From: Stefan Haberland <sth@linux.ibm.com>
Date: Fri, 21 Jul 2023 21:36:44 +0200
Subject: s390/dasd: fix hanging device after quiesce/resume
Git-commit: 05f1d8ed03f547054efbc4d29bb7991c958ede95
Patch-mainline: v6.5-rc4
References: git-fixes bsc#1214157 bsc#1215122

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@vger.kernel.org
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com>
Link: https://lore.kernel.org/r/20230721193647.3889634-2-sth@linux.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Miroslav Franc <mfranc@suse.cz>
---
 drivers/s390/block/dasd_ioctl.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/s390/block/dasd_ioctl.c b/drivers/s390/block/dasd_ioctl.c
index 513a7e6eee63..d55862605b82 100644
--- a/drivers/s390/block/dasd_ioctl.c
+++ b/drivers/s390/block/dasd_ioctl.c
@@ -131,6 +131,7 @@ static int dasd_ioctl_resume(struct dasd_block *block)
 	spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags);
 
 	dasd_schedule_block_bh(block);
+	dasd_schedule_device_bh(base);
 	return 0;
 }