5 files changed, 65 insertions, 79 deletions

diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c
index ffff96e6ab3e..747dc6023346 100644
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -137,14 +137,12 @@ static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
 {
         ide_hwif_t *hwif        = HWIF(drive);
         unsigned int dma        = drive->using_dma;
+        u16 nsectors            = (u16)rq->nr_sectors;
         u8 lba48                = (drive->addressing == 1) ? 1 : 0;
         u8 command              = WIN_NOP;
-        ata_nsector_t           nsectors;
         ide_task_t              task;
         struct ide_taskfile     *tf = &task.tf;
 
-        nsectors.all            = (u16) rq->nr_sectors;
-
         if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) {
                 if (block + rq->nr_sectors > 1ULL << 28)
                         dma = 0;
@@ -166,14 +164,14 @@ static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
                         pr_debug("%s: LBA=0x%012llx\n", drive->name,
                                         (unsigned long long)block);
 
-                        tf->hob_nsect = nsectors.b.high;
+                        tf->hob_nsect = (nsectors >> 8) & 0xff;
                         tf->hob_lbal  = (u8)(block >> 24);
                         if (sizeof(block) != 4) {
                                 tf->hob_lbam = (u8)((u64)block >> 32);
                                 tf->hob_lbah = (u8)((u64)block >> 40);
                         }
 
-                        tf->nsect  = nsectors.b.low;
+                        tf->nsect  = nsectors & 0xff;
                         tf->lbal   = (u8) block;
                         tf->lbam   = (u8)(block >>  8);
                         tf->lbah   = (u8)(block >> 16);
@@ -185,7 +183,7 @@ static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
 #endif
                         task.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_OUT_HOB);
                 } else {
-                        tf->nsect  = nsectors.b.low;
+                        tf->nsect  = nsectors & 0xff;
                         tf->lbal   = block;
                         tf->lbam   = block >>= 8;
                         tf->lbah   = block >>= 8;
@@ -200,7 +198,7 @@ static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
 
                 pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect);
 
-                tf->nsect  = nsectors.b.low;
+                tf->nsect  = nsectors & 0xff;
                 tf->lbal   = sect;
                 tf->lbam   = cyl;
                 tf->lbah   = cyl >> 8;
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 95e302790001..239aebcfc359 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -787,11 +787,12 @@ static void idefloppy_retry_pc (ide_drive_t *drive)
 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 {
         idefloppy_floppy_t *floppy = drive->driver_data;
-        atapi_bcount_t bcount;
+        ide_hwif_t *hwif = drive->hwif;
         atapi_ireason_t ireason;
         idefloppy_pc_t *pc = floppy->pc;
         struct request *rq = pc->rq;
         unsigned int temp;
+        u16 bcount;
         u8 stat;
 
         debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n",
@@ -848,8 +849,8 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
         }
 
         /* Get the number of bytes to transfer */
-        bcount.b.high = HWIF(drive)->INB(IDE_BCOUNTH_REG);
-        bcount.b.low = HWIF(drive)->INB(IDE_BCOUNTL_REG);
+        bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) |
+                  hwif->INB(IDE_BCOUNTL_REG);
         /* on this interrupt */
         ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
 
@@ -867,13 +868,13 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
         }
         if (!test_bit(PC_WRITING, &pc->flags)) {
                 /* Reading - Check that we have enough space */
-                temp = pc->actually_transferred + bcount.all;
+                temp = pc->actually_transferred + bcount;
                 if (temp > pc->request_transfer) {
                         if (temp > pc->buffer_size) {
                                 printk(KERN_ERR "ide-floppy: The floppy wants "
                                         "to send us more data than expected "
                                         "- discarding data\n");
-                                idefloppy_discard_data(drive,bcount.all);
+                                idefloppy_discard_data(drive, bcount);
                                 BUG_ON(HWGROUP(drive)->handler != NULL);
                                 ide_set_handler(drive,
                                                 &idefloppy_pc_intr,
@@ -889,23 +890,21 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
         if (test_bit(PC_WRITING, &pc->flags)) {
                 if (pc->buffer != NULL)
                         /* Write the current buffer */
-                        HWIF(drive)->atapi_output_bytes(drive,
-                                                pc->current_position,
-                                                bcount.all);
+                        hwif->atapi_output_bytes(drive, pc->current_position,
+                                                 bcount);
                 else
-                        idefloppy_output_buffers(drive, pc, bcount.all);
+                        idefloppy_output_buffers(drive, pc, bcount);
         } else {
                 if (pc->buffer != NULL)
                         /* Read the current buffer */
-                        HWIF(drive)->atapi_input_bytes(drive,
-                                                pc->current_position,
-                                                bcount.all);
+                        hwif->atapi_input_bytes(drive, pc->current_position,
+                                                bcount);
                 else
-                        idefloppy_input_buffers(drive, pc, bcount.all);
+                        idefloppy_input_buffers(drive, pc, bcount);
         }
         /* Update the current position */
-        pc->actually_transferred += bcount.all;
-        pc->current_position += bcount.all;
+        pc->actually_transferred += bcount;
+        pc->current_position += bcount;
 
