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    Subject[PATCH 4/5] ide: add ide_read_[alt]status() inline helpers
    Date

    Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
    ---
    drivers/ide/arm/icside.c | 2 -
    drivers/ide/ide-cd.c | 7 +++---
    drivers/ide/ide-dma.c | 3 +-
    drivers/ide/ide-floppy.c | 4 +--
    drivers/ide/ide-io.c | 12 +++++------
    drivers/ide/ide-iops.c | 39 +++++++++++++++++++++++--------------
    drivers/ide/ide-probe.c | 47 +++++++++++++++++++++++----------------------
    drivers/ide/ide-tape.c | 7 +++---
    drivers/ide/ide-taskfile.c | 30 ++++++++++++++--------------
    drivers/scsi/ide-scsi.c | 4 +--
    include/linux/ide.h | 14 +++++++++++++
    11 files changed, 100 insertions(+), 69 deletions(-)

    Index: b/drivers/ide/arm/icside.c
    ===================================================================
    --- a/drivers/ide/arm/icside.c
    +++ b/drivers/ide/arm/icside.c
    @@ -365,7 +365,7 @@ static void icside_dma_timeout(ide_drive
    if (icside_dma_test_irq(drive))
    return;

    - ide_dump_status(drive, "DMA timeout", HWIF(drive)->INB(IDE_STATUS_REG));
    + ide_dump_status(drive, "DMA timeout", ide_read_status(drive));

    icside_dma_end(drive);
    }
    Index: b/drivers/ide/ide-cd.c
    ===================================================================
    --- a/drivers/ide/ide-cd.c
    +++ b/drivers/ide/ide-cd.c
    @@ -295,7 +295,8 @@ static int cdrom_decode_status(ide_drive
    int stat, err, sense_key;

    /* Check for errors. */
    - stat = HWIF(drive)->INB(IDE_STATUS_REG);
    + stat = ide_read_status(drive);
    +
    if (stat_ret)
    *stat_ret = stat;

    @@ -692,7 +693,7 @@ int ide_cd_check_ireason(ide_drive_t *dr
    /* Some drives (ASUS) seem to tell us that status
    * info is available. just get it and ignore.
    */
    - (void) HWIF(drive)->INB(IDE_STATUS_REG);
    + (void)ide_read_status(drive);
    return 0;
    } else {
    /* Drive wants a command packet, or invalid ireason... */
    @@ -1326,7 +1327,7 @@ ide_do_rw_cdrom (ide_drive_t *drive, str
    if (blk_fs_request(rq)) {
    if (info->cd_flags & IDE_CD_FLAG_SEEKING) {
    unsigned long elapsed = jiffies - info->start_seek;
    - int stat = HWIF(drive)->INB(IDE_STATUS_REG);
    + int stat = ide_read_status(drive);

    if ((stat & SEEK_STAT) != SEEK_STAT) {
    if (elapsed < IDECD_SEEK_TIMEOUT) {
    Index: b/drivers/ide/ide-dma.c
    ===================================================================
    --- a/drivers/ide/ide-dma.c
    +++ b/drivers/ide/ide-dma.c
    @@ -147,7 +147,8 @@ ide_startstop_t ide_dma_intr (ide_drive_
    u8 stat = 0, dma_stat = 0;

    dma_stat = HWIF(drive)->ide_dma_end(drive);
    - stat = HWIF(drive)->INB(IDE_STATUS_REG); /* get drive status */
    + stat = ide_read_status(drive);
    +
    if (OK_STAT(stat,DRIVE_READY,drive->bad_wstat|DRQ_STAT)) {
    if (!dma_stat) {
    struct request *rq = HWGROUP(drive)->rq;
    Index: b/drivers/ide/ide-floppy.c
    ===================================================================
    --- a/drivers/ide/ide-floppy.c
    +++ b/drivers/ide/ide-floppy.c
    @@ -503,7 +503,7 @@ static ide_startstop_t idefloppy_pc_intr
    }

