[PATCH 5.15 016/120] scsi: Revert "scsi: core: map PQ=1, PDT=other values to SCSI_SCAN_TARGET_PRESENT"

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



From: Martin K. Petersen <martin.petersen@xxxxxxxxxx>

[ Upstream commit 15600159bcc6abbeae6b33a849bef90dca28b78f ]

This reverts commit 948e922fc44611ee2de0c89583ca958cb5307d36.

Not all targets that return PQ=1 and PDT=0 should be ignored. While
the SCSI spec is vague in this department, there appears to be a
critical mass of devices which rely on devices being accessible with
this combination of reported values.

Fixes: 948e922fc446 ("scsi: core: map PQ=1, PDT=other values to SCSI_SCAN_TARGET_PRESENT")
Link: https://lore.kernel.org/r/yq1lelrleqr.fsf@xxxxxxxxxxxxxxxxxxxx
Acked-by: Bart Van Assche <bvanassche@xxxxxxx>
Acked-by: Martin Wilck <mwilck@xxxxxxxx>
Acked-by: Hannes Reinecke <hare@xxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/scsi/scsi_scan.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index 9466474ff01b..86c10edbb5f1 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -1206,8 +1206,7 @@ static int scsi_probe_and_add_lun(struct scsi_target *starget,
 	 * that no LUN is present, so don't add sdev in these cases.
 	 * Two specific examples are:
 	 * 1) NetApp targets: return PQ=1, PDT=0x1f
-	 * 2) IBM/2145 targets: return PQ=1, PDT=0
-	 * 3) USB UFI: returns PDT=0x1f, with the PQ bits being "reserved"
+	 * 2) USB UFI: returns PDT=0x1f, with the PQ bits being "reserved"
 	 *    in the UFI 1.0 spec (we cannot rely on reserved bits).
 	 *
 	 * References:
@@ -1221,8 +1220,8 @@ static int scsi_probe_and_add_lun(struct scsi_target *starget,
 	 * PDT=00h Direct-access device (floppy)
 	 * 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)) &&
+	if (((result[0] >> 5) == 1 || starget->pdt_1f_for_no_lun) &&
+	    (result[0] & 0x1f) == 0x1f &&
 	    !scsi_is_wlun(lun)) {
 		SCSI_LOG_SCAN_BUS(3, sdev_printk(KERN_INFO, sdev,
 					"scsi scan: peripheral device type"
-- 
2.39.0






[Index of Archives]     [Linux Kernel]     [Kernel Development Newbies]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Hiking]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux