (i = 0; i < VHOST_VDPA_IOTLB_BUCKETS; i++)
INIT_HLIST_HEAD(&v->as[i]);
atomic_set_release(&v->opened, 0);
return 0;