libata: straighten out ATA_ID_* constants

* Kill _OFS suffixes in ATA_ID_{SERNO|FW_REV|PROD}_OFS for consistency
  with other ATA_ID_* constants.

* Kill ATA_SERNO_LEN

* Add and use ATA_ID_SERNO_LEN, ATA_ID_FW_REV_LEN and ATA_ID_PROD_LEN.
  This change also makes ata_device_blacklisted() use proper length
  for fwrev.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/ata/pata_it821x.c b/drivers/ata/pata_it821x.c
index e8afd486434a..c84dfaede89c 100644
--- a/drivers/ata/pata_it821x.c
+++ b/drivers/ata/pata_it821x.c
@@ -531,15 +531,14 @@ static int it821x_smart_set_mode(struct ata_port *ap, struct ata_device **unused
 
 static void it821x_dev_config(struct ata_port *ap, struct ata_device *adev)
 {
-        unsigned char model_num[40];
+        unsigned char model_num[ATA_ID_PROD_LEN];
         char *s;
         unsigned int len;
 
         /* This block ought to be a library routine as it is in several
            drivers now */
 
-        ata_id_string(adev->id, model_num, ATA_ID_PROD_OFS,
-                          sizeof(model_num));
+        ata_id_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num));
         s = &model_num[0];
         len = strnlen(s, sizeof(model_num));