Re: [PATCH 3/3] drm/panthor: Fix undefined panthor_device_suspend/resume symbol issue

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On Mon, 11 Mar 2024 13:05:01 +0200
Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx> wrote:

> This breaks the config for me:
> 
>   SYNC    include/config/auto.conf.cmd
>   GEN     Makefile
> drivers/iommu/Kconfig:14:error: recursive dependency detected!
> drivers/iommu/Kconfig:14:	symbol IOMMU_SUPPORT is selected by DRM_PANTHOR
> drivers/gpu/drm/panthor/Kconfig:3:	symbol DRM_PANTHOR depends on PM
> kernel/power/Kconfig:183:	symbol PM is selected by PM_SLEEP
> kernel/power/Kconfig:117:	symbol PM_SLEEP depends on HIBERNATE_CALLBACKS
> kernel/power/Kconfig:35:	symbol HIBERNATE_CALLBACKS is selected by XEN_SAVE_RESTORE
> arch/x86/xen/Kconfig:67:	symbol XEN_SAVE_RESTORE depends on XEN
> arch/x86/xen/Kconfig:6:	symbol XEN depends on PARAVIRT
> arch/x86/Kconfig:781:	symbol PARAVIRT is selected by HYPERV
> drivers/hv/Kconfig:5:	symbol HYPERV depends on X86_LOCAL_APIC
> arch/x86/Kconfig:1106:	symbol X86_LOCAL_APIC depends on X86_UP_APIC
> arch/x86/Kconfig:1081:	symbol X86_UP_APIC prompt is visible depending on PCI_MSI
> drivers/pci/Kconfig:39:	symbol PCI_MSI is selected by AMD_IOMMU
> drivers/iommu/amd/Kconfig:3:	symbol AMD_IOMMU depends on IOMMU_SUPPORT

Uh, I guess we want a "depends on IOMMU_SUPPORT" instead of "select
IOMMU_SUPPORT" in panthor then.

> For a resolution refer to Documentation/kbuild/kconfig-language.rst
> subsection "Kconfig recursive dependency limitations"



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