Re: [PATCH] tpm_tis: work around status register bug in STMicroelectronics TPM

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On Wed, Apr 15, 2020 at 03:45:22PM -0700, Omar Sandoval wrote:
> From: Omar Sandoval <osandov@xxxxxx>
> 
> We've encountered a particular model of STMicroelectronics TPM that
> transiently returns a bad value in the status register. This causes the
> kernel to believe that the TPM is ready to receive a command when it
> actually isn't, which in turn causes the send to time out in
> get_burstcount(). In testing, reading the status register one extra time
> convinces the TPM to return a valid value.
> 
> Signed-off-by: Omar Sandoval <osandov@xxxxxx>

So what is the bad value?

/Jarkko



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