Bug 8791 - pata_hpt37x: BIOS has not set timing clocks.
Summary: pata_hpt37x: BIOS has not set timing clocks.
Status: CLOSED CODE_FIX
Alias: None
Product: IO/Storage
Classification: Unclassified
Component: Serial ATA (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: Alan
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2007-07-22 15:33 UTC by Bjoern Olausson
Modified: 2007-08-15 05:29 UTC (History)
2 users (show)

See Also:
Kernel Version: 2.6.22.1
Subsystem:
Regression: ---
Bisected commit-id:


Attachments
Diff for PLL tuning (1.24 KB, patch)
2007-07-23 07:09 UTC, Alan
Details | Diff

Description Bjoern Olausson 2007-07-22 15:33:03 UTC
Most recent kernel where this bug did not occur:
2.6.21.6

Distribution:
Gentoo

Hardware Environment:
00:00.0 Host bridge: VIA Technologies, Inc. PT880 Host Bridge
00:00.1 Host bridge: VIA Technologies, Inc. PT880 Host Bridge
00:00.2 Host bridge: VIA Technologies, Inc. PT880 Host Bridge
00:00.3 Host bridge: VIA Technologies, Inc. PT880 Host Bridge
00:00.4 Host bridge: VIA Technologies, Inc. PT880 Host Bridge
00:00.7 Host bridge: VIA Technologies, Inc. PT880 Host Bridge
00:01.0 PCI bridge: VIA Technologies, Inc. VT8237 PCI Bridge
00:0a.0 RAID bus controller: Triones Technologies, Inc. HPT374 (rev 07)
00:0a.1 RAID bus controller: Triones Technologies, Inc. HPT374 (rev 07)
00:0b.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 06)
00:0b.1 Input device controller: Creative Labs SB Live! Game Port (rev 06)
00:0c.0 Ethernet controller: D-Link System Inc DGE-528T Gigabit Ethernet Adapter (rev 10)
00:0d.0 Ethernet controller: Atheros Communications, Inc. AR5212 802.11abg NIC (rev 01)
00:0f.0 RAID bus controller: VIA Technologies, Inc. VIA VT6420 SATA RAID Controller (rev 80)
00:0f.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
00:10.3 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
00:10.4 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 86)
00:11.0 ISA bridge: VIA Technologies, Inc. VT8237 ISA bridge [KT600/K8T800/K8T890 South]
00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235/8237 AC97 Audio Controller (rev 60)
00:12.0 Ethernet controller: VIA Technologies, Inc. VT6102 [Rhine-II] (rev 78)
01:00.0 VGA compatible controller: nVidia Corporation NV44A [GeForce 6200] (rev a1)

Software Environment:

System uname: 2.6.22.1 i686 Intel(R) Celeron(R) CPU 2.66GHz
Gentoo Base System release 1.12.9
Timestamp of tree: Fri, 20 Jul 2007 10:50:01 +0000
distcc 2.18.3 i686-pc-linux-gnu (protocols 1 and 2) (default port 3632) [disabled]
ccache version 2.4 [enabled]
dev-lang/python:     2.4.4-r4
dev-python/pycrypto: 2.0.1-r5
dev-util/ccache:     2.4-r7
sys-apps/sandbox:    1.2.17
sys-devel/autoconf:  2.13, 2.61
sys-devel/automake:  1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10
sys-devel/binutils:  2.17
sys-devel/gcc-config: 1.3.16
sys-devel/libtool:   1.5.23b
virtual/os-headers:  2.6.21
ACCEPT_KEYWORDS="x86"
AUTOCLEAN="yes"
CBUILD="i686-pc-linux-gnu"
CFLAGS="-march=pentium4 -O2 -pipe -msse2 -mfpmath=sse -fomit-frame-pointer"
CHOST="i686-pc-linux-gnu"

Problem Description:
I switched from vanilla 2.6.21.6 to 2.6.22.1 and noticed that my drives attached to the Highpoint Rockedraid 454 had disapeared.

In dmsg I found the following:
hpt37x: DPLL did not stabilize.
pata_hpt37x: BIOS has not set timing clocks.
hpt37x: DPLL did not stabilize.

Steps to reproduce:
Use pata_hpt37x (compiled into kernel) with Highpoint Rockedraid 454 (HPT374)
Reboot as often as you like.

Using the "old" "HPT36X/37X chipset support" works fine.
But the behavior is new. In kernel 2.6.21.* the driver "pata_hpt37x" worked more or less so I could run my disks without problems.

