Subject: Re: [PATCH v2 11/11] Remove devres from pci_intx()

From: Thomas Gleixner <[email-masked]>
Date: Wed, 13 Nov 2024 17:22:45 +0100

On Wed, Nov 13 2024 at 13:41, Philipp Stanner wrote:
> pci_intx() is a hybrid function which can sometimes be managed through
> devres. This hybrid nature is undesirable.
>
> Since all users of pci_intx() have by now been ported either to
> always-managed pcim_intx() or never-managed pci_intx_unmanaged(), the
> devres functionality can be removed from pci_intx().
>
> Consequently, pci_intx_unmanaged() is now redundant, because pci_intx()
> itself is now unmanaged.
>
> Remove the devres functionality from pci_intx(). Have all users of
> pci_intx_unmanaged() call pci_intx(). Remove pci_intx_unmanaged().
>
> Signed-off-by: Philipp Stanner <[email-masked]>
> ---
>  drivers/misc/cardreader/rtsx_pcr.c            |  2 +-
>  drivers/misc/tifm_7xx1.c                      |  6 +--
>  .../net/ethernet/broadcom/bnx2x/bnx2x_main.c  |  2 +-
>  drivers/net/ethernet/brocade/bna/bnad.c       |  2 +-
>  drivers/ntb/hw/amd/ntb_hw_amd.c               |  4 +-
>  drivers/ntb/hw/intel/ntb_hw_gen1.c            |  2 +-
>  drivers/pci/devres.c                          |  4 +-
>  drivers/pci/msi/api.c                         |  2 +-
>  drivers/pci/msi/msi.c                         |  2 +-
>  drivers/pci/pci.c                             | 43 +------------------
>  drivers/vfio/pci/vfio_pci_core.c              |  2 +-
>  drivers/vfio/pci/vfio_pci_intrs.c             | 10 ++---
>  drivers/xen/xen-pciback/conf_space_header.c   |  2 +-
>  include/linux/pci.h                           |  1 -
>  14 files changed, 22 insertions(+), 62 deletions(-)

Now I'm utterly confused. This undoes the pci_intx_unmanaged() churn
which you carefully split into several patches first.

So the net change is that:

   1) pci_intx() is now always unmanaged

   2) a couple of drivers use pcim_intx() now instead of pci_intx()

The obvious ordering is:

   1) Convert the drivers which need the managed version to use
      pcim_intx()

   2) Remove the managed warning in pci_intx() and clean up the comment

   3) Remove __pcim_intx() and invoke pci_intx() in the devres code.

No?

Thanks,

        tglx