Patch "scsi: megaraid_sas: Do not set fp_possible if TM capable for non-RW syspdIO, change fp_possible to bool" has been added to the 4.9-stable tree

Patch "scsi: megaraid_sas: Do not set fp_possible if TM capable for non-RW syspdIO, change fp_possible to bool" has been added to the 4.9-stable tree

[gregkh]

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

    scsi: megaraid_sas: Do not set fp_possible if TM capable for non-RW syspdIO, change fp_possible to bool

to the 4.9-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-do-not-set-fp_possible-if-tm-capable-for-non-rw-syspdio-change-fp_possible-to-bool.patch
and it can be found in the queue-4.9 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 foo@baz Mon Nov  6 10:07:35 CET 2017
From: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Date: Sat, 7 Oct 2017 22:36:47 +0000
Subject: scsi: megaraid_sas: Do not set fp_possible if TM capable for non-RW syspdIO, change fp_possible to bool

From: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>


[ Upstream commit 1d6dbd1752fb4347a4a5db06c8f5cd35dd1919f4 ]

FIX - firmware wants non-RW SYS PD IOs to avoid FastPath for better
tracking and other functionalities if the device is task management
capable.

Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/scsi/megaraid/megaraid_sas_fusion.c |   15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -1960,7 +1960,8 @@ static void megasas_build_ld_nonrw_fusio
  */
 static void
 megasas_build_syspd_fusion(struct megasas_instance *instance,
-	struct scsi_cmnd *scmd, struct megasas_cmd_fusion *cmd, u8 fp_possible)
+	struct scsi_cmnd *scmd, struct megasas_cmd_fusion *cmd,
+	bool fp_possible)
 {
 	u32 device_id;
 	struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
@@ -2064,6 +2065,8 @@ megasas_build_io_fusion(struct megasas_i
 	u16 sge_count;
 	u8  cmd_type;
 	struct MPI2_RAID_SCSI_IO_REQUEST *io_request = cmd->io_request;
+	struct MR_PRIV_DEVICE *mr_device_priv_data;
+	mr_device_priv_data = scp->device->hostdata;
 
 	/* Zero out some fields so they don't get reused */
 	memset(io_request->LUN, 0x0, 8);
@@ -2092,12 +2095,14 @@ megasas_build_io_fusion(struct megasas_i
 		megasas_build_ld_nonrw_fusion(instance, scp, cmd);
 		break;
 	case READ_WRITE_SYSPDIO:
+		megasas_build_syspd_fusion(instance, scp, cmd, true);
+		break;
 	case NON_READ_WRITE_SYSPDIO:
-		if (instance->secure_jbod_support &&
-			(cmd_type == NON_READ_WRITE_SYSPDIO))
-			megasas_build_syspd_fusion(instance, scp, cmd, 0);
+		if (instance->secure_jbod_support ||
+		    mr_device_priv_data->is_tm_capable)
+			megasas_build_syspd_fusion(instance, scp, cmd, false);
 		else
-			megasas_build_syspd_fusion(instance, scp, cmd, 1);
+			megasas_build_syspd_fusion(instance, scp, cmd, true);
 		break;
 	default:
 		break;


Patches currently in stable-queue which might be from shivasharan.srikanteshwara@broadcom.com are

queue-4.9/scsi-megaraid_sas-do-not-set-fp_possible-if-tm-capable-for-non-rw-syspdio-change-fp_possible-to-bool.patch