On Tue, Jul 15, 2025 at 09:44:56PM +0000, Eric Biggers wrote: > However, it needs to be done safely. That means at least making > blk_crypto_config_supported() continue to return false when called on a > block_device that doesn't support any form of blk-crypto (either native > or fallback), and likewise making blk_crypto_start_using_key() continue > to return an error. Ideally, the actual I/O would also continue to fail > if it's attempted anyway. Yes, both are absolutely required.