Modify scsi_find_tag() and scsi_host_find_tag() such that these
fuctions can translate a tag generated by blk_mq_unique_tag().
Signed-off-by: Bart Van Assche <bvanass...@acm.org>
Cc: Christoph Hellwig <h...@lst.de>
Cc: Sagi Grimberg <sa...@mellanox.com>
---
include/scsi/scsi_tcq.h | 19 +++++++++++--------
1 file changed, 11 insertions(+), 8 deletions(-)
diff --git a/include/scsi/scsi_tcq.h b/include/scsi/scsi_tcq.h
index e645835..ea1ca9c 100644
--- a/include/scsi/scsi_tcq.h
+++ b/include/scsi/scsi_tcq.h
@@ -111,18 +111,21 @@ static inline int scsi_populate_tag_msg(struct scsi_cmnd
*cmd, char *msg)
}
static inline struct scsi_cmnd *scsi_mq_find_tag(struct Scsi_Host *shost,
- unsigned int hw_ctx, int tag)
+ int unique_tag)
{
- struct request *req;
+ u16 hwq = blk_mq_unique_tag_to_hwq(unique_tag);
+ struct request *req = NULL;
- req = blk_mq_tag_to_rq(shost->tag_set.tags[hw_ctx], tag);
+ if (hwq < shost->tag_set.nr_hw_queues)
+ req = blk_mq_tag_to_rq(shost->tag_set.tags[hwq],
+ blk_mq_unique_tag_to_tag(unique_tag));
return req ? (struct scsi_cmnd *)req->special : NULL;
}
/**
* scsi_find_tag - find a tagged command by device
* @SDpnt: pointer to the ScSI device
- * @tag: the tag number
+ * @tag: tag generated by blk_mq_unique_tag()
*
* Notes:
* Only works with tags allocated by the generic blk layer.
@@ -133,9 +136,9 @@ static inline struct scsi_cmnd *scsi_find_tag(struct
scsi_device *sdev, int tag)
if (tag != SCSI_NO_TAG) {
if (shost_use_blk_mq(sdev->host))
- return scsi_mq_find_tag(sdev->host, 0, tag);
+ return scsi_mq_find_tag(sdev->host, tag);
- req = blk_queue_find_tag(sdev->request_queue, tag);
+ req = blk_queue_find_tag(sdev->request_queue, tag);
return req ? (struct scsi_cmnd *)req->special : NULL;
}
@@ -174,7 +177,7 @@ static inline int scsi_init_shared_tag_map(struct Scsi_Host
*shost, int depth)
/**
* scsi_host_find_tag - find the tagged command by host
* @shost: pointer to scsi_host
- * @tag: tag of the scsi_cmnd
+ * @tag: tag generated by blk_mq_unique_tag()
*
* Notes:
* Only works with tags allocated by the generic blk layer.
@@ -186,7 +189,7 @@ static inline struct scsi_cmnd *scsi_host_find_tag(struct
Scsi_Host *shost,
if (tag != SCSI_NO_TAG) {
if (shost_use_blk_mq(shost))
- return scsi_mq_find_tag(shost, 0, tag);
+ return scsi_mq_find_tag(shost, tag);
req = blk_map_queue_find_tag(shost->bqt, tag);
return req ? (struct scsi_cmnd *)req->special : NULL;
}
--
1.8.4.5
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