summaryrefslogtreecommitdiffstats
path: root/include/linux/ata.h
diff options
context:
space:
mode:
authorTejun Heo <htejun@gmail.com>2006-02-12 22:47:04 +0900
committerJeff Garzik <jgarzik@pobox.com>2006-02-12 14:24:41 -0500
commit3d2ca91095f8ab6dc0cb925374eec62fa5336764 (patch)
tree4320fb9649dfbd389ea07d299288732b767534d7 /include/linux/ata.h
parent2940740bcaa5948967d261dfceec04f40b2d2fa1 (diff)
downloadop-kernel-dev-3d2ca91095f8ab6dc0cb925374eec62fa5336764.zip
op-kernel-dev-3d2ca91095f8ab6dc0cb925374eec62fa5336764.tar.gz
[PATCH] libata: separate out ata_id_major_version()
Separate out ATA major version calculation from ata_dev_identify() into ata_id_major_version(). It's preparation for splitting ata_dev_identify(). Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'include/linux/ata.h')
-rw-r--r--include/linux/ata.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/ata.h b/include/linux/ata.h
index a8155ca..b02a16c 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -267,6 +267,16 @@ struct ata_taskfile {
((u64) (id)[(n) + 1] << 16) | \
((u64) (id)[(n) + 0]) )
+static inline unsigned int ata_id_major_version(const u16 *id)
+{
+ unsigned int mver;
+
+ for (mver = 14; mver >= 1; mver--)
+ if (id[ATA_ID_MAJOR_VER] & (1 << mver))
+ break;
+ return mver;
+}
+
static inline int ata_id_current_chs_valid(const u16 *id)
{
/* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command
OpenPOWER on IntegriCloud