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| author | Bart Van Assche <bart.vanassche@wdc.com> | 2017-08-25 22:46:32 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-08-25 23:08:07 +0200 |
| commit | bed2213d01de474eb8a6f3891070eec6be6fe772 (patch) | |
| tree | 7cf1ff22eb30ec502abf3f5155cb04ef64d9a72c /include | |
| parent | scsi: Document which queue type a function is intended for (diff) | |
| download | linux-bed2213d01de474eb8a6f3891070eec6be6fe772.tar.xz linux-bed2213d01de474eb8a6f3891070eec6be6fe772.zip | |
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.h | 2 |
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 */ |