FAILED: patch "[PATCH] block: set QUEUE_FLAG_DYING unconditionally in" failed to apply to 6.1-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 6.1-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y
git checkout FETCH_HEAD
git cherry-pick -x 7e9a46004b471eaf69b082c473d865316a4158e0
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026090327-engross-lapped-120b@gregkh' --subject-prefix 'PATCH 6.1.y' 'HEAD^..'

Possible dependencies:



thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 7e9a46004b471eaf69b082c473d865316a4158e0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=83=A1=E8=BF=9E=E5=8B=A4?= <hulianqin@vivo.com>
Date: Wed, 12 Aug 2026 11:59:04 +0000
Subject: [PATCH] block: set QUEUE_FLAG_DYING unconditionally in
 blk_mark_disk_dead()

Disks created via blk_mq_alloc_disk_for_queue() (e.g. SCSI SD disks)
do not have GD_OWNS_QUEUE set.  Currently __blk_mark_disk_dead() only
sets QUEUE_FLAG_DYING when GD_OWNS_QUEUE is set, so for such disks
blk_queue_enter() and __bio_queue_enter() cannot detect the dying
state via blk_queue_dying() and remain blocked waiting for I/O that
will never complete after surprise removal.

blk_mark_disk_dead() is the explicit "surprise removal" API -- the
caller has already decided the disk is dead.  Setting QUEUE_FLAG_DYING
unconditionally here is appropriate: any in-flight I/O from other
threads should get -ENODEV immediately from blk_queue_enter()
regardless of GD_OWNS_QUEUE ownership.

For disks that already have GD_OWNS_QUEUE set, __blk_mark_disk_dead()
will set the flag again which is harmless.

Fixes: 6f8191fdf41d ("block: simplify disk shutdown")
Cc: stable@vger.kernel.org
Signed-off-by: Lianqin Hu <hulianqin@vivo.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/PUZPR06MB62247E82E66A3ED46CC3E6C7D2DC2@PUZPR06MB6224.apcprd06.prod.outlook.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/block/genhd.c b/block/genhd.c
index df2c3c69b467..7b089e2d52c4 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -681,6 +681,7 @@ static bool __blk_mark_disk_dead(struct gendisk *disk)
  */
 void blk_mark_disk_dead(struct gendisk *disk)
 {
+	blk_queue_flag_set(QUEUE_FLAG_DYING, disk->queue);
 	__blk_mark_disk_dead(disk);
 	blk_report_disk_dead(disk, true);
 }