Re: [PATCH v8 17/18] drm/virtio: kconfig: Fix recursive dependency.

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On Fri, 26 Aug 2016, Peter Griffin wrote:

> [..]
> drivers/video/fbdev/Kconfig:5:error: recursive dependency detected!
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/video/fbdev/Kconfig:5:	symbol FB is selected by DRM_KMS_FB_HELPER
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/gpu/drm/Kconfig:42:	symbol DRM_KMS_FB_HELPER depends on DRM_KMS_HELPER
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/gpu/drm/Kconfig:36:	symbol DRM_KMS_HELPER is selected by DRM_VIRTIO_GPU
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/gpu/drm/virtio/Kconfig:1:	symbol DRM_VIRTIO_GPU depends on VIRTIO
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/virtio/Kconfig:1:	symbol VIRTIO is selected by REMOTEPROC
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/remoteproc/Kconfig:4:	symbol REMOTEPROC is selected by ST_SLIM_REMOTEPROC
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/remoteproc/Kconfig:103:	symbol ST_SLIM_REMOTEPROC is selected by ST_FDMA
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/dma/Kconfig:440:	symbol ST_FDMA depends on DMADEVICES
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/dma/Kconfig:5:	symbol DMADEVICES is selected by SND_SOC_SH4_SIU
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> sound/soc/sh/Kconfig:29:	symbol SND_SOC_SH4_SIU is selected by SND_SIU_MIGOR
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> sound/soc/sh/Kconfig:64:	symbol SND_SIU_MIGOR depends on I2C
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/i2c/Kconfig:7:	symbol I2C is selected by FB_DDC
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/video/fbdev/Kconfig:63:	symbol FB_DDC is selected by FB_CYBER2000_DDC
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/video/fbdev/Kconfig:378:	symbol FB_CYBER2000_DDC depends on FB_CYBER2000
> For a resolution refer to Documentation/kbuild/kconfig-language.txt
> subsection "Kconfig recursive dependency limitations"
> drivers/video/fbdev/Kconfig:366:	symbol FB_CYBER2000 depends on FB

An explanation of why this is happening and why your fix works is
usually helpful here.

> Signed-off-by: Peter Griffin <peter.griffin@xxxxxxxxxx>
> ---
>  drivers/gpu/drm/virtio/Kconfig | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/virtio/Kconfig b/drivers/gpu/drm/virtio/Kconfig
> index e1afc3d..90357d9 100644
> --- a/drivers/gpu/drm/virtio/Kconfig
> +++ b/drivers/gpu/drm/virtio/Kconfig
> @@ -1,6 +1,7 @@
>  config DRM_VIRTIO_GPU
>  	tristate "Virtio GPU driver"
> -	depends on DRM && VIRTIO
> +	depends on DRM
> +	select VIRTIO
>          select DRM_KMS_HELPER
>          select DRM_TTM
>  	help

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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