linux-kernel - Re: [PATCH 0/5] Fix whole native SPI TPM driver

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Message-ID: <20170222211924.zdikc5qfzuxiggte@intel.com>
Date:   Wed, 22 Feb 2017 23:19:24 +0200
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Peter Huewe <peter.huewe@...ineon.com>
Cc:     Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
        tpmdd-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
        peterhuewe@....de, Christophe Ricard <christophe-h.ricard@...com>
Subject: Re: [PATCH 0/5] Fix whole native SPI TPM driver

On Thu, Feb 16, 2017 at 04:08:21PM +0000, Peter Huewe wrote:
> During our testing it showed that unfortunately the whole native spi tpm driver
> was more or less non-functional since it was merged, e.g. the wrong byte for
> waitstate handling was used and transfers larger than 64 bytes did not work at all.
> 
> This was probably caused by the merging of the different approaches back then,
> as the initial RFC patch did not have these problems, and also my sudden lack
> of time/commitment back then.
> I'm sorry that the final driver code went untested for that long time.
> 
> This patch set fixes these issues one by one.
> In order to avoid duplication the read/write function was consolidated to one
> transfer function, so we do not have to apply the same fix at two locations.
> Maybe consider squashing it - we splitted it for easier review.
>  
> Affected Kernels: 4.8, 4.9, 4.10
> Patchset was tested on Raspberry Pi2 with SLB9670 (TPM1.2 and TPM2.0)
> 
> Peter Huewe (5):
>   tpm_tis_spi: Use single function to transfer data
>   tpm_tis_spi: Abort transfer when too many wait states are signaled
>   tpm_tis_spi: Check correct byte for wait state indicator
>   tpm_tis_spi: Remove limitation of transfers to MAX_SPI_FRAMESIZE bytes
>   tpm_tis_spi: Add small delay after last transfer
> 
>  drivers/char/tpm/tpm_tis_spi.c | 163 +++++++++++++++++------------------------
>  1 file changed, 69 insertions(+), 94 deletions(-)
> 
> -- 
> 2.7.4
> 

I also found type errors a whilea ago:

https://patchwork.kernel.org/patch/9547993/

Do this take care of these issues? 

/JArkko