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ide: ide_id_has_flush_cache_ext() -> ata_id_flush_ext_enabled()

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

* ide_id_has_flush_cache_ext() -> ata_id_flush_ext_enabled()

  The latter one also checks if the command is marked as
  supported in word 83 and 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 22:39:31 +02:00
parent 4b58f17d7c
commit ff2779b568
4 changed files with 17 additions and 8 deletions
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13
include/linux/ata.h
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@ -574,6 +574,19 @@ static inline int ata_id_has_flush_ext(const u16 *id)
return id[ATA_ID_COMMAND_SET_2] & (1 << 13);
}
static inline int ata_id_flush_ext_enabled(const u16 *id)
{
if (ata_id_has_flush_ext(id) == 0)
return 0;
if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000)
return 0;
/*
* some Maxtor disks have bit 13 defined incorrectly
* so check bit 10 too
*/
return (id[ATA_ID_CFS_ENABLE_2] & 0x2400) == 0x2400;
}
static inline int ata_id_has_lba48(const u16 *id)
{
if ((id[ATA_ID_COMMAND_SET_2] & 0xC000) != 0x4000)