ide: use blk_rq_init() to initialize the request

This converts ide to use blk_rq_init to initialize the request.

This is a preparation for large command support, which needs to
initialize the request in a proper way (that is, just doing a memset()
will not work).

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

drivers/ide/ide-io.c

@@ -1550,8 +1550,7 @@ irqreturn_t ide_intr (int irq, void *dev_id)
 
 void ide_init_drive_cmd (struct request *rq)
 {
-	memset(rq, 0, sizeof(*rq));
+	blk_rq_init(NULL, rq);
-	rq->ref_count = 1;
 }
 
 EXPORT_SYMBOL(ide_init_drive_cmd);

drivers/ide/ide-tape.c

@@ -662,7 +662,7 @@ static void idetape_create_request_sense_cmd(struct ide_atapi_pc *pc)
 
 static void idetape_init_rq(struct request *rq, u8 cmd)
 {
-	memset(rq, 0, sizeof(*rq));
+	blk_rq_init(NULL, rq);
 	rq->cmd_type = REQ_TYPE_SPECIAL;
 	rq->cmd[0] = cmd;
 }

drivers/ide/ide-taskfile.c

@@ -494,8 +494,7 @@ int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
 {
 	struct request rq;
 
-	memset(&rq, 0, sizeof(rq));
+	blk_rq_init(NULL, &rq);
-	rq.ref_count = 1;
 	rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 	rq.buffer = buf;
 

drivers/ide/ide.c

@@ -564,7 +564,7 @@ static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 	if (!(drive->dn % 2))
 		ide_acpi_get_timing(hwif);
 
-	memset(&rq, 0, sizeof(rq));
+	blk_rq_init(NULL, &rq);
 	memset(&rqpm, 0, sizeof(rqpm));
 	memset(&args, 0, sizeof(args));
 	rq.cmd_type = REQ_TYPE_PM_SUSPEND;
@@ -602,7 +602,7 @@ static int generic_ide_resume(struct device *dev)
 
 	ide_acpi_exec_tfs(drive);
 
-	memset(&rq, 0, sizeof(rq));
+	blk_rq_init(NULL, &rq);
 	memset(&rqpm, 0, sizeof(rqpm));
 	memset(&args, 0, sizeof(args));
 	rq.cmd_type = REQ_TYPE_PM_RESUME;