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authorJu, Seokmann <Seokmann.Ju@lsil.com>2006-07-25 10:45:06 -0400
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2006-07-28 14:19:12 -0400
commit0b4972d59170e13ab0236e8a7148112052590c01 (patch)
tree640bc811d371d245b7259383b0e95ce28c388c2b /Documentation/scsi/ChangeLog.megaraid
parentaa677bc7445147f663ebde69d248a30839bada76 (diff)
[SCSI] megaraid_{mm,mbox}: a fix on "kernel unaligned access address" issue
There was an issue in the data structure defined by megaraid driver casuing "kernel unaligned access.." messages to be displayed during IOCTL on IA64 platform. The issue has been reported/fixed by Sakurai Hiroomi [sakurai_hiro@soft.fujitsu.com]. Signed-Off By: Seokmann Ju <seokmann.ju@lsil.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'Documentation/scsi/ChangeLog.megaraid')
-rw-r--r--Documentation/scsi/ChangeLog.megaraid55
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)
66 Fix: MegaRAID F/W has fixed the problem and being process of release, 66 Fix: MegaRAID F/W has fixed the problem and being process of release,
67 soon. Meanwhile, driver will filter out the request. 67 soon. Meanwhile, driver will filter out the request.
68 68
693. One of member in the data structure of the driver leads unaligne
70 issue on 64-bit platform.
71 Customer reporeted "kernel unaligned access addrss" issue when
72 application communicates with MegaRAID HBA driver.
73 Root Cause: in uioc_t structure, one of member had misaligned and it
74 led system to display the error message.
75 Fix: A patch submitted to community from following folk.
76
77 > -----Original Message-----
78 > From: linux-scsi-owner@vger.kernel.org
79 > [mailto:linux-scsi-owner@vger.kernel.org] On Behalf Of Sakurai Hiroomi
80 > Sent: Wednesday, July 12, 2006 4:20 AM
81 > To: linux-scsi@vger.kernel.org; linux-kernel@vger.kernel.org
82 > Subject: Re: Help: strange messages from kernel on IA64 platform
83 >
84 > Hi,
85 >
86 > I saw same message.
87 >
88 > When GAM(Global Array Manager) is started, The following
89 > message output.
90 > kernel: kernel unaligned access to 0xe0000001fe1080d4,
91 > ip=0xa000000200053371
92 >
93 > The uioc structure used by ioctl is defined by packed,
94 > the allignment of each member are disturbed.
95 > In a 64 bit structure, the allignment of member doesn't fit 64 bit
96 > boundary. this causes this messages.
97 > In a 32 bit structure, we don't see the message because the allinment
98 > of member fit 32 bit boundary even if packed is specified.
99 >
100 > patch
101 > I Add 32 bit dummy member to fit 64 bit boundary. I tested.
102 > We confirmed this patch fix the problem by IA64 server.
103 >
104 > **************************************************************
105 > ****************
106 > --- linux-2.6.9/drivers/scsi/megaraid/megaraid_ioctl.h.orig
107 > 2006-04-03 17:13:03.000000000 +0900
108 > +++ linux-2.6.9/drivers/scsi/megaraid/megaraid_ioctl.h
109 > 2006-04-03 17:14:09.000000000 +0900
110 > @@ -132,6 +132,10 @@
111 > /* Driver Data: */
112 > void __user * user_data;
113 > uint32_t user_data_len;
114 > +
115 > + /* 64bit alignment */
116 > + uint32_t pad_0xBC;
117 > +
118 > mraid_passthru_t __user *user_pthru;
119 >
120 > mraid_passthru_t *pthru32;
121 > **************************************************************
122 > ****************
123
69Release Date : Mon Apr 11 12:27:22 EST 2006 - Seokmann Ju <sju@lsil.com> 124Release Date : Mon Apr 11 12:27:22 EST 2006 - Seokmann Ju <sju@lsil.com>
70Current Version : 2.20.4.8 (scsi module), 2.20.2.6 (cmm module) 125Current Version : 2.20.4.8 (scsi module), 2.20.2.6 (cmm module)
71Older Version : 2.20.4.7 (scsi module), 2.20.2.6 (cmm module) 126Older Version : 2.20.4.7 (scsi module), 2.20.2.6 (cmm module)