Add a function to check an ATA device's id for head unload support as specified in ATA-7. Signed-off-by: Elias Oltmanns <eo@xxxxxxxxxxxxxx> --- include/linux/ata.h | 9 +++++++++ 1 files changed, 9 insertions(+), 0 deletions(-) diff --git a/include/linux/ata.h b/include/linux/ata.h index cea079c..c66a7d6 100644 --- a/include/linux/ata.h +++ b/include/linux/ata.h @@ -707,6 +707,15 @@ static inline int ata_id_has_dword_io(const u16 *id) return 0; } +static inline int ata_id_has_unload(const u16 *id) +{ + if (ata_id_major_version(id) >= 7 && + (id[ATA_ID_CFSSE] & 0xC000) == 0x4000 && + id[ATA_ID_CFSSE] & (1 << 13)) + return 1; + return 0; +} + static inline int ata_id_current_chs_valid(const u16 *id) { /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html