virtio_blk: use UINT_MAX instead of -1U

We use UINT_MAX to limit max_discard_sectors in virtblk_probe,
we can use UINT_MAX to limit max_hw_sectors for consistencies.

No functional change intended.

Signed-off-by: Angus Chen <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Michael S. Tsirkin <[email protected]>
Reviewed-by: Stefan Hajnoczi <[email protected]>

Author: Angus Chen

drivers/block/virtio_blk.c

@@ -994,7 +994,7 @@ static int virtblk_probe(struct virtio_device *vdev)
 	blk_queue_max_segments(q, sg_elems);
 
 	/* No real sector limit. */
-	blk_queue_max_hw_sectors(q, -1U);
+	blk_queue_max_hw_sectors(q, UINT_MAX);
 
 	max_size = virtio_max_dma_size(vdev);