[PATCH v3] tpm: Relocate buf->handles to appropriate place

[James Bottomley]

On Tue, 2024-07-16 at 21:52 +0300, Jarkko Sakkinen wrote:
[...]
> Further, 'handles' was incorrectly place to struct tpm_buf, as tpm-
> buf.c does manage its state. It is easy to grep that only piece of
> code that actually uses the field is tpm2-sessions.c.
> 
> Address the issues by moving the variable to struct tpm_chip.

That's really not a good idea, you should keep counts local to the
structures they're counting, not elsewhere.

tpm_buf->handles counts the number of handles present in the command
encoded in a particular tpm_buf.  Right at the moment we only ever
construct one tpm_buf per tpm (i.e. per tpm_chip) at any one time, so
you can get away with moving handles into tpm_chip.  If we ever
constructed more than one tpm_buf per chip, the handles count would
become corrupted.

James