    /* Clear the interrupt */
    - stat = drive->hwif->INB(IDE_STATUS_REG);
    + stat = ide_read_status(drive);

    /* No more interrupts */
    if ((stat & DRQ_STAT) == 0) {
    @@ -1247,7 +1247,7 @@ static int idefloppy_get_format_progress
    u8 stat;

    local_irq_save(flags);
    - stat = drive->hwif->INB(IDE_STATUS_REG);
    + stat = ide_read_status(drive);
    local_irq_restore(flags);

    progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
    Index: b/drivers/ide/ide-io.c
    ===================================================================
    --- a/drivers/ide/ide-io.c
    +++ b/drivers/ide/ide-io.c
    @@ -466,7 +466,7 @@ static ide_startstop_t ide_ata_error(ide
    return ide_stopped;
    }

    - if (hwif->INB(IDE_STATUS_REG) & (BUSY_STAT|DRQ_STAT))
    + if (ide_read_status(drive) & (BUSY_STAT | DRQ_STAT))
    rq->errors |= ERROR_RESET;

    if ((rq->errors & ERROR_RESET) == ERROR_RESET) {
    @@ -493,7 +493,7 @@ static ide_startstop_t ide_atapi_error(i
    /* add decoding error stuff */
    }

    - if (hwif->INB(IDE_STATUS_REG) & (BUSY_STAT|DRQ_STAT))
    + if (ide_read_status(drive) & (BUSY_STAT | DRQ_STAT))
    /* force an abort */
    hwif->OUTB(WIN_IDLEIMMEDIATE, IDE_COMMAND_REG);

    @@ -821,8 +821,7 @@ static ide_startstop_t execute_drive_cmd
    #ifdef DEBUG
    printk("%s: DRIVE_CMD (null)\n", drive->name);
    #endif
    - ide_end_drive_cmd(drive,
    - hwif->INB(IDE_STATUS_REG),
    + ide_end_drive_cmd(drive, ide_read_status(drive),
    hwif->INB(IDE_ERROR_REG));
    return ide_stopped;
    }
    @@ -1231,7 +1230,7 @@ static ide_startstop_t ide_dma_timeout_r
    printk(KERN_WARNING "%s: DMA timeout error\n", drive->name);
    (void)HWIF(drive)->ide_dma_end(drive);
    ret = ide_error(drive, "dma timeout error",
    - hwif->INB(IDE_STATUS_REG));
    + ide_read_status(drive));
    } else {
    printk(KERN_WARNING "%s: DMA timeout retry\n", drive->name);
    hwif->dma_timeout(drive);
    @@ -1355,7 +1354,8 @@ void ide_timer_expiry (unsigned long dat
    startstop = ide_dma_timeout_retry(drive, wait);
    } else
    startstop =
    - ide_error(drive, "irq timeout", hwif->INB(IDE_STATUS_REG));
    + ide_error(drive, "irq timeout",
    + ide_read_status(drive));
    }
    drive->service_time = jiffies - drive->service_start;
    spin_lock_irq(&ide_lock);
    Index: b/drivers/ide/ide-iops.c
    ===================================================================
    --- a/drivers/ide/ide-iops.c
    +++ b/drivers/ide/ide-iops.c
    @@ -430,10 +430,10 @@ int drive_is_ready (ide_drive_t *drive)
    * about possible isa-pnp and pci-pnp issues yet.
    */
    if (IDE_CONTROL_REG)
    - stat = hwif->INB(IDE_ALTSTATUS_REG);
    + stat = ide_read_altstatus(drive);
    else
    /* Note: this may clear a pending IRQ!! */
    - stat = hwif->INB(IDE_STATUS_REG);
    + stat = ide_read_status(drive);

    if (stat & BUSY_STAT)
    /* drive busy: definitely not interrupting */
    @@ -458,23 +458,24 @@ EXPORT_SYMBOL(drive_is_ready);
    */
    static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat)
    {
    - ide_hwif_t *hwif = drive->hwif;
    unsigned long flags;
    int i;
    u8 stat;

