Re: TPM operation times out (very rarely)

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On Mon Feb 10, 2025 at 6:18 PM EET, Jonathan McDowell wrote:
> Who then handles the ERESTARTSYS though? Part of the issues we've seen
> is the failure happens in a context save or load, which is all within
> the kernel rather than directly under the control of userspace. I'm
> guessing the HMAC changes are likely to hit similar problems. I think
> some level of timeout improvement in tpm_transmit is appropriate, if we
> can work out what it should be.

Right I get what you mean, not all transmits initiate from syscalls
And obviously this can happen without hmac too with tpmrm0.

Hmm... so I'm open for a patch that radically simplifies the state
change timeouts, i.e. sort of part of that old patch.

BR, Jarkko





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