         BUG_ON(HWGROUP(drive)->handler != NULL);
         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);           /* And set the interrupt handler again */
@@ -1019,8 +1018,8 @@ 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_bcount_t bcount;
         ide_handler_t *pkt_xfer_routine;
+        u16 bcount;
         u8 dma;
 
         if (floppy->failed_pc == NULL &&
@@ -1059,7 +1058,7 @@ static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *p
         /* We haven't transferred any data yet */
         pc->actually_transferred = 0;
         pc->current_position = pc->buffer;
-        bcount.all = min(pc->request_transfer, 63 * 1024);
+        bcount = min(pc->request_transfer, 63 * 1024);
 
         if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
                 ide_dma_off(drive);
@@ -1073,8 +1072,8 @@ static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *p
                 HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG);
         /* Use PIO/DMA */
         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->OUTB((bcount >> 8) & 0xff, IDE_BCOUNTH_REG);
+        hwif->OUTB(bcount & 0xff, IDE_BCOUNTL_REG);
         HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG);
 
         if (dma) {      /* Begin DMA, if necessary */
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index 2c03f469f06e..4c24e185ccbf 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -1847,13 +1847,13 @@ static ide_startstop_t idetape_pc_intr (ide_drive_t *drive)
 {
         ide_hwif_t *hwif = drive->hwif;
         idetape_tape_t *tape = drive->driver_data;
-        atapi_bcount_t bcount;
         atapi_ireason_t ireason;
         idetape_pc_t *pc = tape->pc;
         unsigned int temp;
 #if SIMULATE_ERRORS
         static int error_sim_count = 0;
 #endif
+        u16 bcount;
         u8 stat;
 
 #if IDETAPE_DEBUG_LOG
@@ -1962,8 +1962,8 @@ static ide_startstop_t idetape_pc_intr (ide_drive_t *drive)
                 return ide_do_reset(drive);
         }
         /* Get the number of bytes to transfer on this interrupt. */
-        bcount.b.high = hwif->INB(IDE_BCOUNTH_REG);
-        bcount.b.low = hwif->INB(IDE_BCOUNTL_REG);
+        bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) |
+                  hwif->INB(IDE_BCOUNTL_REG);
 
         ireason.all = hwif->INB(IDE_IREASON_REG);
 
