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-rw-r--r--drivers/block/virtio_blk.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 83fa09a836c..258bc2ae288 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -298,7 +298,9 @@ static int __devinit virtblk_probe(struct virtio_device *vdev)
err = virtio_config_val(vdev, VIRTIO_BLK_F_SEG_MAX,
offsetof(struct virtio_blk_config, seg_max),
&sg_elems);
- if (err)
+
+ /* We need at least one SG element, whatever they say. */
+ if (err || !sg_elems)
sg_elems = 1;
/* We need an extra sg elements at head and tail. */