Patch "scsi: mpt3sas: Fix for block device of raid exists even after deleting raid disk" has been added to the 4.8-stable tree

Patch "scsi: mpt3sas: Fix for block device of raid exists even after deleting raid disk" has been added to the 4.8-stable tree

[gregkh]

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

    scsi: mpt3sas: Fix for block device of raid exists even after deleting raid disk

to the 4.8-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:
     scsi-mpt3sas-fix-for-block-device-of-raid-exists-even-after-deleting-raid-disk.patch
and it can be found in the queue-4.8 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 6d3a56ed098566bc83d6c2afa74b4199c12ea074 Mon Sep 17 00:00:00 2001
From: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Date: Fri, 28 Oct 2016 10:09:12 +0530
Subject: scsi: mpt3sas: Fix for block device of raid exists even after deleting raid disk

From: Sreekanth Reddy <sreekanth.reddy@broadcom.com>

commit 6d3a56ed098566bc83d6c2afa74b4199c12ea074 upstream.

While merging mpt3sas & mpt2sas code, we added the is_warpdrive check
condition on the wrong line

---------------------------------------------------------------------------
 scsih_target_alloc(struct scsi_target *starget)
                        sas_target_priv_data->handle = raid_device->handle;
                        sas_target_priv_data->sas_address = raid_device->wwid;
                        sas_target_priv_data->flags |= MPT_TARGET_FLAGS_VOLUME;
-                       raid_device->starget = starget;
+                       sas_target_priv_data->raid_device = raid_device;
+                       if (ioc->is_warpdrive)
+                               raid_device->starget = starget;
                }
                spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
                return 0;
------------------------------------------------------------------------------

That check should be for the line sas_target_priv_data->raid_device =
raid_device;

Due to above hunk, we are not initializing raid_device's starget for
raid volumes, and so during raid disk deletion driver is not calling
scsi_remove_target() API as driver observes starget field of
raid_device's structure as NULL.

Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@broadcom.com>
Fixes: 7786ab6aff9 ("mpt3sas: Ported WarpDrive product SSS6200 support")
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/scsi/mpt3sas/mpt3sas_scsih.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
@@ -1273,9 +1273,9 @@ scsih_target_alloc(struct scsi_target *s
 			sas_target_priv_data->handle = raid_device->handle;
 			sas_target_priv_data->sas_address = raid_device->wwid;
 			sas_target_priv_data->flags |= MPT_TARGET_FLAGS_VOLUME;
-			sas_target_priv_data->raid_device = raid_device;
 			if (ioc->is_warpdrive)
-				raid_device->starget = starget;
+				sas_target_priv_data->raid_device = raid_device;
+			raid_device->starget = starget;
 		}
 		spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
 		return 0;


Patches currently in stable-queue which might be from sreekanth.reddy@broadcom.com are

queue-4.8/scsi-mpt3sas-fix-for-block-device-of-raid-exists-even-after-deleting-raid-disk.patch