This is a note to let you know that I've just added the patch titled
s390/dasd: fix hanging device after quiesce/resume
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-device-after-quiesce-resume.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 05f1d8ed03f547054efbc4d29bb7991c958ede95 Mon Sep 17 00:00:00 2001
From: Stefan Haberland <sth@xxxxxxxxxxxxx>
Date: Fri, 21 Jul 2023 21:36:44 +0200
Subject: s390/dasd: fix hanging device after quiesce/resume
From: Stefan Haberland <sth@xxxxxxxxxxxxx>
commit 05f1d8ed03f547054efbc4d29bb7991c958ede95 upstream.
Quiesce and resume are functions that tell the DASD driver to stop/resume
issuing I/Os to a specific DASD.
On resume dasd_schedule_block_bh() is called to kick handling of IO
requests again. This does unfortunately not cover internal requests which
are used for path verification for example.
This could lead to a hanging device when a path event or anything else
that triggers internal requests occurs on a quiesced device.
Fix by also calling dasd_schedule_device_bh() which triggers handling of
internal requests on resume.
Fixes: 8e09f21574ea ("[S390] dasd: add hyper PAV support to DASD device driver, part 1")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Stefan Haberland <sth@xxxxxxxxxxxxx>
Reviewed-by: Jan Hoeppner <hoeppner@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230721193647.3889634-2-sth@xxxxxxxxxxxxx
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/s390/block/dasd_ioctl.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/s390/block/dasd_ioctl.c
+++ b/drivers/s390/block/dasd_ioctl.c
@@ -137,6 +137,7 @@ static int dasd_ioctl_resume(struct dasd
spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags);
dasd_schedule_block_bh(block);
+ dasd_schedule_device_bh(base);
return 0;
}
Patches currently in stable-queue which might be from sth@xxxxxxxxxxxxx are
queue-5.4/s390-dasd-fix-hanging-device-after-quiesce-resume.patch
