block: convert blkdev_issue_flush() to use empty barriers

[firefly-linux-kernel-4.4.55.git] / drivers / scsi / sd.c

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 0a3a528212c2f3fca24f39a9951caba2f2d4e2d0..69f542c4923ce5be9c9575cc3ec30f0c82a6b92f 100644 (file)
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -826,27 +826,6 @@ static int sd_sync_cache(struct scsi_disk *sdkp)
        return 0;
 }
 
-static int sd_issue_flush(struct request_queue *q, struct gendisk *disk,
-                         sector_t *error_sector)
-{
-       int ret = 0;
-       struct scsi_device *sdp = q->queuedata;
-       struct scsi_disk *sdkp;
-
-       if (sdp->sdev_state != SDEV_RUNNING)
-               return -ENXIO;
-
-       sdkp = scsi_disk_get_from_dev(&sdp->sdev_gendev);
-
-       if (!sdkp)
-               return -ENODEV;
-
-       if (sdkp->WCE)
-               ret = sd_sync_cache(sdkp);
-       scsi_disk_put(sdkp);
-       return ret;
-}
-
 static void sd_prepare_flush(struct request_queue *q, struct request *rq)
 {
        memset(rq->cmd, 0, sizeof(rq->cmd));
@@ -1697,7 +1676,6 @@ static int sd_probe(struct device *dev)
        sd_revalidate_disk(gd);
 
        blk_queue_prep_rq(sdp->request_queue, sd_prep_fn);
-       blk_queue_issue_flush_fn(sdp->request_queue, sd_issue_flush);
 
        gd->driverfs_dev = &sdp->sdev_gendev;
        gd->flags = GENHD_FL_DRIVERFS;