    udelay(1); /* spec allows drive 400ns to assert "BUSY" */
    - if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) {
    + stat = ide_read_status(drive);
    +
    + if (stat & BUSY_STAT) {
    local_irq_set(flags);
    timeout += jiffies;
    - while ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) {
    + while ((stat = ide_read_status(drive)) & BUSY_STAT) {
    if (time_after(jiffies, timeout)) {
    /*
    * One last read after the timeout in case
    * heavy interrupt load made us not make any
    * progress during the timeout..
    */
    - stat = hwif->INB(IDE_STATUS_REG);
    + stat = ide_read_status(drive);
    if (!(stat & BUSY_STAT))
    break;

    @@ -494,7 +495,9 @@ static int __ide_wait_stat(ide_drive_t *
    */
    for (i = 0; i < 10; i++) {
    udelay(1);
    - if (OK_STAT((stat = hwif->INB(IDE_STATUS_REG)), good, bad)) {
    + stat = ide_read_status(drive);
    +
    + if (OK_STAT(stat, good, bad)) {
    *rstat = stat;
    return 0;
    }
    @@ -617,6 +620,7 @@ int ide_driveid_update(ide_drive_t *driv
    ide_hwif_t *hwif = drive->hwif;
    struct hd_driveid *id;
    unsigned long timeout, flags;
    + u8 stat;

    /*
    * Re-read drive->id for possible DMA mode
    @@ -633,10 +637,15 @@ int ide_driveid_update(ide_drive_t *driv
    SELECT_MASK(drive, 0);
    return 0; /* drive timed-out */
    }
    +
    msleep(50); /* give drive a breather */
    - } while (hwif->INB(IDE_ALTSTATUS_REG) & BUSY_STAT);
    + stat = ide_read_altstatus(drive);
    + } while (stat & BUSY_STAT);
    +
    msleep(50); /* wait for IRQ and DRQ_STAT */
    - if (!OK_STAT(hwif->INB(IDE_STATUS_REG),DRQ_STAT,BAD_R_STAT)) {
    + stat = ide_read_status(drive);
    +
    + if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) {
    SELECT_MASK(drive, 0);
    printk("%s: CHECK for good STATUS\n", drive->name);
    return 0;
    @@ -649,7 +658,7 @@ int ide_driveid_update(ide_drive_t *driv
    return 0;
    }
    ata_input_data(drive, id, SECTOR_WORDS);
    - (void) hwif->INB(IDE_STATUS_REG); /* clear drive IRQ */
    + (void)ide_read_status(drive); /* clear drive IRQ */
    local_irq_enable();
    local_irq_restore(flags);
    ide_fix_driveid(id);
    @@ -850,15 +859,15 @@ static ide_startstop_t do_reset1 (ide_dr
    static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive)
    {
    ide_hwgroup_t *hwgroup = HWGROUP(drive);
    - ide_hwif_t *hwif = HWIF(drive);
    u8 stat;

    SELECT_DRIVE(drive);
    udelay (10);
    + stat = ide_read_status(drive);

    - if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG), 0, BUSY_STAT)) {
    + if (OK_STAT(stat, 0, BUSY_STAT))
    printk("%s: ATAPI reset complete\n", drive->name);
    - } else {
    + else {
    if (time_before(jiffies, hwgroup->poll_timeout)) {
    ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
    /* continue polling */
    @@ -897,7 +906,9 @@ static ide_startstop_t reset_pollfunc (i
    }
    }

