From: Asai Thambi SP <asamymuthupa@micron.com>
Date: Thu, 25 Feb 2016 05:18:20 +0000 (-0800)
Subject: mtip32xx: Handle FTL rebuild failure state during device initialization
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=aae4a033868c496adae86fc6f9c3e0c405bbf360;p=linux-beck.git

mtip32xx: Handle FTL rebuild failure state during device initialization

Allow device initialization to finish gracefully when it is in
FTL rebuild failure state. Also, recover device out of this state
after successfully secure erasing it.

Signed-off-by: Selvan Mani <smani@micron.com>
Signed-off-by: Vignesh Gunasekaran <vgunasekaran@micron.com>
Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>
---

diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index 6268ea006354..a64da08ccd3e 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -699,7 +699,7 @@ static void mtip_handle_tfe(struct driver_data *dd)
 			fail_reason = "thermal shutdown";
 		}
 		if (buf[288] == 0xBF) {
-			set_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag);
+			set_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag);
 			dev_info(&dd->pdev->dev,
 				"Drive indicates rebuild has failed. Secure erase required.\n");
 			fail_all_ncq_cmds = 1;
@@ -1000,6 +1000,7 @@ static bool mtip_pause_ncq(struct mtip_port *port,
 			(fis->features == 0x27 || fis->features == 0x72 ||
 			 fis->features == 0x62 || fis->features == 0x26))) {
 		clear_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
+		clear_bit(MTIP_DDF_REBUILD_FAILED_BIT, &port->dd->dd_flag);
 		/* Com reset after secure erase or lowlevel format */
 		mtip_restart_port(port);
 		clear_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags);
@@ -1166,6 +1167,7 @@ static int mtip_exec_internal_command(struct mtip_port *port,
 		if ((rv = wait_for_completion_interruptible_timeout(
 				&wait,
 				msecs_to_jiffies(timeout))) <= 0) {
+
 			if (rv == -ERESTARTSYS) { /* interrupted */
 				dev_err(&dd->pdev->dev,
 					"Internal command [%02X] was interrupted after %u ms\n",
@@ -3084,7 +3086,7 @@ static int mtip_hw_get_identify(struct driver_data *dd)
 		if (buf[288] == 0xBF) {
 			dev_info(&dd->pdev->dev,
 				"Drive indicates rebuild has failed.\n");
-			/* TODO */
+			set_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag);
 		}
 	}
 
@@ -3687,10 +3689,9 @@ static int mtip_submit_request(struct blk_mq_hw_ctx *hctx, struct request *rq)
 				rq_data_dir(rq))) {
 			return -ENODATA;
 		}
-		if (unlikely(test_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag)))
+		if (unlikely(test_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag) ||
+			test_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag)))
 			return -ENODATA;
-		if (test_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag))
-			return -ENXIO;
 	}
 
 	if (rq->cmd_flags & REQ_DISCARD) {