On Sun, Aug 18, 2013 at 10:20:44PM +0200, Geert Uytterhoeven wrote:
> If NO_DMA=y:
> 
> drivers/built-in.o: In function `dma_set_coherent_mask':
> include/linux/dma-mapping.h:93: undefined reference to `dma_supported'
> 
> Signed-off-by: Geert Uytterhoeven <ge...@linux-m68k.org>
> ---
>  drivers/usb/chipidea/Kconfig |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/chipidea/Kconfig b/drivers/usb/chipidea/Kconfig
> index d1bd8ef..dbd5232 100644
> --- a/drivers/usb/chipidea/Kconfig
> +++ b/drivers/usb/chipidea/Kconfig
> @@ -1,6 +1,6 @@
>  config USB_CHIPIDEA
>       tristate "ChipIdea Highspeed Dual Role Controller"
> -     depends on USB || USB_GADGET
> +     depends on (USB || USB_GADGET) && HAS_DMA
>       help
>         Say Y here if your system has a dual role high speed USB
>         controller based on ChipIdea silicon IP. Currently, only the

I can't understand why the DMA can't be changed to fix this instead
of changing every driver?

-- 

Best Regards,
Peter Chen

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