Patch "scsi: megaraid_sas: fix macro MEGASAS_IS_LOGICAL to avoid regression" has been added to the 4.8-stable tree

Patch "scsi: megaraid_sas: fix macro MEGASAS_IS_LOGICAL to avoid regression" 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: megaraid_sas: fix macro MEGASAS_IS_LOGICAL to avoid regression

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-megaraid_sas-fix-macro-megasas_is_logical-to-avoid-regression.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 5e5ec1759dd663a1d5a2f10930224dd009e500e8 Mon Sep 17 00:00:00 2001
From: Sumit Saxena <sumit.saxena@broadcom.com>
Date: Wed, 9 Nov 2016 02:59:42 -0800
Subject: scsi: megaraid_sas: fix macro MEGASAS_IS_LOGICAL to avoid regression

From: Sumit Saxena <sumit.saxena@broadcom.com>

commit 5e5ec1759dd663a1d5a2f10930224dd009e500e8 upstream.

This patch will fix regression caused by commit 1e793f6fc0db ("scsi:
megaraid_sas: Fix data integrity failure for JBOD (passthrough)
devices").

The problem was that the MEGASAS_IS_LOGICAL macro did not have braces
and as a result the driver ended up exposing a lot of non-existing SCSI
devices (all SCSI commands to channels 1,2,3 were returned as
SUCCESS-DID_OK by driver).

[mkp: clarified patch description]

Fixes: 1e793f6fc0db920400574211c48f9157a37e3945
Reported-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Sumit Saxena <sumit.saxena@broadcom.com>
Tested-by: Sumit Saxena <sumit.saxena@broadcom.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Tested-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/scsi/megaraid/megaraid_sas.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/scsi/megaraid/megaraid_sas.h
+++ b/drivers/scsi/megaraid/megaraid_sas.h
@@ -2233,7 +2233,7 @@ struct megasas_instance_template {
 };
 
 #define MEGASAS_IS_LOGICAL(scp)						\
-	(scp->device->channel < MEGASAS_MAX_PD_CHANNELS) ? 0 : 1
+	((scp->device->channel < MEGASAS_MAX_PD_CHANNELS) ? 0 : 1)
 
 #define MEGASAS_DEV_INDEX(scp)						\
 	(((scp->device->channel % 2) * MEGASAS_MAX_DEV_PER_CHANNEL) +	\


Patches currently in stable-queue which might be from sumit.saxena@broadcom.com are

queue-4.8/scsi-megaraid_sas-fix-macro-megasas_is_logical-to-avoid-regression.patch
queue-4.8/scsi-megaraid_sas-fix-data-integrity-failure-for-jbod-passthrough-devices.patch