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ide: idedisk_supports_lba48() -> ata_id_lba48_enabled()

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* Add ata_id_lba48_enabled() inline helper to <linux/ata.h>.

* idedisk_supports_lba48() -> ata_id_lba48_enabled()

  The latter one also checks validity of words 83 & 86.

Cc: Jeff Garzik <jgarzik@pobox.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-10-10 22:39:30 +02:00
parent 367d7e78dd
commit 942dcd85bf
2 changed files with 15 additions and 15 deletions
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21
drivers/ide/ide-disk.c
View File

@ -383,16 +383,6 @@ static unsigned long long sectors_to_MB(unsigned long long n)
return n;
}
/*
* The same here.
*/
static inline int idedisk_supports_lba48(const u16 *id)
{
return (id[ATA_ID_COMMAND_SET_2] & 0x0400) &&
(id[ATA_ID_CFS_ENABLE_2] & 0x0400) &&
ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
}
/*
* Some disks report total number of sectors instead of
* maximum sector address. We list them here.
@ -407,7 +397,7 @@ static const struct drive_list_entry hpa_list[] = {
static void idedisk_check_hpa(ide_drive_t *drive)
{
unsigned long long capacity, set_max;
int lba48 = idedisk_supports_lba48(drive->id);
int lba48 = ata_id_lba48_enabled(drive->id);
capacity = drive->capacity64;
@ -450,7 +440,7 @@ static void init_idedisk_capacity(ide_drive_t *drive)
*/
int hpa = ata_id_hpa_enabled(id);
if (idedisk_supports_lba48(id)) {
if (ata_id_lba48_enabled(id)) {
/* drive speaks 48-bit LBA */
drive->select.b.lba = 1;
drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
@ -754,9 +744,11 @@ static int set_lba_addressing(ide_drive_t *drive, int arg)
if (drive->hwif->host_flags & IDE_HFLAG_NO_LBA48)
return 0;
if (!idedisk_supports_lba48(drive->id))
if (ata_id_lba48_enabled(drive->id) == 0)
return -EIO;
drive->addressing = arg;
return 0;
}
@ -853,8 +845,7 @@ static void idedisk_setup(ide_drive_t *drive)
capacity = idedisk_capacity(drive);
if (!drive->forced_geom) {
if (idedisk_supports_lba48(drive->id)) {
if (ata_id_lba48_enabled(drive->id)) {
/* compatibility */
drive->bios_sect = 63;
drive->bios_head = 255;

9
include/linux/ata.h
View File

@ -574,6 +574,15 @@ static inline int ata_id_has_lba48(const u16 *id)
return id[ATA_ID_COMMAND_SET_2] & (1 << 10);
}
static inline int ata_id_lba48_enabled(const u16 *id)
{
if (ata_id_has_lba48(id) == 0)
return 0;
if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
return 0;
return id[ATA_ID_CFS_ENABLE_2] & (1 << 10);
}
static inline int ata_id_hpa_enabled(const u16 *id)
{
/* Yes children, word 83 valid bits cover word 82 data */