Patch "nvme-fc: fix iowait hang" has been added to the 4.13-stable tree

Patch "nvme-fc: fix iowait hang" has been added to the 4.13-stable tree

[gregkh]

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

    nvme-fc: fix iowait hang

to the 4.13-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:
     nvme-fc-fix-iowait-hang.patch
and it can be found in the queue-4.13 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 8a82dbf19129dde9e6fc9ab25a00dbc7569abe6a Mon Sep 17 00:00:00 2001
From: James Smart <jsmart2021@gmail.com>
Date: Mon, 9 Oct 2017 13:39:44 -0700
Subject: nvme-fc: fix iowait hang
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: James Smart <jsmart2021@gmail.com>

commit 8a82dbf19129dde9e6fc9ab25a00dbc7569abe6a upstream.

Add missing iowait head initialization.
Fix irqsave vs irq: wait_event_lock_irq() doesn't do irq save/restore

Fixes: 36715cf4b366 ("nvme_fc: replace ioabort msleep loop with completion”)
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Tested-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/nvme/host/fc.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -2477,10 +2477,10 @@ nvme_fc_delete_association(struct nvme_f
 	nvme_fc_abort_aen_ops(ctrl);
 
 	/* wait for all io that had to be aborted */
-	spin_lock_irqsave(&ctrl->lock, flags);
+	spin_lock_irq(&ctrl->lock);
 	wait_event_lock_irq(ctrl->ioabort_wait, ctrl->iocnt == 0, ctrl->lock);
 	ctrl->flags &= ~FCCTRL_TERMIO;
-	spin_unlock_irqrestore(&ctrl->lock, flags);
+	spin_unlock_irq(&ctrl->lock);
 
 	nvme_fc_term_aen_ops(ctrl);
 
@@ -2693,6 +2693,7 @@ nvme_fc_init_ctrl(struct device *dev, st
 	ctrl->rport = rport;
 	ctrl->dev = lport->dev;
 	ctrl->cnum = idx;
+	init_waitqueue_head(&ctrl->ioabort_wait);
 
 	get_device(ctrl->dev);
 	kref_init(&ctrl->ref);


Patches currently in stable-queue which might be from jsmart2021@gmail.com are

queue-4.13/nvme-fc-fix-iowait-hang.patch