Patch "mtip32xx: Fix broken service thread handling" has been added to the 4.4-stable tree

Patch "mtip32xx: Fix broken service thread handling" has been added to the 4.4-stable tree

[gregkh]

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

    mtip32xx: Fix broken service thread handling

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:
     mtip32xx-fix-broken-service-thread-handling.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 cfc05bd31384c4898bf2437a4de5557f3cf9803a Mon Sep 17 00:00:00 2001
From: Asai Thambi SP <asamymuthupa@micron.com>
Date: Wed, 24 Feb 2016 21:16:00 -0800
Subject: mtip32xx: Fix broken service thread handling

From: Asai Thambi SP <asamymuthupa@micron.com>

commit cfc05bd31384c4898bf2437a4de5557f3cf9803a upstream.

Service thread does not detect the need for taskfile error hanlding. Fixed the
flag condition to process taskfile error.

Signed-off-by: Selvan Mani <smani@micron.com>
Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/block/mtip32xx/mtip32xx.c |    6 +++---
 drivers/block/mtip32xx/mtip32xx.h |    5 +++++
 2 files changed, 8 insertions(+), 3 deletions(-)

--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -2924,9 +2924,7 @@ static int mtip_service_thread(void *dat
 		 * is in progress nor error handling is active
 		 */
 		wait_event_interruptible(port->svc_wait, (port->flags) &&
-			!(port->flags & MTIP_PF_PAUSE_IO));
-
-		set_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags);
+			(port->flags & MTIP_PF_SVC_THD_WORK));
 
 		if (kthread_should_stop() ||
 			test_bit(MTIP_PF_SVC_THD_STOP_BIT, &port->flags))
@@ -2936,6 +2934,8 @@ static int mtip_service_thread(void *dat
 				&dd->dd_flag)))
 			goto st_out;
 
+		set_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags);
+
 restart_eh:
 		/* Demux bits: start with error handling */
 		if (test_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags)) {
--- a/drivers/block/mtip32xx/mtip32xx.h
+++ b/drivers/block/mtip32xx/mtip32xx.h
@@ -144,6 +144,11 @@ enum {
 	MTIP_PF_REBUILD_BIT         = 6,
 	MTIP_PF_SVC_THD_STOP_BIT    = 8,
 
+	MTIP_PF_SVC_THD_WORK	= ((1 << MTIP_PF_EH_ACTIVE_BIT) |
+				  (1 << MTIP_PF_ISSUE_CMDS_BIT) |
+				  (1 << MTIP_PF_REBUILD_BIT) |
+				  (1 << MTIP_PF_SVC_THD_STOP_BIT)),
+
 	/* below are bit numbers in 'dd_flag' defined in driver_data */
 	MTIP_DDF_SEC_LOCK_BIT	    = 0,
 	MTIP_DDF_REMOVE_PENDING_BIT = 1,


Patches currently in stable-queue which might be from asamymuthupa@micron.com are

queue-4.4/mtip32xx-print-exact-time-when-an-internal-command-is-interrupted.patch
queue-4.4/mtip32xx-implement-timeout-handler.patch
queue-4.4/mtip32xx-cleanup-queued-requests-after-surprise-removal.patch
queue-4.4/mtip32xx-avoid-issuing-standby-immediate-cmd-during-ftl-rebuild.patch
queue-4.4/mtip32xx-handle-safe-removal-during-io.patch
queue-4.4/mtip32xx-remove-unwanted-code-from-taskfile-error-handler.patch
queue-4.4/mtip32xx-handle-ftl-rebuild-failure-state-during-device-initialization.patch
queue-4.4/mtip32xx-fix-for-rmmod-crash-when-drive-is-in-ftl-rebuild.patch
queue-4.4/mtip32xx-fix-broken-service-thread-handling.patch