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[PATCH] libata: separate out ata_id_major_version()

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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>
This commit is contained in:
Tejun Heo
2006-02-12 22:47:04 +09:00
committed by Jeff Garzik
parent 2940740bca
commit 3d2ca91095
2 changed files with 11 additions and 5 deletions
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10
include/linux/ata.h
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@ -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