Re: [PATCH v19 2/5] tpm: tpm_tis: Rewrite "tpm_tis_req_canceled()"

[Jarkko Sakkinen]

On Thu, 2021-11-04 at 16:02 +0200, amirmizi6@xxxxxxxxx wrote:
> From: Amir Mizinski <amirmizi6@xxxxxxxxx>
> 
> tpm_tis_req_canceled() function is used to check if the caller requested
> to abort the current operation. It was found that in some cases
> tpm_tis_req_canceled() wrongly returned true.

Please, bring some context, i.e. please describe the scenarios.

> Since a cancel request sets the TPM_STS.commandReady field to TRUE, the 
          ~~~~~~~~~~~~~~

What the heck is this? Please refer the exact things.


> tpm_tis_req_canceled() function should check only the TPM_STS.commandReady
> field value.

Why?

> The case for TPM_VID_WINBOND is wrong and was therefore removed.

Why?

It is not removed in the existing mainline, so it definitely *was not*
removed.

> Also, the default comparison is wrong. Only cmdReady bit needs to be
> compared instead of the full lower status register byte.

You should split this into two patches, if it fixes two different
issues.

/Jarkko