diff options
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 921cf0fc337f..81d9adeb819e 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) |