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| author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-10-10 22:39:30 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-10-10 22:39:30 +0200 |
| commit | 942dcd85bf8edf38cdc3745306ca250684d99a61 (patch) | |
| tree | 4d43552e3805c1df8585bb4056d6076dc56e5f09 /include/linux/ata.h | |
| parent | 367d7e78dd48cf6ad35182a99d97abb5486e040e (diff) | |
| download | lwn-942dcd85bf8edf38cdc3745306ca250684d99a61.tar.gz lwn-942dcd85bf8edf38cdc3745306ca250684d99a61.zip | |
ide: idedisk_supports_lba48() -> ata_id_lba48_enabled()
* Add ata_id_lba48_enabled() inline helper to <linux/ata.h>.
* idedisk_supports_lba48() -> ata_id_lba48_enabled()
The latter one also checks 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 | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/ata.h b/include/linux/ata.h index d28aad991c75..8162257b474f 100644 --- a/include/linux/ata.h +++ b/include/linux/ata.h @@ -574,6 +574,15 @@ static inline int ata_id_has_lba48(const u16 *id) return id[ATA_ID_COMMAND_SET_2] & (1 << 10); } +static inline int ata_id_lba48_enabled(const u16 *id) +{ + if (ata_id_has_lba48(id) == 0) + return 0; + if ((id[ATA_ID_CSF_DEFAULT] & 0xC000) != 0x4000) + return 0; + return id[ATA_ID_CFS_ENABLE_2] & (1 << 10); +} + static inline int ata_id_hpa_enabled(const u16 *id) { /* Yes children, word 83 valid bits cover word 82 data */ |