    - if (!OK_STAT(tmp = hwif->INB(IDE_STATUS_REG), 0, BUSY_STAT)) {
    + tmp = ide_read_status(drive);
    +
    + if (!OK_STAT(tmp, 0, BUSY_STAT)) {
    if (time_before(jiffies, hwgroup->poll_timeout)) {
    ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
    /* continue polling */
    Index: b/drivers/ide/ide-probe.c
    ===================================================================
    --- a/drivers/ide/ide-probe.c
    +++ b/drivers/ide/ide-probe.c
    @@ -264,8 +264,7 @@ err_misc:
    static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
    {
    ide_hwif_t *hwif = HWIF(drive);
    - int rc;
    - unsigned long hd_status;
    + int use_altstatus = 0, rc;
    unsigned long timeout;
    u8 s = 0, a = 0;

    @@ -273,19 +272,17 @@ static int actual_try_to_identify (ide_d
    msleep(50);

    if (IDE_CONTROL_REG) {
    - a = hwif->INB(IDE_ALTSTATUS_REG);
    - s = hwif->INB(IDE_STATUS_REG);
    - if ((a ^ s) & ~INDEX_STAT) {
    - printk(KERN_INFO "%s: probing with STATUS(0x%02x) instead of "
    - "ALTSTATUS(0x%02x)\n", drive->name, s, a);
    + a = ide_read_altstatus(drive);
    + s = ide_read_status(drive);
    + if ((a ^ s) & ~INDEX_STAT)
    /* ancient Seagate drives, broken interfaces */
    - hd_status = IDE_STATUS_REG;
    - } else {
    + printk(KERN_INFO "%s: probing with STATUS(0x%02x) "
    + "instead of ALTSTATUS(0x%02x)\n",
    + drive->name, s, a);
    + else
    /* use non-intrusive polling */
    - hd_status = IDE_ALTSTATUS_REG;
    - }
    - } else
    - hd_status = IDE_STATUS_REG;
    + use_altstatus = 1;
    + }

    /* set features register for atapi
    * identify command to be sure of reply
    @@ -306,11 +303,15 @@ static int actual_try_to_identify (ide_d
    }
    /* give drive a breather */
    msleep(50);
    - } while ((hwif->INB(hd_status)) & BUSY_STAT);
    + s = use_altstatus ? ide_read_altstatus(drive)
    + : ide_read_status(drive);
    + } while (s & BUSY_STAT);

    /* wait for IRQ and DRQ_STAT */
    msleep(50);
    - if (OK_STAT((hwif->INB(IDE_STATUS_REG)), DRQ_STAT, BAD_R_STAT)) {
    + s = ide_read_status(drive);
    +
    + if (OK_STAT(s, DRQ_STAT, BAD_R_STAT)) {
    unsigned long flags;

    /* local CPU only; some systems need this */
    @@ -320,7 +321,7 @@ static int actual_try_to_identify (ide_d
    /* drive responded with ID */
    rc = 0;
    /* clear drive IRQ */
    - (void) hwif->INB(IDE_STATUS_REG);
    + (void)ide_read_status(drive);
    local_irq_restore(flags);
    } else {
    /* drive refused ID */
    @@ -367,7 +368,7 @@ static int try_to_identify (ide_drive_t

    ide_set_irq(drive, 0);
    /* clear drive IRQ */
    - (void) hwif->INB(IDE_STATUS_REG);
    + (void)ide_read_status(drive);
    udelay(5);
    irq = probe_irq_off(cookie);
    if (!hwif->irq) {
    @@ -455,7 +456,9 @@ static int do_probe (ide_drive_t *drive,
    return 3;
    }

    - if (OK_STAT((hwif->INB(IDE_STATUS_REG)), READY_STAT, BUSY_STAT) ||
    + stat = ide_read_status(drive);
    +
    + if (OK_STAT(stat, READY_STAT, BUSY_STAT) ||
    drive->present || cmd == WIN_PIDENTIFY) {
    /* send cmd and wait */
    if ((rc = try_to_identify(drive, cmd))) {
    @@ -463,7 +466,7 @@ static int do_probe (ide_drive_t *drive,
    rc = try_to_identify(drive,cmd);
    }

    - stat = hwif->INB(IDE_STATUS_REG);
    + stat = ide_read_status(drive);

    if (stat == (BUSY_STAT | READY_STAT))
    return 4;
    @@ -482,7 +485,7 @@ static int do_probe (ide_drive_t *drive,
    }

