diff options
Diffstat (limited to 'include/linux/ata.h')
| -rw-r--r-- | include/linux/ata.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/include/linux/ata.h b/include/linux/ata.h index be00973d1a8c..d28aad991c75 100644 --- a/include/linux/ata.h +++ b/include/linux/ata.h @@ -645,7 +645,15 @@ static inline unsigned int ata_id_major_version(const u16 *id) static inline int ata_id_is_sata(const u16 *id) { - return ata_id_major_version(id) >= 5 && id[ATA_ID_HW_CONFIG] == 0; + /* + * See if word 93 is 0 AND drive is at least ATA-5 compatible + * verifying that word 80 by casting it to a signed type -- + * this trick allows us to filter out the reserved values of + * 0x0000 and 0xffff along with the earlier ATA revisions... + */ + if (id[ATA_ID_HW_CONFIG] == 0 && (short)id[ATA_ID_MAJOR_VER] >= 0x0020) + return 1; + return 0; } static inline int ata_id_has_tpm(const u16 *id) |