1 files changed, 34 insertions, 77 deletions

diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 1de30eb83bb0..45c75649b9e0 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -320,19 +320,11 @@ static int scsi_check_sense(struct scsi_cmnd *scmd)
 				    "changed. The Linux SCSI layer does not "
 				    "automatically adjust these parameters.\n");
 
-		if (scmd->request->cmd_flags & REQ_HARDBARRIER)
-			/*
-			 * barrier requests should always retry on UA
-			 * otherwise block will get a spurious error
-			 */
-			return NEEDS_RETRY;
-		else
-			/*
-			 * for normal (non barrier) commands, pass the
-			 * UA upwards for a determination in the
-			 * completion functions
-			 */
-			return SUCCESS;
+		/*
+		 * Pass the UA upwards for a determination in the completion
+		 * functions.
+		 */
+		return SUCCESS;
 
 		/* these three are not supported */
 	case COPY_ABORTED:
@@ -623,7 +615,7 @@ static int scsi_try_bus_device_reset(struct scsi_cmnd *scmd)
 	return rtn;
 }
 
-static int __scsi_try_to_abort_cmd(struct scsi_cmnd *scmd)
+static int scsi_try_to_abort_cmd(struct scsi_cmnd *scmd)
 {
 	if (!scmd->device->host->hostt->eh_abort_handler)
 		return FAILED;
@@ -631,31 +623,9 @@ static int __scsi_try_to_abort_cmd(struct scsi_cmnd *scmd)
 	return scmd->device->host->hostt->eh_abort_handler(scmd);
 }
 
-/**
- * scsi_try_to_abort_cmd - Ask host to abort a running command.
- * @scmd:	SCSI cmd to abort from Lower Level.
- *
- * Notes:
- *    This function will not return until the user's completion function
- *    has been called.  there is no timeout on this operation.  if the
- *    author of the low-level driver wishes this operation to be timed,
- *    they can provide this facility themselves.  helper functions in
- *    scsi_error.c can be supplied to make this easier to do.
- */
-static int scsi_try_to_abort_cmd(struct scsi_cmnd *scmd)
-{
-	/*
-	 * scsi_done was called just after the command timed out and before
-	 * we had a chance to process it. (db)
-	 */
-	if (scmd->serial_number == 0)
-		return SUCCESS;
-	return __scsi_try_to_abort_cmd(scmd);
-}
-
 static void scsi_abort_eh_cmnd(struct scsi_cmnd *scmd)
 {
-	if (__scsi_try_to_abort_cmd(scmd) != SUCCESS)
+	if (scsi_try_to_abort_cmd(scmd) != SUCCESS)
 		if (scsi_try_bus_device_reset(scmd) != SUCCESS)
 			if (scsi_try_target_reset(scmd) != SUCCESS)
 				if (scsi_try_bus_reset(scmd) != SUCCESS)
@@ -781,17 +751,15 @@ static int scsi_send_eh_cmnd(struct scsi_cmnd *scmd, unsigned char *cmnd,
 	struct Scsi_Host *shost = sdev->host;
 	DECLARE_COMPLETION_ONSTACK(done);
 	unsigned long timeleft;
-	unsigned long flags;
 	struct scsi_eh_save ses;
 	int rtn;
 
 	scsi_eh_prep_cmnd(scmd, &ses, cmnd, cmnd_size, sense_bytes);
 	shost->eh_action = &done;
 
-	spin_lock_irqsave(shost->host_lock, flags);
 	scsi_log_send(scmd);
-	shost->hostt->queuecommand(scmd, scsi_eh_done);
-	spin_unlock_irqrestore(shost->host_lock, flags);
+	scmd->scsi_done = scsi_eh_done;
+	shost->hostt->queuecommand(shost, scmd);
 
 	timeleft = wait_for_completion_timeout(&done, timeout);
 
@@ -1156,51 +1124,40 @@ static int scsi_eh_target_reset(struct Scsi_Host *shost,
 				struct list_head *work_q,
 				struct list_head *done_q)
 {
-	struct scsi_cmnd *scmd, *tgtr_scmd, *next;
-	unsigned int id = 0;
-	int rtn;
+	LIST_HEAD(tmp_list);
 
-	do {
-		tgtr_scmd = NULL;
-		list_for_each_entry(scmd, work_q, eh_entry) {
-			if (id == scmd_id(scmd)) {
-				tgtr_scmd = scmd;
-				break;
-			}
-		}
-		if (!tgtr_scmd) {
-			/* not one exactly equal; find the next highest */
-			list_for_each_entry(scmd, work_q, eh_entry) {
-				if (scmd_id(scmd) > id &&
-				    (!tgtr_scmd ||
-				     scmd_id(tgtr_scmd) > scmd_id(scmd)))
-						tgtr_scmd = scmd;
-			}
-		}
-		if (!tgtr_scmd)
-			/* no more commands, that's it */
-			break;
+	list_splice_init(work_q, &tmp_list);
+
+	while (!list_empty(&tmp_list)) {
+		struct scsi_cmnd *next, *scmd;
+		int rtn;
+		unsigned int id;
+
+		scmd = list_entry(tmp_list.next, struct scsi_cmnd, eh_entry);
+		id = scmd_id(scmd);
 
 		SCSI_LOG_ERROR_RECOVERY(3, printk("%s: Sending target reset "
 						  "to target %d\n",
 						  current->comm, id));
-		rtn = scsi_try_target_reset(tgtr_scmd);
-		if (rtn == SUCCESS || rtn == FAST_IO_FAIL) {
-			list_for_each_entry_safe(scmd, next, work_q, eh_entry) {
-				if (id == scmd_id(scmd))
-					if (!scsi_device_online(scmd->device) ||
-					    rtn == FAST_IO_FAIL ||
-					    !scsi_eh_tur(tgtr_scmd))
-						scsi_eh_finish_cmd(scmd,
-								   done_q);
-			}
-		} else
+		rtn = scsi_try_target_reset(scmd);
+		if (rtn != SUCCESS && rtn != FAST_IO_FAIL)
 			SCSI_LOG_ERROR_RECOVERY(3, printk("%s: Target reset"
 							  " failed target: "
 							  "%d\n",
 							  current->comm, id));
-		id++;
-	} while(id != 0);
+		list_for_each_entry_safe(scmd, next, &tmp_list, eh_entry) {
+			if (scmd_id(scmd) != id)
+				continue;
+
+			if ((rtn == SUCCESS || rtn == FAST_IO_FAIL)
+			    && (!scsi_device_online(scmd->device) ||
+				 rtn == FAST_IO_FAIL || !scsi_eh_tur(scmd)))
+				scsi_eh_finish_cmd(scmd, done_q);
+			else
+				/* push back on work queue for further processing */
+				list_move(&scmd->eh_entry, work_q);
+		}
+	}
 
 	return list_empty(work_q);
 }