NFS: add dreq to nfs_commit_info

Need this to pass into nfs_commitdata_init, in order to keep data->dreq
accurate.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 333d01d..44a93d8 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -506,6 +506,7 @@
 	cinfo->lock = &inode->i_lock;
 	cinfo->mds = &NFS_I(inode)->commit_info;
 	cinfo->ds = pnfs_get_ds_info(inode);
+	cinfo->dreq = NULL;
 	cinfo->completion_ops = &nfs_commit_completion_ops;
 }
 
@@ -1431,6 +1432,7 @@
 	data->lseg	  = lseg; /* reference transferred */
 	data->mds_ops     = &nfs_commit_ops;
 	data->completion_ops = cinfo->completion_ops;
+	data->dreq	  = cinfo->dreq;
 
 	data->args.fh     = NFS_FH(data->inode);
 	/* Note: we always request a commit of the entire inode */