Patch "[PATCH 073/135] mpt3sas: Fix for Asynchronous completion of timedout" 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

    [PATCH 073/135] mpt3sas: Fix for Asynchronous completion of timedout

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:
     0073-mpt3sas-Fix-for-Asynchronous-completion-of-timedout-.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 6b229d64e5b93e67a6c29c5149f72236a1bfe42b Mon Sep 17 00:00:00 2001
From: Suganath prabu Subramani <suganath-prabu.subramani@avagotech.com>
Date: Thu, 28 Jan 2016 12:07:06 +0530
Subject: [PATCH 073/135] mpt3sas: Fix for Asynchronous completion of timedout
 IO and task abort of timedout IO.

[ Upstream commit 03d1fb3a65783979f23bd58b5a0387e6992d9e26 ]

Track msix of each IO and use the same msix for issuing abort to timed
out IO. With this driver will process IO's reply first followed by TM.

Signed-off-by: Suganath prabu Subramani <suganath-prabu.subramani@avagotech.com>
Signed-off-by: Chaitra P B <chaitra.basappa@avagotech.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/mpt3sas/mpt3sas_base.c  |   20 +++++++++++---------
 drivers/scsi/mpt3sas/mpt3sas_base.h  |    5 ++++-
 drivers/scsi/mpt3sas/mpt3sas_ctl.c   |    2 +-
 drivers/scsi/mpt3sas/mpt3sas_scsih.c |   12 +++++++++---
 4 files changed, 25 insertions(+), 14 deletions(-)

--- a/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
@@ -2242,6 +2242,12 @@ mpt3sas_base_get_reply_virt_addr(struct
 	return ioc->reply + (phys_addr - (u32)ioc->reply_dma);
 }
 
+static inline u8
+_base_get_msix_index(struct MPT3SAS_ADAPTER *ioc)
+{
+	return ioc->cpu_msix_table[raw_smp_processor_id()];
+}
+
 /**
  * mpt3sas_base_get_smid - obtain a free smid from internal queue
  * @ioc: per adapter object
@@ -2302,6 +2308,7 @@ mpt3sas_base_get_smid_scsiio(struct MPT3
 	request->scmd = scmd;
 	request->cb_idx = cb_idx;
 	smid = request->smid;
+	request->msix_io = _base_get_msix_index(ioc);
 	list_del(&request->tracker_list);
 	spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
 	return smid;
@@ -2424,12 +2431,6 @@ _base_writeq(__u64 b, volatile void __io
 }
 #endif
 
-static inline u8
-_base_get_msix_index(struct MPT3SAS_ADAPTER *ioc)
-{
-	return ioc->cpu_msix_table[raw_smp_processor_id()];
-}
-
 /**
  * mpt3sas_base_put_smid_scsi_io - send SCSI_IO request to firmware
  * @ioc: per adapter object
@@ -2483,18 +2484,19 @@ mpt3sas_base_put_smid_fast_path(struct M
  * mpt3sas_base_put_smid_hi_priority - send Task Managment request to firmware
  * @ioc: per adapter object
  * @smid: system request message index
- *
+ * @msix_task: msix_task will be same as msix of IO incase of task abort else 0.
  * Return nothing.
  */
 void
-mpt3sas_base_put_smid_hi_priority(struct MPT3SAS_ADAPTER *ioc, u16 smid)
+mpt3sas_base_put_smid_hi_priority(struct MPT3SAS_ADAPTER *ioc, u16 smid,
+	u16 msix_task)
 {
 	Mpi2RequestDescriptorUnion_t descriptor;
 	u64 *request = (u64 *)&descriptor;
 
 	descriptor.HighPriority.RequestFlags =
 	    MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY;
-	descriptor.HighPriority.MSIxIndex =  0;
+	descriptor.HighPriority.MSIxIndex =  msix_task;
 	descriptor.HighPriority.SMID = cpu_to_le16(smid);
 	descriptor.HighPriority.LMID = 0;
 	descriptor.HighPriority.Reserved1 = 0;
--- a/drivers/scsi/mpt3sas/mpt3sas_base.h
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.h
@@ -643,6 +643,7 @@ struct chain_tracker {
  * @cb_idx: callback index
  * @direct_io: To indicate whether I/O is direct (WARPDRIVE)
  * @tracker_list: list of free request (ioc->free_list)
+ * @msix_io: IO's msix
  */
 struct scsiio_tracker {
 	u16	smid;
@@ -651,6 +652,7 @@ struct scsiio_tracker {
 	u8	direct_io;
 	struct list_head chain_list;
 	struct list_head tracker_list;
+	u16     msix_io;
 };
 
