This is a note to let you know that I've just added the patch titled
s390/dasd: fix hanging blockdevice after request requeue
to the 5.4-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:
s390-dasd-fix-hanging-blockdevice-after-request-requeue.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From d8898ee50edecacdf0141f26fd90acf43d7e9cd7 Mon Sep 17 00:00:00 2001
From: Stefan Haberland <sth@xxxxxxxxxxxxx>
Date: Wed, 5 Apr 2023 16:20:17 +0200
Subject: s390/dasd: fix hanging blockdevice after request requeue
From: Stefan Haberland <sth@xxxxxxxxxxxxx>
commit d8898ee50edecacdf0141f26fd90acf43d7e9cd7 upstream.
The DASD driver does not kick the requeue list when requeuing IO requests
to the blocklayer. This might lead to hanging blockdevice when there is
no other trigger for this.
Fix by automatically kick the requeue list when requeuing DASD requests
to the blocklayer.
Fixes: e443343e509a ("s390/dasd: blk-mq conversion")
CC: stable@xxxxxxxxxxxxxxx # 4.14+
Signed-off-by: Stefan Haberland <sth@xxxxxxxxxxxxx>
Reviewed-by: Jan Hoeppner <hoeppner@xxxxxxxxxxxxx>
Reviewed-by: Halil Pasic <pasic@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230405142017.2446986-8-sth@xxxxxxxxxxxxx
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/s390/block/dasd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -3000,7 +3000,7 @@ static int _dasd_requeue_request(struct
return 0;
spin_lock_irq(&cqr->dq->lock);
req = (struct request *) cqr->callback_data;
- blk_mq_requeue_request(req, false);
+ blk_mq_requeue_request(req, true);
spin_unlock_irq(&cqr->dq->lock);
return 0;
Patches currently in stable-queue which might be from sth@xxxxxxxxxxxxx are
queue-5.4/s390-dasd-fix-hanging-blockdevice-after-request-requeue.patch
