From 466552b9f3730f06fee75776a208f5fa9c06c6a3 Mon Sep 17 00:00:00 2001 From: Hannes Reinecke Date: Fri, 28 Feb 2020 08:53:07 +0100 Subject: scsi: core: add scsi_host_complete_all_commands() helper Add a helper scsi_host_complete_all_commands() to terminate all outstanding commands on a SCSI host. Link: https://lore.kernel.org/r/20200228075318.91255-3-hare@suse.de Signed-off-by: Hannes Reinecke Signed-off-by: Martin K. Petersen --- drivers/scsi/hosts.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) (limited to 'drivers/scsi/hosts.c') diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c index 1d669e47b692..00ae9d43ce9f 100644 --- a/drivers/scsi/hosts.c +++ b/drivers/scsi/hosts.c @@ -650,3 +650,31 @@ void scsi_flush_work(struct Scsi_Host *shost) flush_workqueue(shost->work_q); } EXPORT_SYMBOL_GPL(scsi_flush_work); + +static bool complete_all_cmds_iter(struct request *rq, void *data, bool rsvd) +{ + struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq); + int status = *(int *)data; + + scsi_dma_unmap(scmd); + scmd->result = status << 16; + scmd->scsi_done(scmd); + return true; +} + +/** + * scsi_host_complete_all_commands - Terminate all running commands + * @shost: Scsi Host on which commands should be terminated + * @status: Status to be set for the terminated commands + * + * There is no protection against modification of the number + * of outstanding commands. It is the responsibility of the + * caller to ensure that concurrent I/O submission and/or + * completion is stopped when calling this function. + */ +void scsi_host_complete_all_commands(struct Scsi_Host *shost, int status) +{ + blk_mq_tagset_busy_iter(&shost->tag_set, complete_all_cmds_iter, + &status); +} +EXPORT_SYMBOL_GPL(scsi_host_complete_all_commands); -- cgit v1.2.3