 /**
@@ -1213,7 +1215,8 @@ void mpt3sas_base_put_smid_scsi_io(struc
 	u16 handle);
 void mpt3sas_base_put_smid_fast_path(struct MPT3SAS_ADAPTER *ioc, u16 smid,
 	u16 handle);
-void mpt3sas_base_put_smid_hi_priority(struct MPT3SAS_ADAPTER *ioc, u16 smid);
+void mpt3sas_base_put_smid_hi_priority(struct MPT3SAS_ADAPTER *ioc,
+	u16 smid, u16 msix_task);
 void mpt3sas_base_put_smid_default(struct MPT3SAS_ADAPTER *ioc, u16 smid);
 void mpt3sas_base_initialize_callback_handler(void);
 u8 mpt3sas_base_register_callback_handler(MPT_CALLBACK cb_func);
--- a/drivers/scsi/mpt3sas/mpt3sas_ctl.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_ctl.c
@@ -817,7 +817,7 @@ _ctl_do_mpt_command(struct MPT3SAS_ADAPT
 		    tm_request->DevHandle));
 		ioc->build_sg_mpi(ioc, psge, data_out_dma, data_out_sz,
 		    data_in_dma, data_in_sz);
-		mpt3sas_base_put_smid_hi_priority(ioc, smid);
+		mpt3sas_base_put_smid_hi_priority(ioc, smid, 0);
 		break;
 	}
 	case MPI2_FUNCTION_SMP_PASSTHROUGH:
--- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
@@ -2193,6 +2193,7 @@ mpt3sas_scsih_issue_tm(struct MPT3SAS_AD
 	unsigned long timeleft;
 	struct scsiio_tracker *scsi_lookup = NULL;
 	int rc;
+	u16 msix_task = 0;
 
 	if (m_type == TM_MUTEX_ON)
 		mutex_lock(&ioc->tm_cmds.mutex);
@@ -2256,7 +2257,12 @@ mpt3sas_scsih_issue_tm(struct MPT3SAS_AD
 	int_to_scsilun(lun, (struct scsi_lun *)mpi_request->LUN);
 	mpt3sas_scsih_set_tm_flag(ioc, handle);
 	init_completion(&ioc->tm_cmds.done);
-	mpt3sas_base_put_smid_hi_priority(ioc, smid);
+	if ((type == MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK) &&
+			(scsi_lookup->msix_io < ioc->reply_queue_count))
+		msix_task = scsi_lookup->msix_io;
+	else
+		msix_task = 0;
+	mpt3sas_base_put_smid_hi_priority(ioc, smid, msix_task);
 	timeleft = wait_for_completion_timeout(&ioc->tm_cmds.done, timeout*HZ);
 	if (!(ioc->tm_cmds.status & MPT3_CMD_COMPLETE)) {
 		pr_err(MPT3SAS_FMT "%s: timeout\n",
@@ -3151,7 +3157,7 @@ _scsih_tm_tr_send(struct MPT3SAS_ADAPTER
 	mpi_request->Function = MPI2_FUNCTION_SCSI_TASK_MGMT;
 	mpi_request->DevHandle = cpu_to_le16(handle);
 	mpi_request->TaskType = MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET;
-	mpt3sas_base_put_smid_hi_priority(ioc, smid);
+	mpt3sas_base_put_smid_hi_priority(ioc, smid, 0);
 	mpt3sas_trigger_master(ioc, MASTER_TRIGGER_DEVICE_REMOVAL);
 
 out:
@@ -3332,7 +3338,7 @@ _scsih_tm_tr_volume_send(struct MPT3SAS_
 	mpi_request->Function = MPI2_FUNCTION_SCSI_TASK_MGMT;
 	mpi_request->DevHandle = cpu_to_le16(handle);
 	mpi_request->TaskType = MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET;
-	mpt3sas_base_put_smid_hi_priority(ioc, smid);
+	mpt3sas_base_put_smid_hi_priority(ioc, smid, 0);
 }
 
 /**


Patches currently in stable-queue which might be from suganath-prabu.subramani@avagotech.com are

queue-4.4/0073-mpt3sas-Fix-for-Asynchronous-completion-of-timedout-.patch