Re: [PATCH] SCSI: Add Marvell Console to VPD blacklist

2016-02-04 Thread Martin K. Petersen
> "Mika" == Mika Westerberg  writes:

Mika> I have a Marvell 88SE9230 SATA Controller that has some sort of
Mika> integrated console SCSI device attached to one of the ports.

Applied to 4.5/scsi-fixes.

Thanks!

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Martin K. Petersen  Oracle Linux Engineering
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[PATCH] SCSI: Add Marvell Console to VPD blacklist

2016-01-27 Thread Mika Westerberg
I have a Marvell 88SE9230 SATA Controller that has some sort of
integrated console SCSI device attached to one of the ports.

  ata14: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
  ata14.00: ATAPI: MARVELL VIRTUALL, 1.09, max UDMA/66
  ata14.00: configured for UDMA/66
  scsi 13:0:0:0: Processor Marvell  Console 1.01 PQ: 0 ANSI: 5

Sending it VPD INQUIRY command seem to always fail with following error:

  ata14.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6
  ata14.00: irq_stat 0x4001
  ata14.00: cmd a0/01:00:00:00:01/00:00:00:00:00/a0 tag 2 dma 16640 in
Inquiry 12 01 00 00 ff 00res 00/00:00:00:00:00/00:00:00:00:00/00 
Emask 0x3 (HSM violation)
  ata14: hard resetting link

This has been minor annoyance (only error printed on dmesg) until commit
09e2b0b14690 ("scsi: rescan VPD attributes") added call to scsi_attach_vpd()
in scsi_rescan_device(). The commit causes the system to splat out
following errors continuously without ever reaching the UI:

  ata14.00: configured for UDMA/66
  ata14: EH complete
  ata14.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6
  ata14.00: irq_stat 0x4001
  ata14.00: cmd a0/01:00:00:00:01/00:00:00:00:00/a0 tag 6 dma 16640 in
Inquiry 12 01 00 00 ff 00res 00/00:00:00:00:00/00:00:00:00:00/00 
Emask 0x3 (HSM violation)
  ata14: hard resetting link
  ata14: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
  ata14.00: configured for UDMA/66
  ata14: EH complete
  ata14.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6
  ata14.00: irq_stat 0x4001
  ata14.00: cmd a0/01:00:00:00:01/00:00:00:00:00/a0 tag 7 dma 16640 in
Inquiry 12 01 00 00 ff 00res 00/00:00:00:00:00/00:00:00:00:00/00 
Emask 0x3 (HSM violation)

Without in-depth understanding of SCSI layer and the Marvell controller, I
suspect this happens because when the link goes down (because of an error)
we schedule scsi_rescan_device() which again fails to read VPD data... ad
infinitum.

Since VPD data cannot be read from the device anyway we prevent the SCSI
layer from even trying by blacklisting the device. This gets away the error
and the system starts up normally.

Signed-off-by: Mika Westerberg 
Cc: Hannes Reinecke 
---
I'm not sure if this is most ideal fix. Comment on top of
scsi_static_device_list[] says that the list is going away eventually and
suggest me to use command line instead. I can do that but then everyone
else having similar device will need to do the same to get rid of the boot
failure.

 drivers/scsi/scsi_devinfo.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/scsi/scsi_devinfo.c b/drivers/scsi/scsi_devinfo.c
index 47b9d13..350cbed 100644
--- a/drivers/scsi/scsi_devinfo.c
+++ b/drivers/scsi/scsi_devinfo.c
@@ -205,6 +205,7 @@ static struct {
{"Intel", "Multi-Flex", NULL, BLIST_NO_RSOC},
{"iRiver", "iFP Mass Driver", NULL, BLIST_NOT_LOCKABLE | 
BLIST_INQUIRY_36},
{"LASOUND", "CDX7405", "3.10", BLIST_MAX5LUN | BLIST_SINGLELUN},
+   {"Marvell", "Console", "1.01", BLIST_SKIP_VPD_PAGES},
{"MATSHITA", "PD-1", NULL, BLIST_FORCELUN | BLIST_SINGLELUN},
{"MATSHITA", "DMC-LC5", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
{"MATSHITA", "DMC-LC40", NULL, BLIST_NOT_LOCKABLE | BLIST_INQUIRY_36},
-- 
2.5.0

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