ide: don't use req->special

Just replace it with a field of the same name in struct ide_req.

Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

12 files changed, 31 insertions, 26 deletions

diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index 33210bc67618..da58020a144e 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -94,7 +94,7 @@ int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk,
 
         rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, 0);
         ide_req(rq)->type = ATA_PRIV_MISC;
-        rq->special = (char *)pc;
+        ide_req(rq)->special = pc;
 
         if (buf && bufflen) {
                 error = blk_rq_map_kern(drive->queue, rq, buf, bufflen,
@@ -244,7 +244,7 @@ int ide_queue_sense_rq(ide_drive_t *drive, void *special)
                 return -ENOMEM;
         }
 
-        sense_rq->special = special;
+        ide_req(sense_rq)->special = special;
         drive->sense_rq_armed = false;
 
         drive->hwif->rq = NULL;
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 69c1aede5f93..1f03884a6808 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -211,12 +211,12 @@ static void cdrom_analyze_sense_data(ide_drive_t *drive,
 static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
 {
         /*
-         * For ATA_PRIV_SENSE, "rq->special" points to the original
+         * For ATA_PRIV_SENSE, "ide_req(rq)->special" points to the original
          * failed request.  Also, the sense data should be read
          * directly from rq which might be different from the original
          * sense buffer if it got copied during mapping.
          */
-        struct request *failed = (struct request *)rq->special;
+        struct request *failed = ide_req(rq)->special;
         void *sense = bio_data(rq->bio);
 
         if (failed) {
diff --git a/drivers/ide/ide-devsets.c b/drivers/ide/ide-devsets.c
index f4f8afdf8bbe..f2f93ed40356 100644
--- a/drivers/ide/ide-devsets.c
+++ b/drivers/ide/ide-devsets.c
@@ -171,7 +171,7 @@ int ide_devset_execute(ide_drive_t *drive, const struct ide_devset *setting,
         scsi_req(rq)->cmd_len = 5;
         scsi_req(rq)->cmd[0] = REQ_DEVSET_EXEC;
         *(int *)&scsi_req(rq)->cmd[1] = arg;
-        rq->special = setting->set;
+        ide_req(rq)->special = setting->set;
 
         blk_execute_rq(q, NULL, rq, 0);
         ret = scsi_req(rq)->result;
@@ -182,7 +182,7 @@ int ide_devset_execute(ide_drive_t *drive, const struct ide_devset *setting,
 
 ide_startstop_t ide_do_devset(ide_drive_t *drive, struct request *rq)
 {
-        int err, (*setfunc)(ide_drive_t *, int) = rq->special;
+        int err, (*setfunc)(ide_drive_t *, int) = ide_req(rq)->special;
 
         err = setfunc(drive, *(int *)&scsi_req(rq)->cmd[1]);
         if (err)
diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c
index 724db9af0d82..197912af5c2f 100644
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -434,8 +434,8 @@ static bool idedisk_prep_rq(ide_drive_t *drive, struct request *rq)
         if (req_op(rq) != REQ_OP_FLUSH)
                 return true;
 
-        if (rq->special) {
-                cmd = rq->special;
+        if (ide_req(rq)->special) {
+                cmd = ide_req(rq)->special;
                 memset(cmd, 0, sizeof(*cmd));
         } else {
                 cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC);
@@ -455,7 +455,7 @@ static bool idedisk_prep_rq(ide_drive_t *drive, struct request *rq)
         rq->cmd_flags &= ~REQ_OP_MASK;
         rq->cmd_flags |= REQ_OP_DRV_OUT;
         ide_req(rq)->type = ATA_PRIV_TASKFILE;
-        rq->special = cmd;
+        ide_req(rq)->special = cmd;
         cmd->rq = rq;
 
         return true;
diff --git a/drivers/ide/ide-eh.c b/drivers/ide/ide-eh.c
index 47d5f3379748..e1323e058454 100644
--- a/drivers/ide/ide-eh.c
+++ b/drivers/ide/ide-eh.c
@@ -125,7 +125,7 @@ ide_startstop_t ide_error(ide_drive_t *drive, const char *msg, u8 stat)
         /* retry only "normal" I/O: */
         if (blk_rq_is_passthrough(rq)) {
                 if (ata_taskfile_request(rq)) {
-                        struct ide_cmd *cmd = rq->special;
+                        struct ide_cmd *cmd = ide_req(rq)->special;
 
