PCI_LOONGSON is a mandatory for LoongArch and it is selected in Kconfig
unconditionally, but its dependency PCI_QUIRKS is missing and may cause
a build error when "make randconfig":

   arch/loongarch/pci/acpi.c: In function 'pci_acpi_setup_ecam_mapping':
>> arch/loongarch/pci/acpi.c:103:29: error: 'loongson_pci_ecam_ops' undeclared (first use in this function)
     103 |                 ecam_ops = &loongson_pci_ecam_ops;
         |                             ^~~~~~~~~~~~~~~~~~~~~
   arch/loongarch/pci/acpi.c:103:29: note: each undeclared identifier is reported only once for each function it appears in

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for PCI_LOONGSON
   Depends on [n]: PCI [=y] && (MACH_LOONGSON64 [=y] || COMPILE_TEST [=y]) && (OF [=y] || ACPI [=y]) && PCI_QUIRKS [=n]
   Selected by [y]:
   - LOONGARCH [=y]

Fix it by selecting PCI_QUIRKS unconditionally, too.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
---
 arch/loongarch/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
index 4abc9a28aba4..26aeb1408e56 100644
--- a/arch/loongarch/Kconfig
+++ b/arch/loongarch/Kconfig
@@ -111,6 +111,7 @@ config LOONGARCH
 	select PCI_ECAM if ACPI
 	select PCI_LOONGSON
 	select PCI_MSI_ARCH_FALLBACKS
+	select PCI_QUIRKS
 	select PERF_USE_VMALLOC
 	select RTC_LIB
 	select SMP
-- 
2.31.1

On 8/19/22 19:57, Huacai Chen wrote:
> PCI_LOONGSON is a mandatory for LoongArch and it is selected in Kconfig
> unconditionally, but its dependency PCI_QUIRKS is missing and may cause
> a build error when "make randconfig":
> 
>    arch/loongarch/pci/acpi.c: In function 'pci_acpi_setup_ecam_mapping':
>>> arch/loongarch/pci/acpi.c:103:29: error: 'loongson_pci_ecam_ops' undeclared (first use in this function)
>      103 |                 ecam_ops = &loongson_pci_ecam_ops;
>          |                             ^~~~~~~~~~~~~~~~~~~~~
>    arch/loongarch/pci/acpi.c:103:29: note: each undeclared identifier is reported only once for each function it appears in
> 
> Kconfig warnings: (for reference only)
>    WARNING: unmet direct dependencies detected for PCI_LOONGSON
>    Depends on [n]: PCI [=y] && (MACH_LOONGSON64 [=y] || COMPILE_TEST [=y]) && (OF [=y] || ACPI [=y]) && PCI_QUIRKS [=n]
>    Selected by [y]:
>    - LOONGARCH [=y]
> 
> Fix it by selecting PCI_QUIRKS unconditionally, too.
> 
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

Tested-by: Randy Dunlap <rdunlap@infradead.org> # build-tested

Thanks.

> ---
>  arch/loongarch/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
> index 4abc9a28aba4..26aeb1408e56 100644
> --- a/arch/loongarch/Kconfig
> +++ b/arch/loongarch/Kconfig
> @@ -111,6 +111,7 @@ config LOONGARCH
>  	select PCI_ECAM if ACPI
>  	select PCI_LOONGSON
>  	select PCI_MSI_ARCH_FALLBACKS
> +	select PCI_QUIRKS
>  	select PERF_USE_VMALLOC
>  	select RTC_LIB
>  	select SMP

-- 
~Randy