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-rw-r--r--drivers/block/virtio_blk.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index b16a887bbd02..4bc083b7c9b5 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -723,7 +723,7 @@ static int virtblk_probe(struct virtio_device *vdev)
struct request_queue *q;
int err, index;
- u32 v, blk_size, sg_elems, opt_io_size;
+ u32 v, blk_size, max_size, sg_elems, opt_io_size;
u16 min_io_size;
u8 physical_block_exp, alignment_offset;
@@ -826,14 +826,16 @@ static int virtblk_probe(struct virtio_device *vdev)
/* No real sector limit. */
blk_queue_max_hw_sectors(q, -1U);
+ max_size = virtio_max_dma_size(vdev);
+
/* Host can optionally specify maximum segment size and number of
* segments. */
err = virtio_cread_feature(vdev, VIRTIO_BLK_F_SIZE_MAX,
struct virtio_blk_config, size_max, &v);
if (!err)
- blk_queue_max_segment_size(q, v);
- else
- blk_queue_max_segment_size(q, -1U);
+ max_size = min(max_size, v);
+
+ blk_queue_max_segment_size(q, max_size);
/* Host can optionally specify the block size of the device */
err = virtio_cread_feature(vdev, VIRTIO_BLK_F_BLK_SIZE,