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authorMartin K. Petersen <martin.petersen@oracle.com>2012-08-28 14:29:35 -0400
committerJames Bottomley <JBottomley@Parallels.com>2012-09-24 12:11:00 +0400
commitd974e4265dbd35db118c318176727ecb7f469de3 (patch)
treefbec9c25dbed708722d334601ed0adcf38f210cd /include/scsi/scsi_device.h
parent8172499aae4d375334cfe6361900929c3b31a03f (diff)
downloadop-kernel-dev-d974e4265dbd35db118c318176727ecb7f469de3.zip
op-kernel-dev-d974e4265dbd35db118c318176727ecb7f469de3.tar.gz
[SCSI] Disable DIF on Hitachi Ultrastar 15K300
Hitachi Ultrastar 15K300 is quirky. Disable T10 PI (DIF). Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'include/scsi/scsi_device.h')
-rw-r--r--include/scsi/scsi_device.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index 9895f69..88fae8d 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -156,6 +156,7 @@ struct scsi_device {
unsigned is_visible:1; /* is the device visible in sysfs */
unsigned can_power_off:1; /* Device supports runtime power off */
unsigned wce_default_on:1; /* Cache is ON by default */
+ unsigned no_dif:1; /* T10 PI (DIF) should be disabled */
DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */
struct list_head event_list; /* asserted events */
@@ -476,6 +477,9 @@ static inline int scsi_device_enclosure(struct scsi_device *sdev)
static inline int scsi_device_protection(struct scsi_device *sdev)
{
+ if (sdev->no_dif)
+ return 0;
+
return sdev->scsi_level > SCSI_2 && sdev->inquiry[5] & (1<<0);
}
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