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virtio-mem: convert most offline_and_remove_memory() errors to -EBUSY

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Just like we do with alloc_contig_range(), let's convert all unknown
errors to -EBUSY, but WARN so we can look into the issue. For example,
offline_pages() could fail with -EINTR, which would be unexpected in our
case.

Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20230713145551.2824980-3-david@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
David Hildenbrand 2023-07-13 16:55:49 +02:00 committed by Michael S. Tsirkin
parent f504e15b94
commit ddf4098514
1 changed files with 8 additions and 4 deletions
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12
drivers/virtio/virtio_mem.c
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@ -741,11 +741,15 @@ static int virtio_mem_offline_and_remove_memory(struct virtio_mem *vm,
* immediately instead of waiting.
*/
virtio_mem_retry(vm);
} else {
dev_dbg(&vm->vdev->dev,
"offlining and removing memory failed: %d\n", rc);
return 0;
}
return rc;
dev_dbg(&vm->vdev->dev, "offlining and removing memory failed: %d\n", rc);
/*
* We don't really expect this to fail, because we fake-offlined all
* memory already. But it could fail in corner cases.
*/
WARN_ON_ONCE(rc != -ENOMEM && rc != -EBUSY);
return rc == -ENOMEM ? -ENOMEM : -EBUSY;
}
/*