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authorJames Bottomley <James.Bottomley@HansenPartnership.com>2008-08-21 15:14:14 -0500
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2008-08-29 09:19:11 -0500
commit01b291bd66564b4bd826326af6bd0b6d17e99439 (patch)
tree89ba1f339a68827c1ea0e434629759a9252b0a69 /drivers/scsi
parentbb0003c1e189d5766b6b39299b08c690c985c4dc (diff)
[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 'drivers/scsi')
-rw-r--r--drivers/scsi/scsi_scan.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index 84b4879cff1..34d0de6cd51 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -1080,7 +1080,8 @@ static int scsi_probe_and_add_lun(struct scsi_target *starget,
* PDT=1Fh none (no FDD connected to the requested logical unit)
*/
if (((result[0] >> 5) == 1 || starget->pdt_1f_for_no_lun) &&
- (result[0] & 0x1f) == 0x1f) {
+ (result[0] & 0x1f) == 0x1f &&
+ !scsi_is_wlun(lun)) {
SCSI_LOG_SCAN_BUS(3, printk(KERN_INFO
"scsi scan: peripheral device type"
" of 31, no device added\n"));