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| author | Hannes Reinecke <hare@suse.de> | 2020-02-28 10:53:07 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-02-29 04:54:47 +0300 |
| commit | 466552b9f3730f06fee75776a208f5fa9c06c6a3 (patch) | |
| tree | 0ce5663b6338fc49aea53500a52bdb2a141319fe | |
| parent | 22f0ba4a2825f9cb87c142f7fcd3bf3d496ded0f (diff) | |
| download | linux-466552b9f3730f06fee75776a208f5fa9c06c6a3.tar.xz | |
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 <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/scsi/hosts.c | 28 | ||||
| -rw-r--r-- | include/scsi/scsi_host.h | 2 |
2 files changed, 30 insertions, 0 deletions
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); diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index 7a97fb8104cf..25bef781cbe1 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -732,6 +732,8 @@ extern int scsi_host_busy(struct Scsi_Host *shost); extern void scsi_host_put(struct Scsi_Host *t); extern struct Scsi_Host *scsi_host_lookup(unsigned short); extern const char *scsi_host_state_name(enum scsi_host_state); +extern void scsi_host_complete_all_commands(struct Scsi_Host *shost, + int status); static inline int __must_check scsi_add_host(struct Scsi_Host *host, struct device *dev) |