linux-kernel - Re: [PATCH v2] scsi: advansys needs ISA dma api for ISA support

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Date:	Fri, 16 Oct 2015 14:16:06 +0200
From:	Hannes Reinecke <hare@...e.de>
To:	Arnd Bergmann <arnd@...db.de>, linux-scsi@...r.kernel.org,
	James Bottomley <James.Bottomley@...senpartnership.com>
CC:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] scsi: advansys needs ISA dma api for ISA support

On 10/16/2015 02:13 PM, Arnd Bergmann wrote:
> The advansys drvier uses the request_dma function that is used on ISA
> machines for the internal DMA controller, which causes build errors
> on platforms that have ISA slots but do not provide the ISA DMA API:
> 
> drivers/scsi/advansys.c: In function 'advansys_board_found':
> drivers/scsi/advansys.c:11300:10: error: implicit declaration of function 'request_dma' [-Werror=implicit-function-declaration]
> 
> The problem now showed up in ARM randconfig builds after commit
> 6571fb3f8b7f ("advansys: Update to version 3.5 and remove compilation
> warning") made it possible to build on platforms that have neither
> VIRT_TO_BUS nor ISA_DMA_API but that do have ISA.
> 
> This adds a dependency to only build the driver on ISA based machines
> if they also support ISA_DMA_API, or if they EISA or PCI are also
> enabled.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> 
Reviewed-by: Hannes Reinecke <hare@...e.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		               zSeries & Storage
hare@...e.de			               +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
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