@@ -1981,11 +1981,11 @@ static ide_startstop_t idetape_pc_intr (ide_drive_t *drive)
         }
         if (!test_bit(PC_WRITING, &pc->flags)) {
                 /* Reading - Check that we have enough space */
-                temp = pc->actually_transferred + bcount.all;
+                temp = pc->actually_transferred + bcount;
                 if (temp > pc->request_transfer) {
                         if (temp > pc->buffer_size) {
                                 printk(KERN_ERR "ide-tape: The tape wants to send us more data than expected - discarding data\n");
-                                idetape_discard_data(drive, bcount.all);
+                                idetape_discard_data(drive, bcount);
                                 ide_set_handler(drive, &idetape_pc_intr, IDETAPE_WAIT_CMD, NULL);
                                 return ide_started;
                         }
@@ -1997,23 +1997,26 @@ static ide_startstop_t idetape_pc_intr (ide_drive_t *drive)
         }
         if (test_bit(PC_WRITING, &pc->flags)) {
                 if (pc->bh != NULL)
-                        idetape_output_buffers(drive, pc, bcount.all);
+                        idetape_output_buffers(drive, pc, bcount);
                 else
                         /* Write the current buffer */
-                        HWIF(drive)->atapi_output_bytes(drive, pc->current_position, bcount.all);
+                        hwif->atapi_output_bytes(drive, pc->current_position,
+                                                 bcount);
         } else {
                 if (pc->bh != NULL)
-                        idetape_input_buffers(drive, pc, bcount.all);
+                        idetape_input_buffers(drive, pc, bcount);
                 else
                         /* Read the current buffer */
-                        HWIF(drive)->atapi_input_bytes(drive, pc->current_position, bcount.all);
+                        hwif->atapi_input_bytes(drive, pc->current_position,
+                                                bcount);
         }
         /* Update the current position */
-        pc->actually_transferred += bcount.all;
-        pc->current_position += bcount.all;
+        pc->actually_transferred += bcount;
+        pc->current_position += bcount;
 #if IDETAPE_DEBUG_LOG
         if (tape->debug_level >= 2)
-                printk(KERN_INFO "ide-tape: [cmd %x] transferred %d bytes on that interrupt\n", pc->c[0], bcount.all);
+                printk(KERN_INFO "ide-tape: [cmd %x] transferred %d bytes "
+                                 "on that interrupt\n", pc->c[0], bcount);
 #endif
         /* And set the interrupt handler again */
         ide_set_handler(drive, &idetape_pc_intr, IDETAPE_WAIT_CMD, NULL);
@@ -2109,8 +2112,8 @@ static ide_startstop_t idetape_issue_packet_command (ide_drive_t *drive, idetape
 {
         ide_hwif_t *hwif = drive->hwif;
         idetape_tape_t *tape = drive->driver_data;
-        atapi_bcount_t bcount;
         int dma_ok = 0;
+        u16 bcount;
 
 #if IDETAPE_DEBUG_BUGS
         if (tape->pc->c[0] == IDETAPE_REQUEST_SENSE_CMD &&
@@ -2159,7 +2162,7 @@ static ide_startstop_t idetape_issue_packet_command (ide_drive_t *drive, idetape
         pc->actually_transferred = 0;
         pc->current_position = pc->buffer;
         /* Request to transfer the entire buffer at once */
-        bcount.all = pc->request_transfer;
+        bcount = pc->request_transfer;
 
         if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags)) {
                 printk(KERN_WARNING "ide-tape: DMA disabled, "
@@ -2172,8 +2175,8 @@ static ide_startstop_t idetape_issue_packet_command (ide_drive_t *drive, idetape
         if (IDE_CONTROL_REG)
                 hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
         hwif->OUTB(dma_ok ? 1 : 0, IDE_FEATURE_REG);    /* Use PIO/DMA */
-        hwif->OUTB(bcount.b.high, IDE_BCOUNTH_REG);
-        hwif->OUTB(bcount.b.low, IDE_BCOUNTL_REG);
+        hwif->OUTB((bcount >> 8) & 0xff, IDE_BCOUNTH_REG);
+        hwif->OUTB(bcount & 0xff, IDE_BCOUNTL_REG);
         hwif->OUTB(drive->select.all, IDE_SELECT_REG);
         if (dma_ok)                     /* Will begin DMA later */
                 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c
index c009f2351346..77e8a81228fc 100644
--- a/drivers/scsi/ide-scsi.c
+++ b/drivers/scsi/ide-scsi.c
@@ -395,11 +395,12 @@ static int idescsi_expiry(ide_drive_t *drive)
 static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
 {
         idescsi_scsi_t *scsi = drive_to_idescsi(drive);
-        idescsi_pc_t *pc=scsi->pc;
+        ide_hwif_t *hwif = drive->hwif;
+        idescsi_pc_t *pc = scsi->pc;
         struct request *rq = pc->rq;
-        atapi_bcount_t bcount;
         atapi_ireason_t ireason;
         unsigned int temp;
+        u16 bcount;
         u8 stat;
 
