[PATCH] libata-dev: wait idle after reading the last data block

Some CD-ROM drives are slow to clear DRQ, after the last data block
is read by PIO. Use ata_wait_idle() after reading the last data block.

Signed-off-by: Albert Lee <albertcc@tw.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/scsi/libata-core.c

@@ -3710,7 +3710,7 @@ fsm_start:
 			    (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
 				/* all data read */
 				ata_altstatus(ap);
-				status = ata_chk_status(ap);
+				status = ata_wait_idle(ap);
 				goto fsm_start;
 			}
 		}