    /* ensure drive IRQ is clear */
    - stat = hwif->INB(IDE_STATUS_REG);
    + stat = ide_read_status(drive);

    if (rc == 1)
    printk(KERN_ERR "%s: no response (status = 0x%02x)\n",
    @@ -496,7 +499,7 @@ static int do_probe (ide_drive_t *drive,
    SELECT_DRIVE(&hwif->drives[0]);
    msleep(50);
    /* ensure drive irq is clear */
    - (void) hwif->INB(IDE_STATUS_REG);
    + (void)ide_read_status(drive);
    }
    return rc;
    }
    @@ -521,7 +524,7 @@ static void enable_nest (ide_drive_t *dr

    msleep(50);

    - stat = hwif->INB(IDE_STATUS_REG);
    + stat = ide_read_status(drive);

    if (!OK_STAT(stat, 0, BAD_STAT))
    printk(KERN_CONT "failed (status = 0x%02x)\n", stat);
    Index: b/drivers/ide/ide-tape.c
    ===================================================================
    --- a/drivers/ide/ide-tape.c
    +++ b/drivers/ide/ide-tape.c
    @@ -1178,7 +1178,7 @@ static ide_startstop_t idetape_pc_intr (
    #endif /* IDETAPE_DEBUG_LOG */

    /* Clear the interrupt */
    - stat = hwif->INB(IDE_STATUS_REG);
    + stat = ide_read_status(drive);

    if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
    if (hwif->ide_dma_end(drive) || (stat & ERR_STAT)) {
    @@ -1598,7 +1598,8 @@ static ide_startstop_t idetape_media_acc
    idetape_pc_t *pc = tape->pc;
    u8 stat;

    - stat = drive->hwif->INB(IDE_STATUS_REG);
    + stat = ide_read_status(drive);
    +
    if (stat & SEEK_STAT) {
    if (stat & ERR_STAT) {
    /* Error detected */
    @@ -1758,7 +1759,7 @@ static ide_startstop_t idetape_do_reques
    * If the tape is still busy, postpone our request and service
    * the other device meanwhile.
    */
    - stat = drive->hwif->INB(IDE_STATUS_REG);
    + stat = ide_read_status(drive);

    if (!drive->dsc_overlap && !(rq->cmd[0] & REQ_IDETAPE_PC2))
    set_bit(IDETAPE_IGNORE_DSC, &tape->flags);
    Index: b/drivers/ide/ide-taskfile.c
    ===================================================================
    --- a/drivers/ide/ide-taskfile.c
    +++ b/drivers/ide/ide-taskfile.c
    @@ -189,12 +189,11 @@ EXPORT_SYMBOL_GPL(do_rw_taskfile);
    */
    static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
    {
    - ide_hwif_t *hwif = HWIF(drive);
    - u8 stat;
    + u8 stat = ide_read_status(drive);

    - if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
    + if (OK_STAT(stat, READY_STAT, BAD_STAT))
    drive->mult_count = drive->mult_req;
    - } else {
    + else {
    drive->mult_req = drive->mult_count = 0;
    drive->special.b.recalibrate = 1;
    (void) ide_dump_status(drive, "set_multmode", stat);
    @@ -207,11 +206,10 @@ static ide_startstop_t set_multmode_intr
    */
    static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
    {
    - ide_hwif_t *hwif = HWIF(drive);
    int retries = 5;
    u8 stat;

    - while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
    + while (((stat = ide_read_status(drive)) & BUSY_STAT) && retries--)
    udelay(10);

    if (OK_STAT(stat, READY_STAT, BAD_STAT))
    @@ -230,10 +228,9 @@ static ide_startstop_t set_geometry_intr
    */
    static ide_startstop_t recal_intr(ide_drive_t *drive)
    {
    - ide_hwif_t *hwif = HWIF(drive);
    - u8 stat;
    + u8 stat = ide_read_status(drive);

