On Wed, Jul 20, 2016 at 03:16:32AM +0300, Jarkko Sakkinen wrote: > Unseal and load operations should be done as an atomic unit. This > commit fixes the issue by moving TPM mutex handling to tpm_try_get_ops() > and tpm_put_ops(), which is probably more logical place for it anyway.
No.. 'get_ops' is to be used to hold a persisent kref to a single tpm. It cannot block other tpm access. Eg a upper protocol might get_ops to for a long period to ensure it consistently talks to the same TPM in a multi-tpm system. We need something else to solve whatever you are concerned with here.. Jason