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Commit 5a50e842 authored by Stefan Haberland's avatar Stefan Haberland Committed by Greg Kroah-Hartman
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s390/dasd: fix hanging blockdevice after request requeue 



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: e443343e ("s390/dasd: blk-mq conversion")
CC: stable@vger.kernel.org # 4.14+
Signed-off-by: default avatarStefan Haberland <sth@linux.ibm.com>
Reviewed-by: default avatarJan Hoeppner <hoeppner@linux.ibm.com>
Reviewed-by: default avatarHalil Pasic <pasic@linux.ibm.com>
Link: https://lore.kernel.org/r/20230405142017.2446986-8-sth@linux.ibm.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent fdca36e1

drivers/s390/block/dasd.c

+1 −1
Original line number Diff line number Diff line
@@ -2841,7 +2841,7 @@ static int _dasd_requeue_request(struct dasd_ccw_req *cqr) 
		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;