From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Martin K. Petersen" <martin.petersen@oracle.com>
Subject: Re: [RESEND][PATCH 07/10][SCSI]mpt2sas: Added Reply Descriptor Post Queue (RDPQ) Array support
Date: Wed, 26 Apr 2017 18:25:23 -0400
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        (Sreekanth Reddy's message of "Tue, 25 Apr 2017 17:21:07 +0530")
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To: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>, "jejb@kernel.org" <jejb@kernel.org>, "linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Christoph Hellwig <hch@infradead.org>
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Sreekanth,

> We need to satisfy this condition on those system where 32 bit dma
> consistent mask is not supported and it only supports 64 bit dma
> consistent mask. So on these system we can't set
> pci_set_consistent_dma_mask() to DMA_BIT_MASK(32).

Which systems are you talking about?

It seems a bit unrealistic to require all devices to support 64-bit DMA.

-- 
Martin K. Petersen	Oracle Linux Engineering