linux-kernel - Re: [PATCH v8 1/8] tpm: tpm_tis: Make implementation of read16, read32 and write32 optional

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Date:   Fri, 15 May 2020 02:32:12 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     amirmizi6@...il.com, Eyal.Cohen@...oton.com,
        oshrialkoby85@...il.com, alexander.steffen@...ineon.com,
        robh+dt@...nel.org, benoit.houyere@...com, mark.rutland@....com,
        peterhuewe@....de, christophe-h.richard@...com, jgg@...pe.ca,
        arnd@...db.de, gregkh@...uxfoundation.org
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-integrity@...r.kernel.org, oshri.alkoby@...oton.com,
        tmaimon77@...il.com, gcwilson@...ibm.com, kgoldman@...ibm.com,
        Dan.Morav@...oton.com, oren.tanami@...oton.com,
        shmulik.hager@...oton.com, amir.mizinski@...oton.com
Subject: Re: [PATCH v8 1/8] tpm: tpm_tis: Make implementation of read16,
 read32 and write32 optional

On Thu, 2020-05-14 at 14:26 +0300, Jarkko Sakkinen wrote:
> On Tue, 2020-05-12 at 17:14 +0300, amirmizi6@...il.com wrote:
> > From: Amir Mizinski <amirmizi6@...il.com>
> > 
> > Only tpm_tis can use memory-mapped I/O, which is truly mapped into
> > the kernel's memory space. Therefore, using ioread16/ioread32/iowrite32
> > turns into a straightforward pointer dereference.
> > Every other driver requires more complicated operations to read more than
> > one byte at a time and will just fall back to read_bytes/write_bytes.
> > Therefore, move this common code out of tpm_tis_spi and into tpm_tis_core
> > so that it is used automatically when low-level drivers do not implement
> > the specialized methods.
> > 
> > Co-developed-by: Alexander Steffen <Alexander.Steffen@...ineon.com>
> > Signed-off-by: Alexander Steffen <Alexander.Steffen@...ineon.com>
> > Signed-off-by: Amir Mizinski <amirmizi6@...il.com>
> > Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> 
> OK, so I applied this one:
> 
> http://git.infradead.org/users/jjs/linux-tpmdd.git/commit/fa05dc792ea02043f3c21467cb4485a38ac19bdf
> 
> I.e. no need to carry this one any more in the series. Sorry that
> I haven't done this before (should have).

Dropped it. Breaks the compilation:

ld: drivers/char/tpm/tpm_tis_spi_cr50.o:(.rodata+0x10): undefined reference to `tpm_tis_spi_read16'
ld: drivers/char/tpm/tpm_tis_spi_cr50.o:(.rodata+0x18): undefined reference to `tpm_tis_spi_read32'
ld: drivers/char/tpm/tpm_tis_spi_cr50.o:(.rodata+0x20): undefined reference to `tpm_tis_spi_write32'

Please fix this issue in the next version of the patch and remove my
reviewed-by. I will have to re-review the patch.

/Jarkko