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-rw-r--r--fs/nfsd/blocklayout.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/nfsd/blocklayout.c b/fs/nfsd/blocklayout.c
index fb5213afc854..47ed19c53f2e 100644
--- a/fs/nfsd/blocklayout.c
+++ b/fs/nfsd/blocklayout.c
@@ -219,6 +219,9 @@ static int nfsd4_scsi_identify_device(struct block_device *bdev,
u8 *buf, *d, type, assoc;
int error;
+ if (WARN_ON_ONCE(!blk_queue_scsi_passthrough(q)))
+ return -EINVAL;
+
buf = kzalloc(bufflen, GFP_KERNEL);
if (!buf)
return -ENOMEM;