[PATCH] usb: dwc2: fix USB core dependencies

[Felipe Balbi]

Hi,

Adding John

On Wed, Jan 28, 2015 at 10:49:00PM +0100, Arnd Bergmann wrote:
> It is currently possible to configure the dwc2 driver as built-in
> when host mode or dual-role is enabled, but the USB core is
> a loadable module. This leads to a link failure:
> 
> drivers/built-in.o: In function `_dwc2_hcd_start':
> :(.text+0x84538): undefined reference to `usb_hcd_resume_root_hub'
> drivers/built-in.o: In function `_dwc2_hcd_urb_dequeue':
> :(.text+0x84aa0): undefined reference to `usb_hcd_check_unlink_urb'
> :(.text+0x84e4c): undefined reference to `usb_hcd_unlink_urb_from_ep'
> :(.text+0x84e74): undefined reference to `usb_hcd_giveback_urb'
> drivers/built-in.o: In function `dwc2_assign_and_init_hc':
> :(.text+0x86b98): undefined reference to `usb_hcd_unmap_urb_for_dma'
> drivers/built-in.o: In function `_dwc2_hcd_urb_enqueue':
> :(.text+0x8717c): undefined reference to `usb_hcd_link_urb_to_ep'
> :(.text+0x872f4): undefined reference to `usb_hcd_unlink_urb_from_ep'
> drivers/built-in.o: In function `dwc2_host_complete':
> :(.text+0x875d4): undefined reference to `usb_hcd_unlink_urb_from_ep'
> :(.text+0x87600): undefined reference to `usb_hcd_giveback_urb'
> drivers/built-in.o: In function `dwc2_hcd_init':
> :(.text+0x87ba8): undefined reference to `usb_disabled'
> :(.text+0x87d38): undefined reference to `usb_create_hcd'
> :(.text+0x88094): undefined reference to `usb_add_hcd'
> :(.text+0x880dc): undefined reference to `usb_put_hcd'
> drivers/built-in.o: In function `dwc2_hcd_remove':
> :(.text+0x8821c): undefined reference to `usb_remove_hcd'
> :(.text+0x8823c): undefined reference to `usb_put_hcd'
> drivers/built-in.o: In function `dwc2_hc_handle_tt_clear.isra.10':
> :(.text+0x88e2c): undefined reference to `usb_hub_clear_tt_buffer'
> drivers/built-in.o: In function `dwc2_hcd_qtd_add':
> :(.text+0x8b554): undefined reference to `usb_calc_bus_time'
> 
> To fix the problem, this patch changes the dependencies so that
> dwc2 host mode can only be enabled if either the USB core is
> built-in or both USB and dwc2 are modules.
> 
> Signed-off-by: Arnd Bergmann <arnd at arndb.de>
> 
> diff --git a/drivers/usb/dwc2/Kconfig b/drivers/usb/dwc2/Kconfig
> index b323c4c11b0a..76b9ba4dc925 100644
> --- a/drivers/usb/dwc2/Kconfig
> +++ b/drivers/usb/dwc2/Kconfig
> @@ -23,7 +23,7 @@ choice
>  
>  config USB_DWC2_HOST
>  	bool "Host only mode"
> -	depends on USB
> +	depends on USB=y || (USB_DWC2=m && USB)
>  	help
>  	  The Designware USB2.0 high-speed host controller
>  	  integrated into many SoCs. Select this option if you want the
> @@ -42,7 +42,7 @@ config USB_DWC2_PERIPHERAL
>  
>  config USB_DWC2_DUAL_ROLE
>  	bool "Dual Role mode"
> -	depends on (USB=y || USB=USB_DWC2) && (USB_GADGET=y || USB_GADGET=USB_DWC2)
> +	depends on (USB=y && USB_GADGET=y) || (USB_DWC2=m && USB && USB_GADGET)
>  	help
>  	  Select this option if you want the driver to work in a dual-role
>  	  mode. In this mode both host and gadget features are enabled, and
> 
> 
> _______________________________________________
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> linux-arm-kernel at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

-- 
balbi
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