[SCSI] Workaround for disks that report bad optimal transfer length

Not all disks fill out the VPD pages correctly. Add a blacklist flag
that allows us ignore the SBC-3 VPD pages for a given device. The
BLIST_SKIP_VPD_PAGES flag triggers our existing skip_vpd_pages
scsi_device parameter to bypass VPD scanning.

Also blacklist the offending Seagate drive model.

Reported-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index 852915a08465..307a81137607 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -926,6 +926,9 @@ static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result,
 
         sdev->eh_timeout = SCSI_DEFAULT_EH_TIMEOUT;
 
+        if (*bflags & BLIST_SKIP_VPD_PAGES)
+                sdev->skip_vpd_pages = 1;
+
         transport_configure_device(&sdev->sdev_gendev);
 
         if (sdev->host->hostt->slave_configure) {