From: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Date: Wed, 10 May 2017 09:39:46 -0700
Subject: scsi: aacraid: Rework SOFT reset code
Patch-mainline: v4.13-rc1
Git-commit: 77cb6d5ea6033e5d477947aa682728959d6c3f8f
References: FATE#322889, bsc#1049519

Now the driver issues a soft reset and waits for the controller to be up
and running by periodically checking on the status of the controller
health registers. Also prevents ARC adapters from issuing soft reset if
IOP resets failed.

Signed-off-by: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Reviewed-by: David Carroll <david.carroll@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
---
 drivers/scsi/aacraid/src.c | 38 ++++++++++++++++++--------------------
 1 file changed, 18 insertions(+), 20 deletions(-)

diff --git a/drivers/scsi/aacraid/src.c b/drivers/scsi/aacraid/src.c
index cde4160c3e47..9ad60d63586d 100644
--- a/drivers/scsi/aacraid/src.c
+++ b/drivers/scsi/aacraid/src.c
@@ -754,8 +754,8 @@ static void aac_send_hardware_soft_reset(struct aac_dev *dev)
 
 static int aac_src_restart_adapter(struct aac_dev *dev, int bled, u8 reset_type)
 {
-	unsigned long status, start;
 	bool is_ctrl_up;
+	int ret = 0;
 
 	if (bled < 0)
 		goto invalid_out;
@@ -785,24 +785,21 @@ static int aac_src_restart_adapter(struct aac_dev *dev, int bled, u8 reset_type)
 		else
 			goto set_startup;
 
-		/*
-		 * Check to see if KERNEL_UP_AND_RUNNING
-		 * Wait for the adapter to be up and running.
-		 * If !KERNEL_UP_AND_RUNNING issue HW Soft Reset
-		 */
-		status = src_readl(dev, MUnit.OMR);
-		if (dev->sa_firmware
-		 && !(status & KERNEL_UP_AND_RUNNING)) {
-			start = jiffies;
-			do {
-				status = src_readl(dev, MUnit.OMR);
-				if (time_after(jiffies,
-				 start+HZ*SOFT_RESET_TIME)) {
-					aac_send_hardware_soft_reset(dev);
-					start = jiffies;
-				}
-			} while (!(status & KERNEL_UP_AND_RUNNING));
+		if (!dev->sa_firmware) {
+			ret = -ENODEV;
+			goto out;
 		}
+
+		aac_send_hardware_soft_reset(dev);
+		dev->msi_enabled = 0;
+
+		is_ctrl_up = aac_is_ctrl_up_and_running(dev);
+		if (!is_ctrl_up) {
+			dev_err(&dev->pdev->dev, "SOFT reset failed\n");
+			ret = -ENODEV;
+			goto out;
+		}
+
 		break;
 	case HW_SOFT_RESET:
 		if (dev->sa_firmware) {
@@ -818,13 +815,14 @@ static int aac_src_restart_adapter(struct aac_dev *dev, int bled, u8 reset_type)
 invalid_out:
 
 	if (src_readl(dev, MUnit.OMR) & KERNEL_PANIC)
-		return -ENODEV;
+		ret = -ENODEV;
 
 set_startup:
 	if (startup_timeout < 300)
 		startup_timeout = 300;
 
-	return 0;
+out:
+	return ret;
 }
 
 /**
-- 
2.12.3