block: remove the blk_execute_rq return value

The function only returns -EIO if rq->errors is non-zero, which is not
very useful and lets a large number of callers ignore the return value.

Just let the callers figure out their error themselves.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Bart Van Assche <Bart.VanAssche@sandisk.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

drivers/ide/ide-cd_ioctl.c

@@ -307,7 +307,8 @@ int ide_cdrom_reset(struct cdrom_device_info *cdi)
 	scsi_req_init(rq);
 	ide_req(rq)->type = ATA_PRIV_MISC;
 	rq->rq_flags = RQF_QUIET;
-	ret = blk_execute_rq(drive->queue, cd->disk, rq, 0);
+	blk_execute_rq(drive->queue, cd->disk, rq, 0);
+	ret = rq->errors ? -EIO : 0;
 	blk_put_request(rq);
 	/*
 	 * A reset will unlock the door. If it was previously locked,