Patch "mtip32xx: Avoid issuing standby immediate cmd during FTL rebuild" has been added to the 4.4-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    mtip32xx: Avoid issuing standby immediate cmd during FTL rebuild

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     mtip32xx-avoid-issuing-standby-immediate-cmd-during-ftl-rebuild.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From d8a18d2d8f5de55666c6011ed175939d22c8e3d8 Mon Sep 17 00:00:00 2001
From: Asai Thambi SP <asamymuthupa@micron.com>
Date: Wed, 24 Feb 2016 21:17:32 -0800
Subject: mtip32xx: Avoid issuing standby immediate cmd during FTL rebuild

From: Asai Thambi SP <asamymuthupa@micron.com>

commit d8a18d2d8f5de55666c6011ed175939d22c8e3d8 upstream.

Prevent standby immediate command from being issued in remove,
suspend and shutdown paths, while drive is in FTL rebuild process.

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>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/block/mtip32xx/mtip32xx.c |   20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -3270,20 +3270,25 @@ out1:
 	return rv;
 }
 
-static void mtip_standby_drive(struct driver_data *dd)
+static int mtip_standby_drive(struct driver_data *dd)
 {
-	if (dd->sr)
-		return;
+	int rv = 0;
 
+	if (dd->sr || !dd->port)
+		return -ENODEV;
 	/*
 	 * Send standby immediate (E0h) to the drive so that it
 	 * saves its state.
 	 */
 	if (!test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags) &&
-	    !test_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag))
-		if (mtip_standby_immediate(dd->port))
+	    !test_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag) &&
+	    !test_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag)) {
+		rv = mtip_standby_immediate(dd->port);
+		if (rv)
 			dev_warn(&dd->pdev->dev,
 				"STANDBY IMMEDIATE failed\n");
+	}
+	return rv;
 }
 
 /*
@@ -3341,8 +3346,7 @@ static int mtip_hw_shutdown(struct drive
 	 * Send standby immediate (E0h) to the drive so that it
 	 * saves its state.
 	 */
-	if (!dd->sr && dd->port)
-		mtip_standby_immediate(dd->port);
+	mtip_standby_drive(dd);
 
 	return 0;
 }
@@ -3365,7 +3369,7 @@ static int mtip_hw_suspend(struct driver
 	 * Send standby immediate (E0h) to the drive
 	 * so that it saves its state.
 	 */
-	if (mtip_standby_immediate(dd->port) != 0) {
+	if (mtip_standby_drive(dd) != 0) {
 		dev_err(&dd->pdev->dev,
 			"Failed standby-immediate command\n");
 		return -EFAULT;


Patches currently in stable-queue which might be from asamymuthupa@micron.com are

queue-4.4/mtip32xx-print-exact-time-when-an-internal-command-is-interrupted.patch
queue-4.4/mtip32xx-implement-timeout-handler.patch
queue-4.4/mtip32xx-cleanup-queued-requests-after-surprise-removal.patch
queue-4.4/mtip32xx-avoid-issuing-standby-immediate-cmd-during-ftl-rebuild.patch
queue-4.4/mtip32xx-handle-safe-removal-during-io.patch
queue-4.4/mtip32xx-remove-unwanted-code-from-taskfile-error-handler.patch
queue-4.4/mtip32xx-handle-ftl-rebuild-failure-state-during-device-initialization.patch
queue-4.4/mtip32xx-fix-for-rmmod-crash-when-drive-is-in-ftl-rebuild.patch
queue-4.4/mtip32xx-fix-broken-service-thread-handling.patch