From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965837Ab0GSSkQ (ORCPT ); Mon, 19 Jul 2010 14:40:16 -0400 Received: from g4t0015.houston.hp.com ([15.201.24.18]:5232 "EHLO g4t0015.houston.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965636Ab0GSSkK (ORCPT ); Mon, 19 Jul 2010 14:40:10 -0400 Subject: [PATCH 12/26] cciss: factor out cciss_enable_scsi_prefetch() To: axboe@kernel.dk From: "Stephen M. Cameron" Cc: akpm@linux-foundation.org, mikem@beardog.cce.hp.com, linux-kernel@vger.kernel.org, brace@beardog.cce.hp.com Date: Mon, 19 Jul 2010 13:45:41 -0500 Message-ID: <20100719184541.7908.63558.stgit@beardog.cce.hp.com> In-Reply-To: <20100719184141.7908.26971.stgit@beardog.cce.hp.com> References: <20100719184141.7908.26971.stgit@beardog.cce.hp.com> User-Agent: StGit/0.15 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Stephen M. Cameron cciss: factor out cciss_enable_scsi_prefetch() Signed-off-by: Stephen M. Cameron --- drivers/block/cciss.c | 23 +++++++++++++---------- 1 files changed, 13 insertions(+), 10 deletions(-) diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index 9a48695..b4264bc 100644 --- a/drivers/block/cciss.c +++ b/drivers/block/cciss.c @@ -4108,6 +4108,18 @@ static inline bool CISS_signature_present(ctlr_info_t *h) return true; } +/* Need to enable prefetch in the SCSI core for 6400 in x86 */ +static inline void cciss_enable_scsi_prefetch(ctlr_info_t *h) +{ +#ifdef CONFIG_X86 + u32 prefetch; + + prefetch = readl(&(h->cfgtable->SCSI_Prefetch)); + prefetch |= 0x100; + writel(prefetch, &(h->cfgtable->SCSI_Prefetch)); +#endif +} + static int __devinit cciss_pci_init(ctlr_info_t *c) { int prod_index, err; @@ -4169,16 +4181,7 @@ static int __devinit cciss_pci_init(ctlr_info_t *c) err = -ENODEV; goto err_out_free_res; } -#ifdef CONFIG_X86 - { - /* Need to enable prefetch in the SCSI core for 6400 in x86 */ - __u32 prefetch; - prefetch = readl(&(c->cfgtable->SCSI_Prefetch)); - prefetch |= 0x100; - writel(prefetch, &(c->cfgtable->SCSI_Prefetch)); - } -#endif - + cciss_enable_scsi_prefetch(c); /* Disabling DMA prefetch and refetch for the P600. * An ASIC bug may result in accesses to invalid memory addresses. * We've disabled prefetch for some time now. Testing with XEN