[PATCH 16/16] megaraid: pass in NULL scb for host reset

[Hannes Reinecke <hare@xxxxxxx>]

When calling a host reset we shouldn't rely on the command triggering
the reset, so allow megaraid_abort_and_reset() to be called with a
NULL scb.
And drop the pointless 'bus_reset' and 'target_reset' handlers, which
just call the same function as host_reset.

Signed-off-by: Hannes Reinecke <hare@xxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@xxxxxxx>
---
 drivers/scsi/megaraid.c | 42 ++++++++++++++++-------------------------
 1 file changed, 16 insertions(+), 26 deletions(-)

diff --git a/drivers/scsi/megaraid.c b/drivers/scsi/megaraid.c
index a5d8cee2d510..9484632ffed6 100644
--- a/drivers/scsi/megaraid.c
+++ b/drivers/scsi/megaraid.c
@@ -1897,7 +1897,7 @@ megaraid_reset(struct scsi_cmnd *cmd)
 
 	spin_lock_irq(&adapter->lock);
 
-	rval =  megaraid_abort_and_reset(adapter, cmd, SCB_RESET);
+	rval =  megaraid_abort_and_reset(adapter, NULL, SCB_RESET);
 
 	/*
 	 * This is required here to complete any completed requests
@@ -1936,7 +1936,7 @@ megaraid_abort_and_reset(adapter_t *adapter, struct scsi_cmnd *cmd, int aor)
 
 		scb = list_entry(pos, scb_t, list);
 
-		if (scb->cmd == cmd) { /* Found command */
+		if (!cmd || scb->cmd == cmd) { /* Found command */
 
 			scb->state |= aor;
 
@@ -1955,31 +1955,23 @@ megaraid_abort_and_reset(adapter_t *adapter, struct scsi_cmnd *cmd, int aor)
 
 				return FAILED;
 			}
-			else {
-
-				/*
-				 * Not yet issued! Remove from the pending
-				 * list
-				 */
-				dev_warn(&adapter->dev->dev,
-					"%s-[%x], driver owner\n",
-					(aor==SCB_ABORT) ? "ABORTING":"RESET",
-					scb->idx);
-
-				mega_free_scb(adapter, scb);
-
-				if( aor == SCB_ABORT ) {
-					cmd->result = (DID_ABORT << 16);
-				}
-				else {
-					cmd->result = (DID_RESET << 16);
-				}
+			/*
+			 * Not yet issued! Remove from the pending
+			 * list
+			 */
+			dev_warn(&adapter->dev->dev,
+				 "%s-[%x], driver owner\n",
+				 (cmd) ? "ABORTING":"RESET",
+				 scb->idx);
+			mega_free_scb(adapter, scb);
 
+			if (cmd) {
+				cmd->result = (DID_ABORT << 16);
 				list_add_tail(SCSI_LIST(cmd),
-						&adapter->completed_list);
-
-				return SUCCESS;
+					      &adapter->completed_list);
 			}
+
+			return SUCCESS;
 		}
 	}
 
@@ -4113,8 +4105,6 @@ static struct scsi_host_template megaraid_template = {
 	.sg_tablesize			= MAX_SGLIST,
 	.cmd_per_lun			= DEF_CMD_PER_LUN,
 	.eh_abort_handler		= megaraid_abort,
-	.eh_device_reset_handler	= megaraid_reset,
-	.eh_bus_reset_handler		= megaraid_reset,
 	.eh_host_reset_handler		= megaraid_reset,
 	.no_write_same			= 1,
 	.cmd_size			= sizeof(struct megaraid_cmd_priv),
-- 
2.29.2