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Re: [PATCH 4.17 2/2] ssb: make SSB_PCICORE_HOSTMODE depend on SSB = y

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On Thu, 10 May 2018 13:20:01 +0200
Rafał Miłecki <zajec5@xxxxxxxxx> wrote:

> On 10 May 2018 at 13:17, Michael Büsch <m@xxxxxxx> wrote:
> > On Thu, 10 May 2018 13:14:01 +0200
> > Rafał Miłecki <zajec5@xxxxxxxxx> wrote:
> >  
> >> From: Rafał Miłecki <rafal@xxxxxxxxxx>
> >>
> >> SSB_PCICORE_HOSTMODE protects MIPS specific code that calls not exported
> >> symbols pcibios_enable_device and register_pci_controller. This code is
> >> supposed to be compiled only with ssb builtin.
> >>
> >> This fixes:
> >> ERROR: "pcibios_enable_device" [drivers/ssb/ssb.ko] undefined!
> >> ERROR: "register_pci_controller" [drivers/ssb/ssb.ko] undefined!
> >> make[1]: *** [scripts/Makefile.modpost:92: __modpost] Error 1
> >>
> >> Signed-off-by: Rafał Miłecki <rafal@xxxxxxxxxx>
> >> ---
> >>  drivers/ssb/Kconfig | 2 +-
> >>  1 file changed, 1 insertion(+), 1 deletion(-)
> >>
> >> diff --git a/drivers/ssb/Kconfig b/drivers/ssb/Kconfig
> >> index b3f5cae98ea6..c574dd210500 100644
> >> --- a/drivers/ssb/Kconfig
> >> +++ b/drivers/ssb/Kconfig
> >> @@ -131,7 +131,7 @@ config SSB_DRIVER_PCICORE
> >>
> >>  config SSB_PCICORE_HOSTMODE
> >>       bool "Hostmode support for SSB PCI core"
> >> -     depends on SSB_DRIVER_PCICORE && SSB_DRIVER_MIPS
> >> +     depends on SSB_DRIVER_PCICORE && SSB_DRIVER_MIPS && SSB = y
> >>       help
> >>         PCIcore hostmode operation (external PCI bus).
> >>  
> >
> >
> > I think we also need to depend on PCI_DRIVERS_LEGACY.
> > See the other patch that floats around.  
> 
> I believe it's already handled by SSB_PCIHOST_POSSIBLE's dependency on
> PCI_DRIVERS_LEGACY.


That dependency seems to be wrong there.
Was it added among some other "let's just unbreak some random
build" change as well?

SSB_PCIHOST enables support for SSB on top of PCI. (Which is 99% of it
uses). I don't see how this uses the legacy API.

SSB_PCICORE_HOSTMODE enables PCI on top of SSB. Which is a MIPS corner
case. This uses the legacy MIPS API to register a PCI bus.

-- 
Michael

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