                         if (cmd)
                                 ide_complete_cmd(drive, cmd, stat, err);
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index a8df300f949c..780d33ccc5d8 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -276,7 +276,7 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
                 switch (ide_req(rq)->type) {
                 case ATA_PRIV_MISC:
                 case ATA_PRIV_SENSE:
-                        pc = (struct ide_atapi_pc *)rq->special;
+                        pc = (struct ide_atapi_pc *)ide_req(rq)->special;
                         break;
                 default:
                         BUG();
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index 64e72640acf8..94e9c79c41cf 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -111,7 +111,7 @@ void ide_complete_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat, u8 err)
         }
 
         if (rq && ata_taskfile_request(rq)) {
-                struct ide_cmd *orig_cmd = rq->special;
+                struct ide_cmd *orig_cmd = ide_req(rq)->special;
 
                 if (cmd->tf_flags & IDE_TFLAG_DYN)
                         kfree(orig_cmd);
@@ -261,7 +261,7 @@ EXPORT_SYMBOL_GPL(ide_init_sg_cmd);
 static ide_startstop_t execute_drive_cmd (ide_drive_t *drive,
                 struct request *rq)
 {
-        struct ide_cmd *cmd = rq->special;
+        struct ide_cmd *cmd = ide_req(rq)->special;
 
         if (cmd) {
                 if (cmd->protocol == ATA_PROT_PIO) {
@@ -352,7 +352,7 @@ static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq)
                 if (ata_taskfile_request(rq))
                         return execute_drive_cmd(drive, rq);
                 else if (ata_pm_request(rq)) {
-                        struct ide_pm_state *pm = rq->special;
+                        struct ide_pm_state *pm = ide_req(rq)->special;
 #ifdef DEBUG_PM
                         printk("%s: start_power_step(step: %d)\n",
                                 drive->name, pm->pm_step);
@@ -460,16 +460,20 @@ blk_status_t ide_queue_rq(struct blk_mq_hw_ctx *hctx,
         ide_drive_t     *drive = hctx->queue->queuedata;
         ide_hwif_t      *hwif = drive->hwif;
         struct ide_host *host = hwif->host;
-        struct request  *rq = NULL;
+        struct request  *rq = bd->rq;
         ide_startstop_t startstop;
 
+        if (!(rq->rq_flags & RQF_DONTPREP)) {
+                rq->rq_flags |= RQF_DONTPREP;
+                ide_req(rq)->special = NULL;
+        }
+
         /* HLD do_request() callback might sleep, make sure it's okay */
         might_sleep();
 
         if (ide_lock_host(host, hwif))
                 return BLK_STS_DEV_RESOURCE;
 
-        rq = bd->rq;
         blk_mq_start_request(rq);
 
         spin_lock_irq(&hwif->lock);
diff --git a/drivers/ide/ide-park.c b/drivers/ide/ide-park.c
index de9e85cf74d1..102aa3bc3e7f 100644
--- a/drivers/ide/ide-park.c
+++ b/drivers/ide/ide-park.c
@@ -36,7 +36,7 @@ static void issue_park_cmd(ide_drive_t *drive, unsigned long timeout)
         scsi_req(rq)->cmd[0] = REQ_PARK_HEADS;
         scsi_req(rq)->cmd_len = 1;
         ide_req(rq)->type = ATA_PRIV_MISC;
-        rq->special = &timeout;
+        ide_req(rq)->special = &timeout;
         blk_execute_rq(q, NULL, rq, 1);
         rc = scsi_req(rq)->result ? -EIO : 0;
         blk_put_request(rq);
@@ -67,7 +67,7 @@ ide_startstop_t ide_do_park_unpark(ide_drive_t *drive, struct request *rq)
 