I found the following which might belong to this issue:
"2.6.21-rc6-mm1 ATA HPT37x regression" (http://www.ussg.iu.edu/hypermail/linux/kernel/0704.2/0333.html)

For now I am runing fine with "HPT36X" but I would like to see it fixed.

For more infos, debug etc etc... let me know.

regards
Bjoern Olausson
Comment 1 Tejun Heo 2007-07-22 19:49:26 UTC
Alan?
Comment 2 Alan 2007-07-23 03:15:23 UTC
Groan, the HPT clocks are such a total pain. Interesting that the current 2.6.22 old HPT driver works as they in theory use identical code for the tuning. Added to the todo list.
Comment 3 Bjoern Olausson 2007-07-23 03:19:01 UTC
Thanks for fixing it.

regards
Bjoern Olausson
Comment 4 Alan 2007-07-23 07:08:37 UTC
Ok please try the attached change
Comment 5 Alan 2007-07-23 07:09:32 UTC
Created attachment 12104 [details]
Diff for PLL tuning
Comment 6 Bjoern Olausson 2007-07-24 05:35:47 UTC
Fine, works.

hpt37x: Bus clock 66MHz, using DPLL.
ACPI: PCI Interrupt 0000:00:0a.0[A] -> GSI 18 (level, low) -> IRQ 19
scsi2 : pata_hpt37x
scsi3 : pata_hpt37x
ata3: PATA max UDMA/100 cmd 0x00019c00 ctl 0x00019402 bmdma 0x00018800 irq 19
ata4: PATA max UDMA/100 cmd 0x00019000 ctl 0x00018c02 bmdma 0x00018808 irq 19

With this patch we can close the bug, I suggest.

Will it be included into 2.6.22 line?

Otherwise I'll submit this patch to gentoo bugtracker so they can include this patch into gentoo sources.

regards
Bjoern Olausson
Comment 7 Sergei Shtylyov 2007-07-24 08:02:23 UTC
(In reply to comment #6)

> Fine, works.

> hpt37x: Bus clock 66MHz, using DPLL.

Hm... HPT374 clocked by 66 MHz DPLL works? Interesting, I've recently fixed the "old" driver to clock it with only 50 MHz as it didn't seem to tolerate 66 MHz (and neither it supports UDMA133 for which this clock is necessary).
Comment 8 Alan 2007-07-24 08:05:55 UTC
Bus Clock not DPLL.

We set a 50MHz DPLL on the 374 (and any device not capable of UDMA133)

Alan
Comment 9 Sergei Shtylyov 2007-07-24 08:11:50 UTC
(In reply to comment #8)

> Bus Clock not DPLL.

> We set a 50MHz DPLL on the 374 (and any device not capable of UDMA133)

But it still has .udma_mask of 0x7f in pata_hpt37x.c.
Comment 10 Sergei Shtylyov 2007-07-24 08:16:22 UTC
(In reply to comment #9)
> (In reply to comment #8)

> > Bus Clock not DPLL.

> > We set a 50MHz DPLL on the 374 (and any device not capable of UDMA133)
 
> But it still has .udma_mask of 0x7f in pata_hpt37x.c.

Moreover, from looking at the code, it seems that will tune the DPLL to the bus clock.
Comment 11 Sergei Shtylyov 2007-07-24 08:18:54 UTC
(In reply to comment #10)
> (In reply to comment #9)
> > (In reply to comment #8)

> > > Bus Clock not DPLL.

> > > We set a 50MHz DPLL on the 374 (and any device not capable of UDMA133)

> > But it still has .udma_mask of 0x7f in pata_hpt37x.c.

> Moreover, from looking at the code, it seems that will tune the DPLL to the
> bus
> clock.

Sorry, was looking at 2.6.21 as it turned out. :-<
Comment 12 Sergei Shtylyov 2007-07-24 08:21:13 UTC
(In reply to comment #11)

> > > > Bus Clock not DPLL.

> > > > We set a 50MHz DPLL on the 374 (and any device not capable of UDMA133)

> > > But it still has .udma_mask of 0x7f in pata_hpt37x.c.

> > Moreover, from looking at the code, it seems that will tune the DPLL to the
> bus
> > clock.

> Sorry, was looking at 2.6.21 as it turned out. :-<

I mean sorry about the mask comment, not about the latter one which still seems to be true... :-/
Comment 13 Bjoern Olausson 2007-07-24 08:49:05 UTC
The system ist running for a few hours now and still everything is up and running. Thats all I can say from the "users" point of view ;-)

regards
Bjoern
Comment 14 Alan 2007-07-24 15:24:15 UTC
Committed 

Thanks for the bug report and testing
Comment 15 Bjoern Olausson 2007-07-26 19:24:55 UTC
Mhh, today I got a strange log entry...