 #if IDESCSI_DEBUG_LOG
@@ -436,8 +437,8 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
                 idescsi_end_request (drive, 1, 0);
                 return ide_stopped;
         }
-        bcount.b.low    = HWIF(drive)->INB(IDE_BCOUNTL_REG);
-        bcount.b.high   = HWIF(drive)->INB(IDE_BCOUNTH_REG);
+        bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) |
+                  hwif->INB(IDE_BCOUNTL_REG);
         ireason.all     = HWIF(drive)->INB(IDE_IREASON_REG);
 
         if (ireason.b.cod) {
@@ -445,7 +446,7 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
                 return ide_do_reset (drive);
         }
         if (ireason.b.io) {
-                temp = pc->actually_transferred + bcount.all;
+                temp = pc->actually_transferred + bcount;
                 if (temp > pc->request_transfer) {
                         if (temp > pc->buffer_size) {
                                 printk(KERN_ERR "ide-scsi: The scsi wants to "
@@ -458,11 +459,13 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
                                                 idescsi_input_buffers(drive, pc, temp);
                                         else
                                                 drive->hwif->atapi_input_bytes(drive, pc->current_position, temp);
-                                        printk(KERN_ERR "ide-scsi: transferred %d of %d bytes\n", temp, bcount.all);
+                                        printk(KERN_ERR "ide-scsi: transferred"
+                                                        " %d of %d bytes\n",
+                                                        temp, bcount);
                                 }
                                 pc->actually_transferred += temp;
                                 pc->current_position += temp;
-                                idescsi_discard_data(drive, bcount.all - temp);
+                                idescsi_discard_data(drive, bcount - temp);
                                 ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry);
                                 return ide_started;
                         }
@@ -474,19 +477,21 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
         if (ireason.b.io) {
                 clear_bit(PC_WRITING, &pc->flags);
                 if (pc->sg)
-                        idescsi_input_buffers(drive, pc, bcount.all);
+                        idescsi_input_buffers(drive, pc, bcount);
                 else
-                        HWIF(drive)->atapi_input_bytes(drive, pc->current_position, bcount.all);
+                        hwif->atapi_input_bytes(drive, pc->current_position,
+                                                bcount);
         } else {
                 set_bit(PC_WRITING, &pc->flags);
                 if (pc->sg)
-                        idescsi_output_buffers (drive, pc, bcount.all);
+                        idescsi_output_buffers(drive, pc, bcount);
                 else
-                        HWIF(drive)->atapi_output_bytes(drive, pc->current_position, bcount.all);
+                        hwif->atapi_output_bytes(drive, pc->current_position,
+                                                 bcount);
         }
         /* Update the current position */
-        pc->actually_transferred += bcount.all;
-        pc->current_position += bcount.all;
+        pc->actually_transferred += bcount;
+        pc->current_position += bcount;
 
         /* And set the interrupt handler again */
         ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry);
@@ -570,13 +575,14 @@ 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_bcount_t bcount;
+        u16 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 */
+        /* Request to transfer the entire buffer at once */
+        bcount = min(pc->request_transfer, 63 * 1024);
 
         if (drive->using_dma && !idescsi_map_sg(drive, pc)) {
                 hwif->sg_mapped = 1;
@@ -589,8 +595,8 @@ static ide_startstop_t idescsi_issue_pc (ide_drive_t *drive, idescsi_pc_t *pc)
                 HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_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->OUTB((bcount >> 8) & 0xff, IDE_BCOUNTH_REG);
+        hwif->OUTB(bcount & 0xff, IDE_BCOUNTL_REG);
 
         if (dma)
                 set_bit(PC_DMA_OK, &pc->flags);
diff --git a/include/linux/ide.h b/include/linux/ide.h
index a638dde17e77..cf1a5aaebd9e 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -316,26 +316,6 @@ typedef union {
 } special_t;
 
 /*
- * ATA DATA Register Special.
- * ATA NSECTOR Count Register().
- * ATAPI Byte Count Register.
- */
-typedef union {
-        unsigned all                    :16;
-        struct {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
-                unsigned low            :8;     /* LSB */
-                unsigned high           :8;     /* MSB */
-#elif defined(__BIG_ENDIAN_BITFIELD)
-                unsigned high           :8;     /* MSB */
-                unsigned low            :8;     /* LSB */
-#else
-#error "Please fix <asm/byteorder.h>"
-#endif
-        } b;
-} ata_nsector_t, ata_data_t, atapi_bcount_t;
-
-/*
  * ATA-IDE Select Register, aka Device-Head
  *
  * head         : always zeros here