ide: remove atapi_feature_t

Remove atapi_feature_t.

While at it:
* replace 'HWIF(drive)' by 'hwif'
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-floppy.c

@@ -1019,9 +1019,9 @@ static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *p
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
 	ide_hwif_t *hwif = drive->hwif;
-	atapi_feature_t feature;
 	atapi_bcount_t bcount;
 	ide_handler_t *pkt_xfer_routine;
+	u8 dma;
 
 	if (floppy->failed_pc == NULL &&
 	    pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD)
@@ -1064,20 +1064,20 @@ static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *p
 	if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
 		ide_dma_off(drive);
 
-	feature.all = 0;
+	dma = 0;
 
 	if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
-		feature.b.dma = !hwif->dma_setup(drive);
+		dma = !hwif->dma_setup(drive);
 
 	if (IDE_CONTROL_REG)
 		HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG);
 	/* Use PIO/DMA */
-	HWIF(drive)->OUTB(feature.all, IDE_FEATURE_REG);
+	hwif->OUTB(dma, IDE_FEATURE_REG);
 	HWIF(drive)->OUTB(bcount.b.high, IDE_BCOUNTH_REG);
 	HWIF(drive)->OUTB(bcount.b.low, IDE_BCOUNTL_REG);
 	HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG);
 
-	if (feature.b.dma) {	/* Begin DMA, if necessary */
+	if (dma) {	/* Begin DMA, if necessary */
 		set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
 		hwif->dma_start(drive);
 	}

drivers/scsi/ide-scsi.c

@@ -399,7 +399,6 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
 	struct request *rq = pc->rq;
 	atapi_bcount_t bcount;
 	atapi_ireason_t ireason;
-	atapi_feature_t feature;
 	unsigned int temp;
 	u8 stat;
 
@@ -424,7 +423,6 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
 		(void) HWIF(drive)->ide_dma_end(drive);
 	}
 
-	feature.all = 0;
 	/* Clear the interrupt */
 	stat = drive->hwif->INB(IDE_STATUS_REG);
 
@@ -572,18 +570,17 @@ static ide_startstop_t idescsi_issue_pc (ide_drive_t *drive, idescsi_pc_t *pc)
 {
 	idescsi_scsi_t *scsi = drive_to_idescsi(drive);
 	ide_hwif_t *hwif = drive->hwif;
-	atapi_feature_t feature;
 	atapi_bcount_t bcount;
+	u8 dma = 0;
 
 	scsi->pc=pc;							/* Set the current packet command */
 	pc->actually_transferred=0;					/* We haven't transferred any data yet */
 	pc->current_position=pc->buffer;
 	bcount.all = min(pc->request_transfer, 63 * 1024);		/* Request to transfer the entire buffer at once */
 
-	feature.all = 0;
 	if (drive->using_dma && !idescsi_map_sg(drive, pc)) {
 		hwif->sg_mapped = 1;
-		feature.b.dma = !hwif->dma_setup(drive);
+		dma = !hwif->dma_setup(drive);
 		hwif->sg_mapped = 0;
 	}
 
@@ -591,11 +588,11 @@ static ide_startstop_t idescsi_issue_pc (ide_drive_t *drive, idescsi_pc_t *pc)
 	if (IDE_CONTROL_REG)
 		HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG);
 
-	HWIF(drive)->OUTB(feature.all, IDE_FEATURE_REG);
+	hwif->OUTB(dma, IDE_FEATURE_REG);
 	HWIF(drive)->OUTB(bcount.b.high, IDE_BCOUNTH_REG);
 	HWIF(drive)->OUTB(bcount.b.low, IDE_BCOUNTL_REG);
 
-	if (feature.b.dma)
+	if (dma)
 		set_bit(PC_DMA_OK, &pc->flags);
 
 	if (test_bit(IDESCSI_DRQ_INTERRUPT, &scsi->flags)) {

include/linux/ide.h

@@ -365,33 +365,6 @@ typedef union {
 	} b;
 } select_t, ata_select_t;
 
-/*
- * ATAPI Feature Register
- *
- * dma		: Using DMA or PIO
- * reserved321	: Reserved
- * reserved654	: Reserved (Tag Type)
- * reserved7	: Reserved
- */
-typedef union {
-	unsigned all			:8;
-	struct {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
-		unsigned dma		:1;
-		unsigned reserved321	:3;
-		unsigned reserved654	:3;
-		unsigned reserved7	:1;
-#elif defined(__BIG_ENDIAN_BITFIELD)
-		unsigned reserved7	:1;
-		unsigned reserved654	:3;
-		unsigned reserved321	:3;
-		unsigned dma		:1;
-#else
-#error "Please fix <asm/byteorder.h>"
-#endif
-	} b;
-} atapi_feature_t;
-
 /*
  * ATAPI Interrupt Reason Register.
  *