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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-10-10 22:39:30 +0200
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-10-10 22:39:30 +0200
commit942dcd85bf8edf38cdc3745306ca250684d99a61 (patch)
tree4d43552e3805c1df8585bb4056d6076dc56e5f09 /include/linux/ata.h
parent367d7e78dd48cf6ad35182a99d97abb5486e040e (diff)
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.h9
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 */