linux-kernel - Re: [PATCH] VIDEO_SH_MOBILE_CEU should depend on HAS

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Date:	Wed, 27 Aug 2008 16:00:58 +0900
From:	Paul Mundt <lethal@...ux-sh.org>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Magnus Damm <magnus.damm@...il.com>,
	Mauro Carvalho Chehab <mchehab@...radead.org>,
	video4linux-list@...hat.com,
	Linux Kernel Development <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] VIDEO_SH_MOBILE_CEU should depend on HAS_DMA (was: Re: m68k allmodconfig)

On Tue, Aug 26, 2008 at 09:37:21PM +0200, Geert Uytterhoeven wrote:
> 	Hi Andrew,
> 
> On Thu, 14 Aug 2008, Andrew Morton wrote:
> > ERROR: "dma_alloc_coherent" [drivers/media/video/videobuf-dma-contig.ko] undefined!
> > ERROR: "dma_sync_single_for_cpu" [drivers/media/video/videobuf-dma-contig.ko] undefined!
> > ERROR: "dma_free_coherent" [drivers/media/video/videobuf-dma-contig.ko] undefined!
> 
> M68k allmodconfig still selects Sun-3, which sets NO_DMA.
> I guess you're also seeing this on the other NO_DMA platforms (h8300, m32r,
> s390, and PCI-less SPARC)?
> 
> Below is a patch.
> 
> Shouldn't it also (or instead) depend on SUPERH or some SuperH platform?
> Or is this not done to have more compile-coverage?
> 
The SUPERH dependency was there initially, but was dropped for increased
compilation coverage. The HAS_DMA dependence is certainly the right thing
to do here.

> Subject: [PATCH] VIDEO_SH_MOBILE_CEU should depend on HAS_DMA
> 
> commit 0d3244d6439c8c31d2a29efd587c7aca9042c8aa ("V4L/DVB (8342):
> sh_mobile_ceu_camera: Add SuperH Mobile CEU driver V3") introduced
> VIDEO_SH_MOBILE_CEU, which selects VIDEOBUF_DMA_CONTIG. This circumvents the
> dependency on HAS_DMA of VIDEOBUF_DMA_CONTIG.
> 
> Add a dependency on HAS_DMA to VIDEO_SH_MOBILE_CEU to fix this.
> 
> Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>

Acked-by: Paul Mundt <lethal@...ux-sh.org>
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