    - if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
    + if (!OK_STAT(stat, READY_STAT, BAD_STAT))
    return ide_error(drive, "recal_intr", stat);
    return ide_stopped;
    }
    @@ -248,10 +245,12 @@ static ide_startstop_t task_no_data_intr
    u8 stat;

    local_irq_enable_in_hardirq();
    - if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
    + stat = ide_read_status(drive);
    +
    + if (!OK_STAT(stat, READY_STAT, BAD_STAT))
    return ide_error(drive, "task_no_data_intr", stat);
    /* calls ide_end_drive_cmd */
    - }
    +
    if (args)
    ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));

    @@ -260,7 +259,6 @@ static ide_startstop_t task_no_data_intr

    u8 wait_drive_not_busy(ide_drive_t *drive)
    {
    - ide_hwif_t *hwif = HWIF(drive);
    int retries;
    u8 stat;

    @@ -269,7 +267,9 @@ u8 wait_drive_not_busy(ide_drive_t *driv
    * This can take up to 10 usec, but we will wait max 1 ms.
    */
    for (retries = 0; retries < 100; retries++) {
    - if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
    + stat = ide_read_status(drive);
    +
    + if (stat & BUSY_STAT)
    udelay(10);
    else
    break;
    @@ -430,7 +430,7 @@ static ide_startstop_t task_in_intr(ide_
    {
    ide_hwif_t *hwif = drive->hwif;
    struct request *rq = HWGROUP(drive)->rq;
    - u8 stat = hwif->INB(IDE_STATUS_REG);
    + u8 stat = ide_read_status(drive);

    /* new way for dealing with premature shared PCI interrupts */
    if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) {
    @@ -465,7 +465,7 @@ static ide_startstop_t task_out_intr (id
    {
    ide_hwif_t *hwif = drive->hwif;
    struct request *rq = HWGROUP(drive)->rq;
    - u8 stat = hwif->INB(IDE_STATUS_REG);
    + u8 stat = ide_read_status(drive);

    if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
    return task_error(drive, rq, __FUNCTION__, stat);
    Index: b/drivers/scsi/ide-scsi.c
    ===================================================================
    --- a/drivers/scsi/ide-scsi.c
    +++ b/drivers/scsi/ide-scsi.c
    @@ -287,7 +287,7 @@ static int idescsi_end_request(ide_drive
    static ide_startstop_t
    idescsi_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err)
    {
    - if (HWIF(drive)->INB(IDE_STATUS_REG) & (BUSY_STAT|DRQ_STAT))
    + if (ide_read_status(drive) & (BUSY_STAT | DRQ_STAT))
    /* force an abort */
    HWIF(drive)->OUTB(WIN_IDLEIMMEDIATE,IDE_COMMAND_REG);

    @@ -423,7 +423,7 @@ static ide_startstop_t idescsi_pc_intr (
    }

    /* Clear the interrupt */
    - stat = drive->hwif->INB(IDE_STATUS_REG);
    + stat = ide_read_status(drive);

    if ((stat & DRQ_STAT) == 0) {
    /* No more interrupts */
    Index: b/include/linux/ide.h
    ===================================================================
    --- a/include/linux/ide.h
    +++ b/include/linux/ide.h
    @@ -1311,4 +1311,18 @@ static inline void ide_set_irq(ide_drive
    drive->hwif->OUTB(drive->ctl | (on ? 0 : 2), IDE_CONTROL_REG);
    }

    +static inline u8 ide_read_status(ide_drive_t *drive)
    +{
    + ide_hwif_t *hwif = drive->hwif;
    +
    + return hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
    +}
    +
    +static inline u8 ide_read_altstatus(ide_drive_t *drive)
    +{
    + ide_hwif_t *hwif = drive->hwif;
    +
    + return hwif->INB(hwif->io_ports[IDE_CONTROL_OFFSET]);
    +}
    +
    #endif /* _IDE_H */

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