From 3645c83122acc1fd78c984dd690f689dc7b1cd10 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 15 May 2006 21:03:39 +0900
Subject: [PATCH] --- yaml --- r: 29429 b: refs/heads/master c:
 2115ea94a2d11fbd228b049e667ec2d3e91ca371 h: refs/heads/master i:   29427:
 d5d323b266b5b85c5ed797452a9edb4ffe340373 v: v3

---
 [refs]                           |  2 +-
 trunk/drivers/scsi/libata-scsi.c | 40 +++++++++++++++++++-------------
 2 files changed, 25 insertions(+), 17 deletions(-)

diff --git a/[refs] b/[refs]
index 38afe8fac3cb..eea3034d9894 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 88e490340ea4c3a2ebc0187a4339912e2fc1a081
+refs/heads/master: 2115ea94a2d11fbd228b049e667ec2d3e91ca371
diff --git a/trunk/drivers/scsi/libata-scsi.c b/trunk/drivers/scsi/libata-scsi.c
index e61cc357ae4a..96517ca021e3 100644
--- a/trunk/drivers/scsi/libata-scsi.c
+++ b/trunk/drivers/scsi/libata-scsi.c
@@ -1248,11 +1248,14 @@ static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
  *
  *	LOCKING:
  *	spin_lock_irqsave(host_set lock)
+ *
+ *	RETURNS:
+ *	0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
+ *	needs to be deferred.
  */
-
-static void ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
-			       void (*done)(struct scsi_cmnd *),
-			       ata_xlat_func_t xlat_func)
+static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
+			      void (*done)(struct scsi_cmnd *),
+			      ata_xlat_func_t xlat_func)
 {
 	struct ata_queued_cmd *qc;
 	u8 *scsicmd = cmd->cmnd;
@@ -1290,13 +1293,13 @@ static void ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
 	ata_qc_issue(qc);
 
 	VPRINTK("EXIT\n");
-	return;
+	return 0;
 
 early_finish:
         ata_qc_free(qc);
 	done(cmd);
 	DPRINTK("EXIT - early finish (good or error)\n");
-	return;
+	return 0;
 
 err_did:
 	ata_qc_free(qc);
@@ -1304,7 +1307,7 @@ static void ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
 	cmd->result = (DID_ERROR << 16);
 	done(cmd);
 	DPRINTK("EXIT - internal\n");
-	return;
+	return 0;
 }
 
 /**
@@ -2456,20 +2459,24 @@ static inline void ata_scsi_dump_cdb(struct ata_port *ap,
 #endif
 }
 
-static inline void __ata_scsi_queuecmd(struct scsi_cmnd *cmd,
-				       void (*done)(struct scsi_cmnd *),
-				       struct ata_device *dev)
+static inline int __ata_scsi_queuecmd(struct scsi_cmnd *cmd,
+				      void (*done)(struct scsi_cmnd *),
+				      struct ata_device *dev)
 {
+	int rc = 0;
+
 	if (dev->class == ATA_DEV_ATA) {
 		ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
 							      cmd->cmnd[0]);
 
 		if (xlat_func)
-			ata_scsi_translate(dev, cmd, done, xlat_func);
+			rc = ata_scsi_translate(dev, cmd, done, xlat_func);
 		else
 			ata_scsi_simulate(dev, cmd, done);
 	} else
-		ata_scsi_translate(dev, cmd, done, atapi_xlat);
+		rc = ata_scsi_translate(dev, cmd, done, atapi_xlat);
+
+	return rc;
 }
 
 /**
@@ -2488,15 +2495,16 @@ static inline void __ata_scsi_queuecmd(struct scsi_cmnd *cmd,
  *	Releases scsi-layer-held lock, and obtains host_set lock.
  *
  *	RETURNS:
- *	Zero.
+ *	Return value from __ata_scsi_queuecmd() if @cmd can be queued,
+ *	0 otherwise.
  */
-
 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
 {
 	struct ata_port *ap;
 	struct ata_device *dev;
 	struct scsi_device *scsidev = cmd->device;
 	struct Scsi_Host *shost = scsidev->host;
+	int rc = 0;
 
 	ap = ata_shost_to_port(shost);
 
@@ -2507,7 +2515,7 @@ int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
 
 	dev = ata_scsi_find_dev(ap, scsidev);
 	if (likely(dev))
-		__ata_scsi_queuecmd(cmd, done, dev);
+		rc = __ata_scsi_queuecmd(cmd, done, dev);
 	else {
 		cmd->result = (DID_BAD_TARGET << 16);
 		done(cmd);
@@ -2515,7 +2523,7 @@ int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
 
 	spin_unlock(&ap->host_set->lock);
 	spin_lock(shost->host_lock);
-	return 0;
+	return rc;
 }
 
 /**