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virtio-mem: don't read big block size in Sub Block Mode
[ Upstream commit 500817b ] We are reading a Big Block Mode value while in Sub Block Mode when initializing. Fortunately, vm->bbm.bb_size maps to some counter in the vm->sbm.mb_count array, which is 0 at that point in time. No harm done; still, this was unintended and is not future-proof. Fixes: 4ba50cd ("virtio-mem: Big Block Mode (BBM) memory hotplug") Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20210602185720.31821-2-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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