I hope this is not related to the driver.
Maybe it's a hardware fault?

Jul 27 04:15:08 enterprise ata4.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
Jul 27 04:15:08 enterprise ata4.01: cmd 35/00:90:af:39:5d/00:02:00:00:00/f0 tag 0 cdb 0x0 data 335872 out
Jul 27 04:15:08 enterprise res 40/00:ff:00:00:00/00:00:00:00:00/50 Emask 0x4 (timeout)
Jul 27 04:15:08 enterprise ata4: soft resetting port
Jul 27 04:15:08 enterprise Find mode for 12 reports C829C62
Jul 27 04:15:08 enterprise Find mode for 12 reports C829C62
Jul 27 04:15:08 enterprise Find mode for DMA 69 reports 1CAE9C62
Jul 27 04:15:08 enterprise Find mode for DMA 69 reports 1CAE9C62
Jul 27 04:15:08 enterprise ata4.00: configured for UDMA/100
Jul 27 04:15:08 enterprise ata4.01: configured for UDMA/100
Jul 27 04:15:08 enterprise ata4: EH complete
Jul 27 04:15:08 enterprise sd 3:0:0:0: [sdc] 490234752 512-byte hardware sectors (251000 MB)
Jul 27 04:15:08 enterprise sd 3:0:0:0: [sdc] Write Protect is off
Jul 27 04:15:08 enterprise sd 3:0:0:0: [sdc] Mode Sense: 00 3a 00 00
Jul 27 04:15:08 enterprise sd 3:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Jul 27 04:15:08 enterprise sd 3:0:1:0: [sdd] 490234752 512-byte hardware sectors (251000 MB)
Jul 27 04:15:08 enterprise sd 3:0:1:0: [sdd] Write Protect is off
Jul 27 04:15:08 enterprise sd 3:0:1:0: [sdd] Mode Sense: 00 3a 00 00
Jul 27 04:15:08 enterprise sd 3:0:1:0: [sdd] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Jul 27 04:15:08 enterprise sd 3:0:0:0: [sdc] 490234752 512-byte hardware sectors (251000 MB)
Jul 27 04:15:09 enterprise sd 3:0:0:0: [sdc] Write Protect is off
Jul 27 04:15:09 enterprise sd 3:0:0:0: [sdc] Mode Sense: 00 3a 00 00
Jul 27 04:15:09 enterprise sd 3:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Jul 27 04:15:09 enterprise sd 3:0:1:0: [sdd] Write Protect is off
Jul 27 04:15:09 enterprise sd 3:0:1:0: [sdd] Mode Sense: 00 3a 00 00
Jul 27 04:15:09 enterprise sd 3:0:1:0: [sdd] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA

regards
Bjoern
Comment 16 Bjoern Olausson 2007-07-26 19:28:43 UTC
Jul 27 04:21:17 enterprise ata4.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
Jul 27 04:21:17 enterprise ata4.00: cmd 25/00:00:3f:7b:4f/00:02:01:00:00/e0 tag 0 cdb 0x0 data 262144 in
Jul 27 04:21:17 enterprise res 40/00:00:00:4f:c2/00:00:00:00:00/10 Emask 0x4 (timeout)
Jul 27 04:21:17 enterprise ata4: soft resetting port
Jul 27 04:21:17 enterprise ata4.01: revalidation failed (errno=-2)
Jul 27 04:21:17 enterprise ata4: failed to recover some devices, retrying in 5 secs
Jul 27 04:21:22 enterprise ata4: soft resetting port
Jul 27 04:21:22 enterprise ata4.01: revalidation failed (errno=-2)
Jul 27 04:21:22 enterprise ata4: failed to recover some devices, retrying in 5 secs
Jul 27 04:21:27 enterprise ata4: soft resetting port
Jul 27 04:21:27 enterprise ata4.01: revalidation failed (errno=-2)
Jul 27 04:21:27 enterprise ata4.01: disabled
Jul 27 04:21:27 enterprise ata4: failed to recover some devices, retrying in 5 secs
Jul 27 04:21:32 enterprise ata4.00: failed to IDENTIFY (I/O error, err_mask=0x40)
Jul 27 04:21:32 enterprise ata4.00: revalidation failed (errno=-5)
Jul 27 04:21:32 enterprise ata4: failed to recover some devices, retrying in 5 secs
Jul 27 04:21:37 enterprise ata4: soft resetting port
Jul 27 04:21:37 enterprise ata4.00: limited to UDMA/33 due to 40-wire cable
Jul 27 04:21:37 enterprise Find mode for 12 reports C829C62
Jul 27 04:21:37 enterprise Find mode for DMA 66 reports 1C929C62
Jul 27 04:21:37 enterprise ata4.00: configured for UDMA/33
Jul 27 04:21:37 enterprise ata4: EH complete
Jul 27 04:21:37 enterprise sd 3:0:1:0: [sdd] Result: hostbyte=0x04 driverbyte=0x00
Jul 27 04:21:37 enterprise end_request: I/O error, dev sdd, sector 21985599
Jul 27 04:21:37 enterprise raid5: Disk failure on sdd1, disabling device. Operation continuing on 3 devices
Jul 27 04:21:37 enterprise sd 3:0:1:0: [sdd] Result: hostbyte=0x04 driverbyte=0x00
Jul 27 04:21:37 enterprise end_request: I/O error, dev sdd, sector 21986031
Jul 27 04:21:37 enterprise sd 3:0:0:0: [sdc] 490234752 512-byte hardware sectors (251000 MB)
Jul 27 04:21:37 enterprise sd 3:0:0:0: [sdc] Write Protect is off
Jul 27 04:21:37 enterprise sd 3:0:0:0: [sdc] Mode Sense: 00 3a 00 00
Jul 27 04:21:38 enterprise sd 3:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Comment 17 Bjoern Olausson 2007-08-13 17:18:26 UTC
Alan, your patch worked fine on 2.6.22.1 but does not on 2.6.22.1, wich means in detail:

Linux boots fine, but asa. I start to copy stuff on the raid md3 (sda and sdb in raid level 1) it fails after a few MB.

Actually I can't be sure if it is caused by the driver and your patch or if something other went wrong in 2.6.22.2.

Only thing I can match in the changelog is this:

commit 74ff092c258313747791da5d82054027167d1a79
Author: Milan Broz <mbroz@redhat.com>
Date:   Thu Jul 12 17:27:24 2007 +0100

    dm raid1: fix status
    
    Fix mirror status line broken in dm-log-report-fault-status.patch:
      - space missing between two words
      - placeholder ("0") required for compatibility with a subsequent patch
      - incorrect offset parameter
    
    Signed-off-by: Milan Broz <mbroz@redhat.com>
    Signed-off-by: Alasdair G Kergon <agk@redhat.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>



I personally don't care to get it fixed in 2.6.22.* cause I'll stick with 2.6.22.1 until 2.6.23 will be released. Than I'll give it a shot.

But It is maybe of interesting for the you, and oterh devs.

regards
Bjoern

Kernel 2.6.22.1 <--- WORKS with patch
Kernel 2.6.22.2 <--- ERRORS with patch

Patch from Alan:
--- pata_hpt37x.c       2007-07-23 12:56:11.000000000 +0100
+++ pata_hpt37x.c       2007-07-23 14:44:39.003320584 +0100
@@ -26,7 +26,7 @@
 #include <linux/libata.h>

 #define DRV_NAME       "pata_hpt37x"
-#define DRV_VERSION    "0.6.6"
+#define DRV_VERSION    "0.6.7"

 struct hpt_clock {
        u8      xfer_speed;
@@ -1103,17 +1103,17 @@

                /* Select the DPLL clock. */
                pci_write_config_byte(dev, 0x5b, 0x21);
-               pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low);
+               pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low | 0x100);

                for(adjust = 0; adjust < 8; adjust++) {
                        if (hpt37x_calibrate_dpll(dev))
                                break;
                        /* See if it'll settle at a fractionally different clock */
-                       if ((adjust & 3) == 3) {
-                               f_low --;
-                               f_high ++;
-                       }
-                       pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low);
+                       if (adjust & 1)
+                               f_low -= adjust >> 1;
+                       else
+                               f_high += adjust >> 1;
+                       pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low | 0x100);
                }
                if (adjust == 8) {
                        printk(KERN_WARNING "hpt37x: DPLL did not stabilize.\n");