         memset(&cmd, 0, sizeof(cmd));
         if (scsi_req(rq)->cmd[0] == REQ_PARK_HEADS) {
-                drive->sleep = *(unsigned long *)rq->special;
+                drive->sleep = *(unsigned long *)ide_req(rq)->special;
                 drive->dev_flags |= IDE_DFLAG_SLEEPING;
                 tf->command = ATA_CMD_IDLEIMMEDIATE;
                 tf->feature = 0x44;
diff --git a/drivers/ide/ide-pm.c b/drivers/ide/ide-pm.c
index ea10507e5190..a8c53c98252d 100644
--- a/drivers/ide/ide-pm.c
+++ b/drivers/ide/ide-pm.c
@@ -21,7 +21,7 @@ int generic_ide_suspend(struct device *dev, pm_message_t mesg)
         memset(&rqpm, 0, sizeof(rqpm));
         rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, 0);
         ide_req(rq)->type = ATA_PRIV_PM_SUSPEND;
-        rq->special = &rqpm;
+        ide_req(rq)->special = &rqpm;
         rqpm.pm_step = IDE_PM_START_SUSPEND;
         if (mesg.event == PM_EVENT_PRETHAW)
                 mesg.event = PM_EVENT_FREEZE;
@@ -82,7 +82,7 @@ int generic_ide_resume(struct device *dev)
         memset(&rqpm, 0, sizeof(rqpm));
         rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, BLK_MQ_REQ_PREEMPT);
         ide_req(rq)->type = ATA_PRIV_PM_RESUME;
-        rq->special = &rqpm;
+        ide_req(rq)->special = &rqpm;
         rqpm.pm_step = IDE_PM_START_RESUME;
         rqpm.pm_state = PM_EVENT_ON;
 
@@ -101,7 +101,7 @@ int generic_ide_resume(struct device *dev)
 
 void ide_complete_power_step(ide_drive_t *drive, struct request *rq)
 {
-        struct ide_pm_state *pm = rq->special;
+        struct ide_pm_state *pm = ide_req(rq)->special;
 
 #ifdef DEBUG_PM
         printk(KERN_INFO "%s: complete_power_step(step: %d)\n",
@@ -131,7 +131,7 @@ void ide_complete_power_step(ide_drive_t *drive, struct request *rq)
 
 ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request *rq)
 {
-        struct ide_pm_state *pm = rq->special;
+        struct ide_pm_state *pm = ide_req(rq)->special;
         struct ide_cmd cmd = { };
 
         switch (pm->pm_step) {
@@ -203,7 +203,7 @@ out_do_tf:
 void ide_complete_pm_rq(ide_drive_t *drive, struct request *rq)
 {
         struct request_queue *q = drive->queue;
-        struct ide_pm_state *pm = rq->special;
+        struct ide_pm_state *pm = ide_req(rq)->special;
         unsigned long flags;
 
         ide_complete_power_step(drive, rq);
@@ -228,7 +228,7 @@ void ide_complete_pm_rq(ide_drive_t *drive, struct request *rq)
 
 void ide_check_pm_state(ide_drive_t *drive, struct request *rq)
 {
-        struct ide_pm_state *pm = rq->special;
+        struct ide_pm_state *pm = ide_req(rq)->special;
 
         if (blk_rq_is_private(rq) &&
             ide_req(rq)->type == ATA_PRIV_PM_SUSPEND &&
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index 34c1165226a4..db1a65f4b490 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -639,7 +639,7 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
                 goto out;
         }
         if (req->cmd[13] & REQ_IDETAPE_PC1) {
-                pc = (struct ide_atapi_pc *)rq->special;
+                pc = (struct ide_atapi_pc *)ide_req(rq)->special;
                 req->cmd[13] &= ~(REQ_IDETAPE_PC1);
                 req->cmd[13] |= REQ_IDETAPE_PC2;
                 goto out;
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index c21d5c50ae3a..17b2e379e872 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -440,7 +440,7 @@ int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
                         goto put_req;
         }
 
-        rq->special = cmd;
+        ide_req(rq)->special = cmd;
         cmd->rq = rq;
 
         blk_execute_rq(drive->queue, NULL, rq, 0);
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 272704ff21ee..e7d29ae633cd 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -50,6 +50,7 @@ struct ide_request {
         struct scsi_request sreq;
         u8 sense[SCSI_SENSE_BUFFERSIZE];
         u8 type;
+        void *special;
 };
 
 static inline struct ide_request *ide_req(struct request *rq)