NFSD: use correct reservation type in nfsd4_scsi_fence_client

The reservation type argument for the pr_preempt call should match the
one used in nfsd4_block_get_device_info_scsi.

Fixes: f99d4fb ("nfsd: add SCSI layout support")
Cc: [email protected]
Signed-off-by: Dai Ngo <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Chuck Lever <[email protected]>

Author: daimngo

fs/nfsd/blocklayout.c

@@ -400,7 +400,8 @@ nfsd4_scsi_fence_client(struct nfs4_layout_stateid *ls, struct nfsd_file *file)
 	struct block_device *bdev = file->nf_file->f_path.mnt->mnt_sb->s_bdev;
 
 	bdev->bd_disk->fops->pr_ops->pr_preempt(bdev, NFSD_MDS_PR_KEY,
-			nfsd4_scsi_pr_key(clp), 0, true);
+			nfsd4_scsi_pr_key(clp),
+			PR_EXCLUSIVE_ACCESS_REG_ONLY, true);
 }
 
 const struct nfsd4_layout_ops scsi_layout_ops = {