diff options
| -rw-r--r-- | drivers/scsi/libata-core.c | 6 | ||||
| -rw-r--r-- | include/linux/ata.h | 10 |
2 files changed, 11 insertions, 5 deletions
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index 4df5024c388..d87854e199f 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -927,7 +927,6 @@ static void ata_dev_identify(struct ata_port *ap, unsigned int device) { struct ata_device *dev = &ap->device[device]; unsigned int major_version; - u16 tmp; unsigned long xfer_modes; unsigned int using_edd; struct ata_taskfile tf; @@ -1030,10 +1029,7 @@ retry: goto err_out_nosup; /* get major version */ - tmp = dev->id[ATA_ID_MAJOR_VER]; - for (major_version = 14; major_version >= 1; major_version--) - if (tmp & (1 << major_version)) - break; + major_version = ata_id_major_version(dev->id); /* * The exact sequence expected by certain pre-ATA4 drives is: diff --git a/include/linux/ata.h b/include/linux/ata.h index a8155ca4947..b02a16c435e 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 |