[PATCH] libata: move cdb_len for host to device

cdb_len is per-device property.  Sharing cdb_len on ap results in
inaccurate configuration on revalidation and hotplugging.  This patch
makes cdb_len per-device.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
index 24a54a5a91b8..23caa0c4019b 100644
--- a/drivers/scsi/ahci.c
+++ b/drivers/scsi/ahci.c
@@ -617,7 +617,8 @@ static void ahci_qc_prep(struct ata_queued_cmd *qc)
         ata_tf_to_fis(&qc->tf, pp->cmd_tbl, 0);
         if (is_atapi) {
                 memset(pp->cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
-                memcpy(pp->cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, ap->cdb_len);
+                memcpy(pp->cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb,
+                       qc->dev->cdb_len);
         }
 
         n_elem = 0;