[3.13.y-ckt stable] Patch "Revert "[SCSI] mpt2sas: Remove phys on topology change."" has been added to staging queue

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    Revert "[SCSI] mpt2sas: Remove phys on topology change."

to the linux-3.13.y-queue branch of the 3.13.y-ckt extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.13.y-queue

This patch is scheduled to be released in version 3.13.11-ckt15.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.13.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

------

>From d8e10d5407cc1f4eab4f5f294240208196bffc91 Mon Sep 17 00:00:00 2001
From: Sreekanth Reddy <sreekanth.reddy at avagotech.com>
Date: Tue, 2 Dec 2014 20:58:46 +0530
Subject: Revert "[SCSI] mpt2sas: Remove phys on topology change."

commit 81a89c2d891b78695aa7e4cc0d5a7427785ae078 upstream.

This reverts commit 3520f9c779bed098ca76dd3fb6377264301d57ed
("mpt2sas: Remove phys on topology change")

Reverting the previous mpt2sas drives patch changes,
since we will observe below issue

Issue:
Drives connected Enclosure/Expander will unregister with
SCSI Transport Layer, if any one remove and add expander
cable with in DMD (Device Missing Delay) time period or
even any one power-off and power-on the Enclosure with in
the DMD period.

Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy at avagotech.com>
Reviewed-by: Tomas Henzl <thenzl at redhat.com>
Signed-off-by: Christoph Hellwig <hch at lst.de>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/scsi/mpt2sas/mpt2sas_transport.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/scsi/mpt2sas/mpt2sas_transport.c b/drivers/scsi/mpt2sas/mpt2sas_transport.c
index 9d26637..396d78e 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_transport.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_transport.c
@@ -1006,12 +1006,9 @@ mpt2sas_transport_update_links(struct MPT2SAS_ADAPTER *ioc,
 		    &mpt2sas_phy->remote_identify);
 		_transport_add_phy_to_an_existing_port(ioc, sas_node,
 		    mpt2sas_phy, mpt2sas_phy->remote_identify.sas_address);
-	} else {
+	} else
 		memset(&mpt2sas_phy->remote_identify, 0 , sizeof(struct
 		    sas_identify));
-		_transport_del_phy_from_an_existing_port(ioc, sas_node,
-		    mpt2sas_phy);
-	}

 	if (mpt2sas_phy->phy)
 		mpt2sas_phy->phy->negotiated_linkrate =
--
1.9.1