1 files changed, 55 insertions, 0 deletions

diff --git a/Documentation/scsi/ChangeLog.megaraid b/Documentation/scsi/ChangeLog.megaraid
index 0edb048b2ea4..a056bbe67c7e 100644
--- a/Documentation/scsi/ChangeLog.megaraid
+++ b/Documentation/scsi/ChangeLog.megaraid
@@ -66,6 +66,61 @@ Older Version	: 2.20.4.8 (scsi module), 2.20.2.6 (cmm module)
         Fix: MegaRAID F/W has fixed the problem and being process of release,
         soon. Meanwhile, driver will filter out the request.
 
+3.      One of member in the data structure of the driver leads unaligne
+        issue on 64-bit platform.
+        Customer reporeted "kernel unaligned access addrss" issue when
+        application communicates with MegaRAID HBA driver.
+        Root Cause: in uioc_t structure, one of member had misaligned and it
+        led system to display the error message.
+        Fix: A patch submitted to community from following folk.
+
+        > -----Original Message-----
+        > From: linux-scsi-owner@vger.kernel.org
+        > [mailto:linux-scsi-owner@vger.kernel.org] On Behalf Of Sakurai Hiroomi
+        > Sent: Wednesday, July 12, 2006 4:20 AM
+        > To: linux-scsi@vger.kernel.org; linux-kernel@vger.kernel.org
+        > Subject: Re: Help: strange messages from kernel on IA64 platform
+        >
+        > Hi,
+        >
+        > I saw same message.
+        >
+        > When GAM(Global Array Manager) is started, The following
+        > message output.
+        > kernel: kernel unaligned access to 0xe0000001fe1080d4,
+        > ip=0xa000000200053371
+        >
+        > The uioc structure used by ioctl is defined by packed,
+        > the allignment of each member are disturbed.
+        > In a 64 bit structure, the allignment of member doesn't fit 64 bit
+        > boundary. this causes this messages.
+        > In a 32 bit structure, we don't see the message because the allinment
+        > of member fit 32 bit boundary even if packed is specified.
+        >
+        > patch
+        > I Add 32 bit dummy member to fit 64 bit boundary. I tested.
+        > We confirmed this patch fix the problem by IA64 server.
+        >
+        > **************************************************************
+        > ****************
+        > --- linux-2.6.9/drivers/scsi/megaraid/megaraid_ioctl.h.orig
+        > 2006-04-03 17:13:03.000000000 +0900
+        > +++ linux-2.6.9/drivers/scsi/megaraid/megaraid_ioctl.h
+        > 2006-04-03 17:14:09.000000000 +0900
+        > @@ -132,6 +132,10 @@
+        >  /* Driver Data: */
+        >          void __user *           user_data;
+        >          uint32_t                user_data_len;
+        > +
+        > +        /* 64bit alignment */
+        > +        uint32_t                pad_0xBC;
+        > +
+        >          mraid_passthru_t        __user *user_pthru;
+        >
+        >          mraid_passthru_t        *pthru32;
+        > **************************************************************
+        > ****************
+
 Release Date    : Mon Apr 11 12:27:22 EST 2006 - Seokmann Ju <sju@lsil.com>
 Current Version : 2.20.4.8 (scsi module), 2.20.2.6 (cmm module)
 Older Version   : 2.20.4.7 (scsi module), 2.20.2.6 (cmm module)