From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1031540AbdDZW0H (ORCPT ); Wed, 26 Apr 2017 18:26:07 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:36929 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1031509AbdDZW0C (ORCPT ); Wed, 26 Apr 2017 18:26:02 -0400 To: Sreekanth Reddy Cc: "Martin K. Petersen" , "jejb\@kernel.org" , "linux-scsi\@vger.kernel.org" , "linux-kernel\@vger.kernel.org" , Christoph Hellwig Subject: Re: [RESEND][PATCH 07/10][SCSI]mpt2sas: Added Reply Descriptor Post Queue (RDPQ) Array support From: "Martin K. Petersen" Organization: Oracle Corporation References: <20140625103445.GA12943@avagotech.com> Date: Wed, 26 Apr 2017 18:25:23 -0400 In-Reply-To: (Sreekanth Reddy's message of "Tue, 25 Apr 2017 17:21:07 +0530") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Source-IP: userv0021.oracle.com [156.151.31.71] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Martin K. Petersen" 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 Message-ID: References: <20140625103445.GA12943@avagotech.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: (Sreekanth Reddy's message of "Tue, 25 Apr 2017 17:21:07 +0530") Sender: linux-kernel-owner@vger.kernel.org To: Sreekanth Reddy Cc: "Martin K. Petersen" , "jejb@kernel.org" , "linux-scsi@vger.kernel.org" , "linux-kernel@vger.kernel.org" , Christoph Hellwig List-Id: linux-scsi@vger.kernel.org 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