[PATCH 08/16] ibmvfc: open-code reset loop for target reset

[Hannes Reinecke <hare@xxxxxxx>]

From: Hannes Reinecke <hare@xxxxxxxx>

For target reset we need a device to send the target reset to,
so open-code the loop in target reset to send the target reset TMF
to the correct device.

Signed-off-by: Hannes Reinecke <hare@xxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@xxxxxxx>
Cc: Tyrel Datwyler <tyreld@xxxxxxxxxxxxx>
---
 drivers/scsi/ibmvscsi/ibmvfc.c | 41 ++++++++++++++++++----------------
 1 file changed, 22 insertions(+), 19 deletions(-)

diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index d0eab5700dc5..1287153ec053 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -2925,18 +2925,6 @@ static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data)
 	*rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS);
 }
 
-/**
- * ibmvfc_dev_cancel_all_reset - Device iterated cancel all function
- * @sdev:	scsi device struct
- * @data:	return code
- *
- **/
-static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data)
-{
-	unsigned long *rc = data;
-	*rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET);
-}
-
 /**
  * ibmvfc_eh_target_reset_handler - Reset the target
  * @cmd:	scsi command struct
@@ -2946,22 +2934,37 @@ static void ibmvfc_dev_cancel_all_reset(struct scsi_device *sdev, void *data)
  **/
 static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd)
 {
-	struct scsi_device *sdev = cmd->device;
-	struct ibmvfc_host *vhost = shost_priv(sdev->host);
-	struct scsi_target *starget = scsi_target(sdev);
+	struct scsi_target *starget = scsi_target(cmd->device);
+	struct fc_rport *rport = starget_to_rport(starget);
+	struct Scsi_Host *shost = rport_to_shost(rport);
+	struct ibmvfc_host *vhost = shost_priv(shost);
 	int block_rc;
 	int reset_rc = 0;
 	int rc = FAILED;
 	unsigned long cancel_rc = 0;
 
 	ENTER;
-	block_rc = fc_block_scsi_eh(cmd);
+	block_rc = fc_block_rport(rport);
 	ibmvfc_wait_while_resetting(vhost);
 	if (block_rc != FAST_IO_FAIL) {
-		starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_reset);
-		reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target");
+		struct scsi_device *sdev, *reset_sdev = NULL;
+
+		shost_for_each_device(sdev, shost) {
+			if ((sdev->channel != starget->channel) ||
+			    (sdev->id != starget->id))
+				continue;
+
+			cancel_rc |= ibmvfc_cancel_all(sdev,
+						       IBMVFC_TMF_TGT_RESET);
+			if (!reset_sdev)
+				reset_sdev = sdev;
+		}
+		if (reset_sdev)
+			reset_rc = ibmvfc_reset_device(reset_sdev,
+					IBMVFC_TARGET_RESET, "target");
 	} else
-		starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset);
+		starget_for_each_device(starget, &cancel_rc,
+					ibmvfc_dev_cancel_all_noreset);
 
 	if (!cancel_rc && !reset_rc)
 		rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target);
-- 
2.29.2