[PATCH v3 07/51] ata: Use scsi_cmd_to_rq() instead of scsi_cmnd.request

[Bart Van Assche <bvanassche@xxxxxxx>]

Prepare for removal of the request pointer by using scsi_cmd_to_rq()
instead. This patch does not change any functionality.

Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Hannes Reinecke <hare@xxxxxxx>
Cc: Ming Lei <ming.lei@xxxxxxxxxx>
Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
---
 drivers/ata/libata-eh.c   |  5 ++---
 drivers/ata/libata-scsi.c | 10 +++++-----
 drivers/ata/pata_falcon.c |  4 ++--
 3 files changed, 9 insertions(+), 10 deletions(-)

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index bb3637762985..bf9c4b6c5c3d 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -912,7 +912,7 @@ void ata_qc_schedule_eh(struct ata_queued_cmd *qc)
 	 * Note that ATA_QCFLAG_FAILED is unconditionally set after
 	 * this function completes.
 	 */
-	blk_abort_request(qc->scsicmd->request);
+	blk_abort_request(scsi_cmd_to_rq(qc->scsicmd));
 }
 
 /**
@@ -1893,8 +1893,7 @@ static inline int ata_eh_worth_retry(struct ata_queued_cmd *qc)
  */
 static inline bool ata_eh_quiet(struct ata_queued_cmd *qc)
 {
-	if (qc->scsicmd &&
-	    qc->scsicmd->request->rq_flags & RQF_QUIET)
+	if (qc->scsicmd && scsi_cmd_to_rq(qc->scsicmd)->rq_flags & RQF_QUIET)
 		qc->flags |= ATA_QCFLAG_QUIET;
 	return qc->flags & ATA_QCFLAG_QUIET;
 }
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index fd8b6febbf70..debc78f653c1 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -627,7 +627,7 @@ static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
 {
 	struct ata_queued_cmd *qc;
 
-	qc = ata_qc_new_init(dev, cmd->request->tag);
+	qc = ata_qc_new_init(dev, scsi_cmd_to_rq(cmd)->tag);
 	if (qc) {
 		qc->scsicmd = cmd;
 		qc->scsidone = cmd->scsi_done;
@@ -635,7 +635,7 @@ static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
 		qc->sg = scsi_sglist(cmd);
 		qc->n_elem = scsi_sg_count(cmd);
 
-		if (cmd->request->rq_flags & RQF_QUIET)
+		if (scsi_cmd_to_rq(cmd)->rq_flags & RQF_QUIET)
 			qc->flags |= ATA_QCFLAG_QUIET;
 	} else {
 		cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
@@ -1497,7 +1497,7 @@ static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
 
 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks)
 {
-	struct request *rq = scmd->request;
+	struct request *rq = scsi_cmd_to_rq(scmd);
 	u32 req_blocks;
 
 	if (!blk_rq_is_passthrough(rq))
@@ -1532,7 +1532,7 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
 {
 	struct scsi_cmnd *scmd = qc->scsicmd;
 	const u8 *cdb = scmd->cmnd;
-	struct request *rq = scmd->request;
+	struct request *rq = scsi_cmd_to_rq(scmd);
 	int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq));
 	unsigned int tf_flags = 0;
 	u64 block;
@@ -3182,7 +3182,7 @@ static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
 	 * as it modifies the DATA OUT buffer, which would corrupt user
 	 * memory for SG_IO commands.
 	 */
-	if (unlikely(blk_rq_is_passthrough(scmd->request)))
+	if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd))))
 		goto invalid_opcode;
 
 	if (unlikely(scmd->cmd_len < 16)) {
diff --git a/drivers/ata/pata_falcon.c b/drivers/ata/pata_falcon.c
index 27b0952fde6b..154e3577878b 100644
--- a/drivers/ata/pata_falcon.c
+++ b/drivers/ata/pata_falcon.c
@@ -50,8 +50,8 @@ static unsigned int pata_falcon_data_xfer(struct ata_queued_cmd *qc,
 	struct scsi_cmnd *cmd = qc->scsicmd;
 	bool swap = 1;
 
-	if (dev->class == ATA_DEV_ATA && cmd && cmd->request &&
-	    !blk_rq_is_passthrough(cmd->request))
+	if (dev->class == ATA_DEV_ATA && cmd &&
+	    !blk_rq_is_passthrough(scsi_cmd_to_rq(cmd)))
 		swap = 0;
 
 	/* Transfer multiple of 2 bytes */