linux-kernel - Re: [PATCH 6/6] [RFC] usb: gadget: USB_GADGET should depend on HAS

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Date:	Fri, 12 Jul 2013 10:39:18 +0300
From:	Alexander Shishkin <alexander.shishkin@...ux.intel.com>
To:	Alan Stern <stern@...land.harvard.edu>,
	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Felipe Balbi <balbi@...com>, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/6] [RFC] usb: gadget: USB_GADGET should depend on HAS_DMA

Alan Stern <stern@...land.harvard.edu> writes:

> On Thu, 11 Jul 2013, 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'
>> include/linux/dma-mapping.h:93: undefined reference to `dma_supported'
>> drivers/built-in.o: In function `usb_gadget_unmap_request':
>> drivers/usb/gadget/udc-core.c:91: undefined reference to `dma_unmap_sg'
>> drivers/usb/gadget/udc-core.c:96: undefined reference to `dma_unmap_single'
>> drivers/built-in.o: In function `usb_gadget_map_request':
>> drivers/usb/gadget/udc-core.c:62: undefined reference to `dma_map_sg'
>> drivers/usb/gadget/udc-core.c:71: undefined reference to `dma_map_single'
>> drivers/usb/gadget/udc-core.c:74: undefined reference to `dma_mapping_error'
>> 
>> Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
>> ---
>> This one is very debatable: probably the parts using the DMA API should
>> be factored out, instead of disabling the whole USB gadget subsystem.
>
> Indeed.  How does this look instead?

This one is much better. FWIW,

Acked-by: Alexander Shishkin <alexander.shishkin@...ux.intel.com>

Regards,
--
Alex
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