From: Hannes Reinecke <hare@suse.de>
Date: Fri, 25 Aug 2017 13:57:03 +0200
Subject: [PATCH] scsi: bfa: move bus reset to target reset
Git-commit: 1b7092f35e0928857f5487c62ca9669218f6b1b0
Patch-mainline: v4.14-rc1
References: bsc#1104967,FATE#325924

The bus reset handler is just calling target reset on all targets, which
is exactly what SCSI EH will be doing anyway.  So move the bus reset
function to target reset and drop the loop.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Hannes Reinecke <hare@suse.com>
---
 drivers/scsi/bfa/bfad_im.c | 37 +++++++++++++++----------------------
 1 file changed, 15 insertions(+), 22 deletions(-)

diff --git a/drivers/scsi/bfa/bfad_im.c b/drivers/scsi/bfa/bfad_im.c
index 7eb0eef18fdd..24e657a4ec80 100644
--- a/drivers/scsi/bfa/bfad_im.c
+++ b/drivers/scsi/bfa/bfad_im.c
@@ -373,32 +373,28 @@ bfad_im_reset_lun_handler(struct scsi_cmnd *cmnd)
 }
 
 /*
- * Scsi_Host template entry, resets the bus and abort all commands.
+ * Scsi_Host template entry, resets the target and abort all commands.
  */
 static int
-bfad_im_reset_bus_handler(struct scsi_cmnd *cmnd)
+bfad_im_reset_target_handler(struct scsi_cmnd *cmnd)
 {
 	struct Scsi_Host *shost = cmnd->device->host;
+	struct scsi_target *starget = scsi_target(cmnd->device);
 	struct bfad_im_port_s *im_port =
 				(struct bfad_im_port_s *) shost->hostdata[0];
 	struct bfad_s         *bfad = im_port->bfad;
 	struct bfad_itnim_s   *itnim;
 	unsigned long   flags;
-	u32        i, rc, err_cnt = 0;
+	u32        rc, rtn = FAILED;
 	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
 	enum bfi_tskim_status task_status;
 
 	spin_lock_irqsave(&bfad->bfad_lock, flags);
-	for (i = 0; i < MAX_FCP_TARGET; i++) {
-		itnim = bfad_get_itnim(im_port, i);
-		if (itnim) {
-			cmnd->SCp.ptr = (char *)&wq;
-			rc = bfad_im_target_reset_send(bfad, cmnd, itnim);
-			if (rc != BFA_STATUS_OK) {
-				err_cnt++;
-				continue;
-			}
-
+	itnim = bfad_get_itnim(im_port, starget->id);
+	if (itnim) {
+		cmnd->SCp.ptr = (char *)&wq;
+		rc = bfad_im_target_reset_send(bfad, cmnd, itnim);
+		if (rc == BFA_STATUS_OK) {
 			/* wait target reset to complete */
 			spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 			wait_event(wq, test_bit(IO_DONE_BIT,
@@ -406,20 +402,17 @@ bfad_im_reset_bus_handler(struct scsi_cmnd *cmnd)
 			spin_lock_irqsave(&bfad->bfad_lock, flags);
 
 			task_status = cmnd->SCp.Status >> 1;
-			if (task_status != BFI_TSKIM_STS_OK) {
+			if (task_status != BFI_TSKIM_STS_OK)
 				BFA_LOG(KERN_ERR, bfad, bfa_log_level,
 					"target reset failure,"
 					" status: %d\n", task_status);
-				err_cnt++;
-			}
+			else
+				rtn = SUCCESS;
 		}
 	}
 	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 
-	if (err_cnt)
-		return FAILED;
-
-	return SUCCESS;
+	return rtn;
 }
 
 /*
@@ -816,7 +809,7 @@ struct scsi_host_template bfad_im_scsi_host_template = {
 	.eh_timed_out = fc_eh_timed_out,
 	.eh_abort_handler = bfad_im_abort_handler,
 	.eh_device_reset_handler = bfad_im_reset_lun_handler,
-	.eh_bus_reset_handler = bfad_im_reset_bus_handler,
+	.eh_target_reset_handler = bfad_im_reset_target_handler,
 
 	.slave_alloc = bfad_im_slave_alloc,
 	.slave_configure = bfad_im_slave_configure,
@@ -839,7 +832,7 @@ struct scsi_host_template bfad_im_vport_template = {
 	.eh_timed_out = fc_eh_timed_out,
 	.eh_abort_handler = bfad_im_abort_handler,
 	.eh_device_reset_handler = bfad_im_reset_lun_handler,
-	.eh_bus_reset_handler = bfad_im_reset_bus_handler,
+	.eh_target_reset_handler = bfad_im_reset_target_handler,
 
 	.slave_alloc = bfad_im_slave_alloc,
 	.slave_configure = bfad_im_slave_configure,
-- 
2.16.4