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[SCSI] BLIST_ATTACH_PQ3 flags

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Some devices report a peripheral qualifier of 3 for LUN 0; with the original
code, we would still try a REPORT_LUNS scan (if SCSI level is >= 3 or if we
have the BLIST_REPORTLUNS2 passed in), but NOT any sequential scan.
Also, the device at LUN 0 (which is not connected according to the PQ) is not
registered with the OS.

Unfortunately, SANs exist that are SCSI-2 and do NOT support REPORT_LUNS, but
report a unknown device with PQ 3 on LUN 0. We still need to scan them, and
most probably we even need BLIST_SPARSELUN (and BLIST_LARGELUN). See the bug
reference for an infamous example.

This is patch 3/3:
3. Implement the blacklist flag BLIST_ATTACH_PQ3 that makes the scsi
   scanning code register PQ3 devices and continues scanning; only sg
   will attach thanks to scsi_bus_match().

Signed-off-by: Kurt Garloff <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
This commit is contained in:
Kurt Garloff 2006-04-03 15:20:08 +02:00 • committed by James Bottomley
commit 13f7e5acc8
3 changed files with 4 additions and 1 deletions
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1
include/scsi/scsi_devinfo.h
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@ -28,4 +28,5 @@
#define BLIST_NO_ULD_ATTACH 0x100000 /* device is actually for RAID config */
#define BLIST_SELECT_NO_ATN 0x200000 /* select without ATN */
#define BLIST_RETRY_HWERROR 0x400000 /* retry HARDWARE_ERROR */
#define BLIST_ATTACH_PQ3 0x800000 /* Scan: Attach to PQ3 devices */
#endif