Patch "scsi: mpt3sas: Unblock device after controller reset" has been added to the 4.8-stable tree

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

scsi: mpt3sas: Unblock device after controller reset

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-mpt3sas-unblock-device-after-controller-reset.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 <[email protected]> know about it.

From: Suganath Prabu S <[email protected]>
Date: Thu, 17 Nov 2016 16:15:58 +0530
Subject: scsi: mpt3sas: Unblock device after controller reset

From: Suganath Prabu S <[email protected]>

commit 7ff723ad0f87feba43dda45fdae71206063dd7d4 upstream.

While issuing any ATA passthrough command to firmware the driver will block the device. But it will unblock the device only if the I/O completes through the ISR path. If a controller reset occurs before command completion the device will remain in blocked state.

Make sure we unblock the device following a controller reset if an ATA passthrough command was queued.

[mkp: clarified patch description]

---
 drivers/scsi/mpt3sas/mpt3sas_scsih.c |   13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

@@ -3894,6 +3894,11 @@ _scsih_temp_threshold_events(struct MPT3
 	}
 }
 
+static inline bool ata_12_16_cmd(struct scsi_cmnd *scmd)
+{
+	return (scmd->cmnd[0] == ATA_12 || scmd->cmnd[0] == ATA_16);
+}
+
 /**
  * _scsih_flush_running_cmds - completing outstanding commands.
  * @ioc: per adapter object

@@ -3915,6 +3920,9 @@ _scsih_flush_running_cmds(struct MPT3SAS
 		if (!scmd)
 			continue;
 		count++;
+		if (ata_12_16_cmd(scmd))
+			scsi_internal_device_unblock(scmd->device,
+							SDEV_RUNNING);
 		mpt3sas_base_free_smid(ioc, smid);
 		scsi_dma_unmap(scmd);
 		if (ioc->pci_error_recovery)

@@ -4019,11 +4027,6 @@ _scsih_eedp_error_handling(struct scsi_c
 	    SAM_STAT_CHECK_CONDITION;
 }
 
-static inline bool ata_12_16_cmd(struct scsi_cmnd *scmd)
-{
-	return (scmd->cmnd[0] == ATA_12 || scmd->cmnd[0] == ATA_16);
-}
-
 /**
  * scsih_qcmd - main scsi request entry point
  * @scmd: pointer to scsi command object

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

queue-4.8/scsi-mpt3sas-fix-secure-erase-premature-termination.patch queue-4.8/scsi-mpt3sas-unblock-device-after-controller-reset.patch