[PATCH] libata: fix passthru sense data header

sb[7] should contain the length of whole information sense data
descriptor while desc[1] should contain the number of following bytes
in the descriptor.  ie. 14 for sb[7] but 12 for desc[1].

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

drivers/ata/libata-scsi.c

@@ -713,12 +713,9 @@ void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc)
 
 	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.