From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 85151] pm80xx + 7805H + HP SAS port expander =
mpi_smp_completion 2604:smp IO status 0x2 and sas: expander ... discovery
failed(0xffffffa6)
Date: Fri, 10 Oct 2014 21:32:26 +0000
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https://bugzilla.kernel.org/show_bug.cgi?id=85151
--- Comment #12 from linux-ide@crashplan.pro ---
Note the changed behavior with kernel "Linux ubuntu14 3.17.0-031700rc7-generic
#201409281835 SMP Sun Sep 28 22:36:30 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux"
&& patched pm80xx, despite the SAS discovery errors the HP SAS expander is now
visible:
# lsscsi -g
[0:0:0:0] disk ATA OCZ-VERTEX 1.3 /dev/sda /dev/sg0
[4:0:0:0] enclosu HP HP SAS EXP Card 2.10 - /dev/sg1
===
2nd HP SAS expander card = ok
===
Tried with a second HP SAS expander card, that also lists ok in lsscsi.
===
1 day more recent mainline kernel using unpatched pm80xx.ko = not ok
===
# uname -a
Linux ubuntu14 3.17.0-999-generic #201409282205 SMP Mon Sep 29 02:06:39 UTC
2014 x86_64 x86_64 x86_64 GNU/Linux
# modprobe -v pm80xx
...
insmod /lib/modules/3.17.0-999-generic/kernel/drivers/scsi/pm8001/pm80xx.ko
# lsscsi -g
[0:0:0:0] disk ATA OCZ-VERTEX 1.3 /dev/sda /dev/sg0
===
Copying this patched mv80xx over to 3.17.0-999 = ok
===
Unload
# modprobe -rv pm80xx
Rename stock kernel module
# mv /lib/modules/3.17.0-999-generic/kernel/drivers/scsi/pm8001/pm80xx.ko
/lib/modules/3.17.0-999-generic/kernel/drivers/scsi/pm8001/pm80xx.ko.bak
Copy
# cp /lib/modules/3.17.0-031700rc7-generic/extra/pm80xx.ko
/lib/modules/3.17.0-999-generic/extra/pm80xx.ko && depmod
# modprobe -v pm80xx
...
insmod /lib/modules/3.17.0-999-generic/extra/pm80xx.ko
# lsscsi -g
[0:0:0:0] disk ATA OCZ-VERTEX 1.3 /dev/sda /dev/sg0
[6:0:0:0] enclosu HP HP SAS EXP Card 2.10 - /dev/sg1
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