[PATCH v3 3/5] tpm: migrate tpm2_probe() to use struct tpm_buf

[Mimi Zohar]

On Fri, 2018-03-16 at 14:21 +0200, Jarkko Sakkinen wrote:
> On Mon, Mar 05, 2018 at 05:52:24PM -0500, Mimi Zohar wrote:
> > Hi Jarrko,
> > 
> > On Mon, 2018-03-05 at 18:56 +0200, Jarkko Sakkinen wrote:
> > > In order to make struct tpm_buf the first class object for constructing TPM
> > > commands, migrate tpm2_probe() to use it.
> > > 
> > > Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen at linux.intel.com>
> > 
> > With this patch, the Pi doesn't find the TPM.  I'm seeing the
> > following line in dmesg.
> > 
> > [    1.087414] tpm_tis_spi: probe of spi0.0 failed with error 256
> 
> Thank you for reporting this Mimi. Does it have TPM1/TPM2?

The pi has a TPM 2.0 attached to the GPIO.  James pointed out the
change in return codes.


+       if (be16_to_cpu(out->tag) == TPM2_ST_NO_SESSIONS)
                chip->flags |= TPM_CHIP_FLAG_TPM2;
-
-       return 0;
+out:
+       tpm_buf_destroy(&buf);
+       return rc;
 }
 EXPORT_SYMBOL_GPL(tpm2_probe);

Mimi

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