Aug  9 12:01:01 enterprise ata3.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
Aug  9 12:01:01 enterprise ata3.01: cmd c8/00:20:47:00:ee/00:00:00:00:00/fd tag 0 cdb 0x0 data 16384 in
Aug  9 12:01:01 enterprise res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
Aug  9 12:01:01 enterprise ata3: soft resetting port
Aug  9 12:01:01 enterprise cron[10127]: (root) CMD (/usr/bin/mrtg)
Aug  9 12:01:01 enterprise Find mode for 12 reports C829C62
Aug  9 12:01:01 enterprise Find mode for 12 reports C829C62
Aug  9 12:01:01 enterprise Find mode for DMA 69 reports 1CAE9C62
Aug  9 12:01:01 enterprise Find mode for DMA 69 reports 1CAE9C62
Aug  9 12:01:01 enterprise ata3.00: configured for UDMA/100
Aug  9 12:01:01 enterprise ata3.01: configured for UDMA/100
Aug  9 12:01:01 enterprise ata3: EH complete
Aug  9 12:01:02 enterprise sd 2:0:0:0: [sda] 398297088 512-byte hardware sectors (203928 MB)
Aug  9 12:01:02 enterprise sd 2:0:0:0: [sda] Write Protect is off
Aug  9 12:01:02 enterprise sd 2:0:0:0: [sda] Mode Sense: 00 3a 00 00
Aug  9 12:01:02 enterprise sd 2:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Aug  9 12:01:02 enterprise sd 2:0:1:0: [sdb] 398297088 512-byte hardware sectors (203928 MB)
Aug  9 12:01:02 enterprise sd 2:0:1:0: [sdb] Write Protect is off
Aug  9 12:01:02 enterprise sd 2:0:1:0: [sdb] Mode Sense: 00 3a 00 00
Aug  9 12:01:02 enterprise sd 2:0:1:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA


Aug  9 12:02:02 enterprise ata3.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
Aug  9 12:02:02 enterprise ata3.01: cmd c8/00:08:8f:02:ec/00:00:00:00:00/fd tag 0 cdb 0x0 data 4096 in
Aug  9 12:02:02 enterprise res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
Aug  9 12:02:02 enterprise ata3: soft resetting port
Aug  9 12:02:02 enterprise Find mode for 12 reports C829C62
Aug  9 12:02:02 enterprise Find mode for 12 reports C829C62
Aug  9 12:02:02 enterprise Find mode for DMA 69 reports 1CAE9C62
Aug  9 12:02:02 enterprise Find mode for DMA 69 reports 1CAE9C62
Aug  9 12:02:02 enterprise ata3.00: configured for UDMA/100
Aug  9 12:02:02 enterprise ata3.01: configured for UDMA/100
Aug  9 12:02:02 enterprise ata3: EH complete
Aug  9 12:02:02 enterprise sd 2:0:0:0: [sda] 398297088 512-byte hardware sectors (203928 MB)
Aug  9 12:02:02 enterprise sd 2:0:0:0: [sda] Write Protect is off
Aug  9 12:02:02 enterprise sd 2:0:0:0: [sda] Mode Sense: 00 3a 00 00
Aug  9 12:02:02 enterprise sd 2:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Aug  9 12:02:02 enterprise sd 2:0:1:0: [sdb] 398297088 512-byte hardware sectors (203928 MB)
Aug  9 12:02:02 enterprise sd 2:0:1:0: [sdb] Write Protect is off
Aug  9 12:02:02 enterprise sd 2:0:1:0: [sdb] Mode Sense: 00 3a 00 00
Aug  9 12:02:02 enterprise sd 2:0:1:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Aug  9 12:02:02 enterprise sd 2:0:0:0: [sda] 398297088 512-byte hardware sectors (203928 MB)
Aug  9 12:02:02 enterprise sd 2:0:0:0: [sda] Write Protect is off
Aug  9 12:02:02 enterprise sd 2:0:0:0: [sda] Mode Sense: 00 3a 00 00
Aug  9 12:02:02 enterprise sd 2:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Aug  9 12:02:02 enterprise sd 2:0:1:0: [sdb] 398297088 512-byte hardware sectors (203928 MB)
Aug  9 12:02:02 enterprise sd 2:0:1:0: [sdb] Write Protect is off
Aug  9 12:02:02 enterprise sd 2:0:1:0: [sdb] Mode Sense: 00 3a 00 00
Aug  9 12:02:02 enterprise sd 2:0:1:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Comment 18 Bjoern Olausson 2007-08-13 17:20:28 UTC
Sory, a typo:

replace:

"Alan, your patch worked fine on 2.6.22.1 but does not on 2.6.22.1, wich means
in detail:"

with

"Alan, your patch worked fine on 2.6.22.1 but does not on 2.6.22.2, wich means
in detail:"

Regards
BJoern
Comment 19 Bjoern Olausson 2007-08-15 05:29:52 UTC
I added a new bugreport on this cause I thing it is caused by MD and closing this bug again.

http://bugzilla.kernel.org/show_bug.cgi?id=8889

Thanks
Bjoern

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