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-rw-r--r--fs/nfs/blocklayout/dev.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/nfs/blocklayout/dev.c b/fs/nfs/blocklayout/dev.c
index f318a05a80e1..c97ebc42ec0f 100644
--- a/fs/nfs/blocklayout/dev.c
+++ b/fs/nfs/blocklayout/dev.c
@@ -351,6 +351,9 @@ bl_parse_scsi(struct nfs_server *server, struct pnfs_block_dev *d,
d->map = bl_map_simple;
d->pr_key = v->scsi.pr_key;
+ if (d->len == 0)
+ return -ENODEV;
+
pr_info("pNFS: using block device %s (reservation key 0x%llx)\n",
d->bdev_handle->bdev->bd_disk->disk_name, d->pr_key);