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virtio: release virtio index when fail to device_register

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index can be reused by other virtio device.

Cc: [email protected]
Signed-off-by: weiping zhang <[email protected]>
Reviewed-by: Cornelia Huck <[email protected]>
Signed-off-by: Michael S. Tsirkin <[email protected]>
This commit is contained in:
weiping zhang 2017-11-29 09:23:01 +08:00 • committed by Michael S. Tsirkin
commit e60ea67bb6
1 changed files with 2 additions and 0 deletions
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2
drivers/virtio/virtio.c
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@ -333,6 +333,8 @@ int register_virtio_device(struct virtio_device *dev)
/* device_register() causes the bus infrastructure to look for a
* matching driver. */
err = device_register(&dev->dev);
if (err)
ida_simple_remove(&virtio_index_ida, dev->index);
out:
if (err)
virtio_add_status(dev, VIRTIO_CONFIG_S_FAILED);