Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758512AbXK0PdH (ORCPT ); Tue, 27 Nov 2007 10:33:07 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753480AbXK0Pcy (ORCPT ); Tue, 27 Nov 2007 10:32:54 -0500 Received: from palinux.external.hp.com ([192.25.206.14]:36380 "EHLO mail.parisc-linux.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752957AbXK0Pcx (ORCPT ); Tue, 27 Nov 2007 10:32:53 -0500 Date: Tue, 27 Nov 2007 08:32:52 -0700 From: Matthew Wilcox To: "Yang, Bo" Cc: linux-scsi@vger.kernel.org, James.Bottomley@SteelEye.com, akpm@osdl.org, linux-kernel@vger.kernel.org, "Patro, Sumant" , "Kolli, Neela" Subject: Re: [PATCH 1/1] scsi: megaraid_sas - Fix random failure of DCDB cmds with sense info Message-ID: <20071127153252.GC3230@parisc-linux.org> References: <20071120204202.GJ12494@parisc-linux.org> <9738BCBE884FDB42801FAD8A7769C26501D337D4@NAMAIL1.ad.lsil.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <9738BCBE884FDB42801FAD8A7769C26501D337D4@NAMAIL1.ad.lsil.com> User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6167 Lines: 165 On Tue, Nov 27, 2007 at 08:19:09AM -0700, Yang, Bo wrote: > Matthew, > > Thanks for your review. > > We have a 32 bit application(s) (megaraid utility) that is used in both > x86 and x86_64. > For ia64, the application is built in ia64 environment. Are you saying the application is built 32-bit for x86-64? Is it true that, if this application were built 64-bit for x86-64, you would have the same situation as with ia64? > The sense_ptr picked up from the ioc->frame.raw is a 32-bit value from > the application. When we make it "unsigned long*" it picks up a 64-bit > value & the copy_to_user fails. Without this fix the issue is seen in > x86_64 kernels. But for ia64 it is an unsigned long * value (8 bytes) > and so we need a compile time flag. > > Regards, > > Bo Yang > > -----Original Message----- > From: Matthew Wilcox [mailto:matthew@wil.cx] > Sent: Tuesday, November 20, 2007 3:42 PM > To: Yang, Bo > Cc: linux-scsi@vger.kernel.org; James.Bottomley@SteelEye.com; > akpm@osdl.org; linux-kernel@vger.kernel.org; Patro, Sumant; Kolli, Neela > Subject: Re: [PATCH 1/1] scsi: megaraid_sas - Fix random failure of DCDB > cmds with sense info > > On Wed, Nov 21, 2007 at 08:40:56AM +0000, bo yang wrote: > > Sense buffer ptr data type in the ioctl path is reverted back to u32 * > > > for x86 and x86_64 as in previous versions of driver. For IA64 it will > > > be unsigned long *. Compile time flag added for ia64 for this. > > This changelog tells us what you're doing, but not why you're doing it. > Why is it that ia64 is different from x86 and x86_64? What should other > architectures be doing? This patch really doesn't make any sense to me > at all; it should be doing the exact same thing on all three > architectures. > > > Signed-off-by: Bo Yang > > > > --- > > Documentation/scsi/ChangeLog.megaraid_sas | 15 +++++++++++++++ > > drivers/scsi/megaraid/megaraid_sas.c | 14 ++++++++++---- > > drivers/scsi/megaraid/megaraid_sas.h | 6 +++--- > > 3 files changed, 28 insertions(+), 7 deletions(-) > > > > diff -rupN linux-2.6.22_orig/Documentation/scsi/ChangeLog.megaraid_sas > linux-2.6.22_new/Documentation/scsi/ChangeLog.megaraid_sas > > --- linux-2.6.22_orig/Documentation/scsi/ChangeLog.megaraid_sas > 2007-11-20 17:50:13.000000000 -0500 > > +++ linux-2.6.22_new/Documentation/scsi/ChangeLog.megaraid_sas > 2007-11-20 21:37:16.000000000 -0500 > > @@ -1,3 +1,18 @@ > > +1 Release Date : Thur. Nov. 19 16:30:43 PST 2007 - > > + (emaild-id:megaraidlinux@lsi.com) > > + Sumant Patro > > + Bo Yang > > + > > +2 Current Version : 00.00.03.17-RC1 > > +3 Older Version : 00.00.03.16 > > + > > +1. Fix random failure of DCDB cmds with sense info. > > + > > +Fix: sense buffer ptr data type in the ioctl path is reverted > back > > + to u32 * for x86, x86_64 as in previous versions of driver. > > + For IA64 it will be unsigned long *. Compile time flag added > > + for ia64 for this. > > + > > 1 Release Date : Thur. Nov. 07 16:30:43 PST 2007 - > > (emaild-id:megaraidlinux@lsi.com) > > Sumant Patro > > diff -rupN linux-2.6.22_orig/drivers/scsi/megaraid/megaraid_sas.c > linux-2.6.22_new/drivers/scsi/megaraid/megaraid_sas.c > > --- linux-2.6.22_orig/drivers/scsi/megaraid/megaraid_sas.c > 2007-11-20 17:50:13.000000000 -0500 > > +++ linux-2.6.22_new/drivers/scsi/megaraid/megaraid_sas.c > 2007-11-20 17:50:13.000000000 -0500 > > @@ -10,7 +10,7 @@ > > * 2 of the License, or (at your option) any later version. > > * > > * FILE : megaraid_sas.c > > - * Version : v00.00.03.16-rc1 > > + * Version : v00.00.03.17-rc1 > > * > > * Authors: > > * (email-id : megaraidlinux@lsi.com) > > @@ -3020,10 +3020,16 @@ megasas_mgmt_fw_ioctl(struct megasas_ins > > * sense buffer address > > */ > > sense_buff = (unsigned long *) ((unsigned > long)ioc->frame.raw + > > - > ioc->sense_off); > > - > > - if (copy_to_user((void __user *)(unsigned > long)(*sense_buff), > > + ioc->sense_off); > > + sense_ptr = (u32 *) ((unsigned long)ioc->frame.raw + > > + ioc->sense_off); > > +#if defined(__ia64__) > > + if (copy_to_user((void __user *)((unsigned > long)(*sense_buff)), > > + sense, ioc->sense_len)) { > > +#else > > + if (copy_to_user((void __user *)((unsigned > long)(*sense_ptr)), > > sense, ioc->sense_len)) { > > +#endif > > printk(KERN_ERR "megasas: Failed to copy out to > user " > > "sense data\n"); > > error = -EFAULT; > > diff -rupN linux-2.6.22_orig/drivers/scsi/megaraid/megaraid_sas.h > linux-2.6.22_new/drivers/scsi/megaraid/megaraid_sas.h > > --- linux-2.6.22_orig/drivers/scsi/megaraid/megaraid_sas.h > 2007-11-20 17:50:13.000000000 -0500 > > +++ linux-2.6.22_new/drivers/scsi/megaraid/megaraid_sas.h > 2007-11-20 17:50:13.000000000 -0500 > > @@ -18,9 +18,9 @@ > > /* > > * MegaRAID SAS Driver meta data > > */ > > -#define MEGASAS_VERSION > "00.00.03.16-rc1" > > -#define MEGASAS_RELDATE "Nov. 07, 2007" > > -#define MEGASAS_EXT_VERSION "Thu. Nov. 07 10:09:32 > PDT 2007" > > +#define MEGASAS_VERSION > "00.00.03.17-rc1" > > +#define MEGASAS_RELDATE "Nov. 19, 2007" > > +#define MEGASAS_EXT_VERSION "Mon. Nov. 19 10:09:32 > PDT 2007" > > > > /* > > * Device IDs > > > > - > > To unsubscribe from this list: send the line "unsubscribe linux-scsi" > > in the body of a message to majordomo@vger.kernel.org More majordomo > > info at http://vger.kernel.org/majordomo-info.html > > -- > Intel are signing my paycheques ... these opinions are still mine "Bill, > look, we understand that you're interested in selling us this operating > system, but compare it to ours. We can't possibly take such a > retrograde step." -- Intel are signing my paycheques ... these opinions are still mine "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. 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