From c710af088d4c9d738d621990d78a9ed04ba9c04c Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Tue, 8 Aug 2006 14:08:59 +0900
Subject: [PATCH] --- yaml --- r: 33293 b: refs/heads/master c:
 22aac0896b1b0b8cabaf00714c55dd12f25d5738 h: refs/heads/master i:   33291:
 ecb43014c161225965cd8dcbd628e816f8811f00 v: v3

---
 [refs]                           |  2 +-
 trunk/drivers/scsi/libata-scsi.c | 13 +++++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 5902e81e23dc..4b92e7be2905 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 85455dd34219376dcc7dce94bea67058f0b7d731
+refs/heads/master: 22aac0896b1b0b8cabaf00714c55dd12f25d5738
diff --git a/trunk/drivers/scsi/libata-scsi.c b/trunk/drivers/scsi/libata-scsi.c
index 7ced41ecde86..e92c31d698ff 100644
--- a/trunk/drivers/scsi/libata-scsi.c
+++ b/trunk/drivers/scsi/libata-scsi.c
@@ -2353,6 +2353,19 @@ static void atapi_qc_complete(struct ata_queued_cmd *qc)
 			ata_gen_ata_desc_sense(qc);
 		}
 
+		/* SCSI EH automatically locks door if sdev->locked is
+		 * set.  Sometimes door lock request continues to
+		 * fail, for example, when no media is present.  This
+		 * creates a loop - SCSI EH issues door lock which
+		 * fails and gets invoked again to acquire sense data
+		 * for the failed command.
+		 *
+		 * If door lock fails, always clear sdev->locked to
+		 * avoid this infinite loop.
+		 */
+		if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
+			qc->dev->sdev->locked = 0;
+
 		qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
 		qc->scsidone(cmd);
 		ata_qc_free(qc);