diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 7a55c2e4..87f8282 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -713,12 +713,9 @@
 
 	desc[0] = 0x09;
 
-	/*
-	 * Set length of additional sense data.
-	 * Since we only populate descriptor 0, the total
-	 * length is the same (fixed) length as descriptor 0.
-	 */
-	desc[1] = sb[7] = 14;
+	/* set length of additional sense data */
+	sb[7] = 14;
+	desc[1] = 12;
 
 	/*
 	 * Copy registers into sense buffer.