Patch "scsi: mpt3sas: Fix IO error occurs on pulling out a drive from RAID1 volume created on two SATA drive" has been added to the 4.9-stable tree

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

scsi: mpt3sas: Fix IO error occurs on pulling out a drive from RAID1 volume created on two SATA drive

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-mpt3sas-fix-io-error-occurs-on-pulling-out-a-drive-from-raid1-volume-created-on-two-sata-drive.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 <[email protected]> know about it.

From: Sreekanth Reddy <[email protected]>
Date: Tue, 10 Oct 2017 18:41:18 +0530
Subject: scsi: mpt3sas: Fix IO error occurs on pulling out a drive from RAID1 volume created on two SATA drive

From: Sreekanth Reddy <[email protected]>

[ Upstream commit 2ce9a3645299ba1752873d333d73f67620f4550b ]

Whenever an I/O for a RAID volume fails with IOCStatus MPI2_IOCSTATUS_SCSI_IOC_TERMINATED and SCSIStatus equal to (MPI2_SCSI_STATE_TERMINATED | MPI2_SCSI_STATE_NO_SCSI_STATUS) then return the I/O to SCSI midlayer with "DID_RESET" (i.e. retry the IO infinite times) set in the host byte.

Previously, the driver was completing the I/O with "DID_SOFT_ERROR" which causes the I/O to be quickly retried. However, firmware needed more time and hence I/Os were failing.

---
 drivers/scsi/mpt3sas/mpt3sas_scsih.c |    5 +++++
 1 file changed, 5 insertions(+)

@@ -4770,6 +4770,11 @@ _scsih_io_done(struct MPT3SAS_ADAPTER *i
 		} else if (log_info == VIRTUAL_IO_FAILED_RETRY) {
 			scmd->result = DID_RESET << 16;
 			break;
+		} else if ((scmd->device->channel == RAID_CHANNEL) &&
+		   (scsi_state == (MPI2_SCSI_STATE_TERMINATED |
+		   MPI2_SCSI_STATE_NO_SCSI_STATUS))) {
+			scmd->result = DID_RESET << 16;
+			break;
 		}
 		scmd->result = DID_SOFT_ERROR << 16;
 		break;

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/scsi-mpt3sas-fix-io-error-occurs-on-pulling-out-a-drive-from-raid1-volume-created-on-two-sata-drive.patch