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| author | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-08-21 22:14:14 +0200 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-08-29 16:19:11 +0200 |
| commit | 01b291bd66564b4bd826326af6bd0b6d17e99439 (patch) | |
| tree | 89ba1f339a68827c1ea0e434629759a9252b0a69 /include | |
| parent | [SCSI] make scsi_check_sense HARDWARE_ERROR return ADD_TO_MLQUEUE on retry (diff) | |
| download | linux-01b291bd66564b4bd826326af6bd0b6d17e99439.tar.xz linux-01b291bd66564b4bd826326af6bd0b6d17e99439.zip | |
[SCSI] fix check of PQ and PDT bits for WLUNs
For IBM z series certain LUNs can no longer be accessed.
This is because kernel version 2.6.19 a check was introduced not to
create a generic SCSI device for devices that return PQ=1 and
PDT=0x1f. For WLUNs (see SAM-3, p. 41ff) generic SCSI devices should
be created unconditionally without looking at the PQ bit, so add a
check for WLUNs in with this test.
Acked-by: Martin Petermann <martin@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/scsi/scsi.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h index 5c40cc537d4c..192f8716aa9e 100644 --- a/include/scsi/scsi.h +++ b/include/scsi/scsi.h @@ -309,6 +309,20 @@ struct scsi_lun { }; /* + * The Well Known LUNS (SAM-3) in our int representation of a LUN + */ +#define SCSI_W_LUN_BASE 0xc100 +#define SCSI_W_LUN_REPORT_LUNS (SCSI_W_LUN_BASE + 1) +#define SCSI_W_LUN_ACCESS_CONTROL (SCSI_W_LUN_BASE + 2) +#define SCSI_W_LUN_TARGET_LOG_PAGE (SCSI_W_LUN_BASE + 3) + +static inline int scsi_is_wlun(unsigned int lun) +{ + return (lun & 0xff00) == SCSI_W_LUN_BASE; +} + + +/* * MESSAGE CODES */ |