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| author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-10-10 22:39:31 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-10-10 22:39:31 +0200 |
| commit | ff2779b568e70822e0ef2cc7afeeefbe7c607652 (patch) | |
| tree | b14a77664e9d4c8284805c5691017245e6c35e4b /include/linux/ata.h | |
| parent | 4b58f17d7c45a8e5f4acda641bec388398b9c0fa (diff) | |
ide: ide_id_has_flush_cache_ext() -> ata_id_flush_ext_enabled()
* 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>
Diffstat (limited to 'include/linux/ata.h')
| -rw-r--r-- | include/linux/ata.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/ata.h b/include/linux/ata.h index 921cf0fc337..81d9adeb819 100644 --- a/include/linux/ata.h +++ b/include/linux/ata.h @@ -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) |