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authorBart Van Assche <bart.vanassche@wdc.com>2017-08-25 13:46:32 -0700
committerMartin K. Petersen <martin.petersen@oracle.com>2017-08-25 17:08:07 -0400
commitbed2213d01de474eb8a6f3891070eec6be6fe772 (patch)
tree7cf1ff22eb30ec502abf3f5155cb04ef64d9a72c /include
parente7008ff5c61a13e673344d3048baaf8e0652fa87 (diff)
scsi: Use blk_mq_rq_to_pdu() to convert a request to a SCSI command pointer
Since commit e9c787e65c0c ("scsi: allocate scsi_cmnd structures as part of struct request") struct request and struct scsi_cmnd are adjacent. This means that there is now an alternative to reading req->special to convert a pointer to a prepared request into a SCSI command pointer, namely by using blk_mq_rq_to_pdu(). Make this change where appropriate. Although this patch does not change any functionality, it slightly improves performance and slightly improves readability. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'include')
-rw-r--r--include/scsi/scsi_tcq.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/scsi/scsi_tcq.h b/include/scsi/scsi_tcq.h
index 4416b1026189..5b416debf101 100644
--- a/include/scsi/scsi_tcq.h
+++ b/include/scsi/scsi_tcq.h
@@ -39,7 +39,7 @@ static inline struct scsi_cmnd *scsi_host_find_tag(struct Scsi_Host *shost,
if (!req)
return NULL;
- return req->special;
+ return blk_mq_rq_to_pdu(req);
}
#endif /* CONFIG_BLOCK */