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From:   Michael Ellerman <mpe@ellerman.id.au>
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Subject: Re: [PATCH v2] vio: make remove callback return void
In-Reply-To: <20210224072516.74696-1-uwe@kleine-koenig.org>
References: <20210224072516.74696-1-uwe@kleine-koenig.org>
Date:   Thu, 25 Feb 2021 22:49:54 +1100
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Uwe Kleine-K=C3=B6nig <uwe@kleine-koenig.org> writes:
> The driver core ignores the return value of struct bus_type::remove()
> because there is only little that can be done. To simplify the quest to
> make this function return void, let struct vio_driver::remove() return
> void, too. All users already unconditionally return 0, this commit makes
> it obvious that returning an error code is a bad idea and makes it
> obvious for future driver authors that returning an error code isn't
> intended.
>
> Note there are two nominally different implementations for a vio bus:
> one in arch/sparc/kernel/vio.c and the other in
> arch/powerpc/platforms/pseries/vio.c. I didn't care to check which
> driver is using which of these busses (or if even some of them can be
> used with both) and simply adapt all drivers and the two bus codes in
> one go.

I'm 99% sure there's no connection between the two implementations,
other than the name.

So splitting the patch by arch would make it easier to merge. I'm
reluctant to merge changes to sparc code.

The list of powerpc specific drivers is:

  drivers/char/hw_random/pseries-rng.c
  drivers/char/tpm/tpm_ibmvtpm.c
  drivers/crypto/nx/nx-842-pseries.c
  drivers/crypto/nx/nx.c
  drivers/misc/ibmvmc.c
  drivers/net/ethernet/ibm/ibmveth.c
  drivers/net/ethernet/ibm/ibmvnic.c
  drivers/scsi/ibmvscsi/ibmvfc.c
  drivers/scsi/ibmvscsi/ibmvscsi.c
  drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
  drivers/tty/hvc/hvcs.c

cheers