linux-kernel - Re: [PATCH V2 1/3] scsi: mptxsas: try 64 bit DMA when 32 bit DMA fails

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Date:	Mon, 9 Nov 2015 17:29:41 -0600
From:	Timur Tabi <timur@...eaurora.org>
To:	Sinan Kaya <okaya@...eaurora.org>, Arnd Bergmann <arnd@...db.de>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Hannes Reinecke <hare@...e.de>, linux-scsi@...r.kernel.org,
	cov@...eaurora.org, jcm@...hat.com,
	Abhijit Mahajan <abhijit.mahajan@...gotech.com>,
	Nagalakshmi Nandigama <nagalakshmi.nandigama@...gotech.com>,
	linux-arm-msm@...r.kernel.org,
	"James E.J. Bottomley" <JBottomley@...n.com>,
	linux-kernel@...r.kernel.org,
	Sreekanth Reddy <sreekanth.reddy@...gotech.com>,
	Praveen Krishnamoorthy <praveen.krishnamoorthy@...gotech.com>,
	agross@...eaurora.org, MPT-FusionLinux.pdl@...gotech.com
Subject: Re: [PATCH V2 1/3] scsi: mptxsas: try 64 bit DMA when 32 bit DMA
 fails

On 11/09/2015 05:22 PM, Sinan Kaya wrote:
>
> if (ioc->dma_mask)
>      consistent_dma_mask = DMA_BIT_MASK(64);
> else
>      consistent_dma_mask = DMA_BIT_MASK(32);     <-- why here?

So this change is from this patch:

	http://permalink.gmane.org/gmane.linux.kernel/1759343

Note that this was discussed back in February:

	https://lkml.org/lkml/2015/2/20/2


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