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ide: fix registers loading order in ide_dump_ata_status()
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Fix registers loading order in ide_dump_ata_status()/ide_read_24().

Load registers in this order:
* IDE_SECTOR_REG
* IDE_LCYL_REG
* IDE_HCYL_REG
* IDE_SELECT_REG

It shouldn't affect anything (just a usual paranoia to separate changes
which change the way in which hardware is accessed from code cleanups).

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Bartlomiej Zolnierkiewicz committed Jan 25, 2008
1 parent f6e29e3 commit d324447
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Showing 2 changed files with 16 additions and 11 deletions.
4 changes: 2 additions & 2 deletions drivers/ide/ide-iops.c
Original file line number Diff line number Diff line change
Expand Up @@ -160,9 +160,9 @@ EXPORT_SYMBOL(default_hwif_mmiops);

u32 ide_read_24 (ide_drive_t *drive)
{
u8 hcyl = HWIF(drive)->INB(IDE_HCYL_REG);
u8 lcyl = HWIF(drive)->INB(IDE_LCYL_REG);
u8 sect = HWIF(drive)->INB(IDE_SECTOR_REG);
u8 lcyl = HWIF(drive)->INB(IDE_LCYL_REG);
u8 hcyl = HWIF(drive)->INB(IDE_HCYL_REG);
return (hcyl<<16)|(lcyl<<8)|sect;
}

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23 changes: 14 additions & 9 deletions drivers/ide/ide-lib.c
Original file line number Diff line number Diff line change
Expand Up @@ -524,19 +524,24 @@ static u8 ide_dump_ata_status(ide_drive_t *drive, const char *msg, u8 stat)
(unsigned long long) sectors,
high, low);
} else {
u8 cur = hwif->INB(IDE_SELECT_REG);
u8 sector, lcyl, hcyl, cur;

sector = hwif->INB(IDE_SECTOR_REG);
lcyl = hwif->INB(IDE_LCYL_REG);
hcyl = hwif->INB(IDE_HCYL_REG);
cur = hwif->INB(IDE_SELECT_REG);

if (cur & 0x40) { /* using LBA? */
printk(", LBAsect=%ld", (unsigned long)
((cur&0xf)<<24)
|(hwif->INB(IDE_HCYL_REG)<<16)
|(hwif->INB(IDE_LCYL_REG)<<8)
| hwif->INB(IDE_SECTOR_REG));
((cur & 0xf) << 24) |
(hcyl << 16) |
(lcyl << 8) |
sector);
} else {
printk(", CHS=%d/%d/%d",
(hwif->INB(IDE_HCYL_REG)<<8) +
hwif->INB(IDE_LCYL_REG),
cur & 0xf,
hwif->INB(IDE_SECTOR_REG));
(hcyl << 8) + lcyl,
cur & 0xf,
sector);
}
}
if (HWGROUP(drive) && HWGROUP(drive)->rq)
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