Merge branch 'virtio' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux...

[sfrench/cifs-2.6.git] / drivers / block / virtio_blk.c

diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 83fa09a836ca8574a3696c888d7574a833b35447..258bc2ae2885625a1650cebcabb4b9eb975092bb 100644 (file)
--- 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. */