NFS: Deletion of unnecessary checks before the function call "nfs_put_client"

The nfs_put_client() function tests whether its argument is NULL and then
returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

fs/nfs/filelayout/filelayoutdev.c

@@ -204,7 +204,6 @@ destroy_ds(struct nfs4_pnfs_ds *ds)
 	ifdebug(FACILITY)
 		print_ds(ds);
 
-	if (ds->ds_clp)
 	nfs_put_client(ds->ds_clp);
 
 	while (!list_empty(&ds->ds_addrs)) {

fs/nfs/nfs4client.c

@@ -498,7 +498,6 @@ int nfs40_walk_client_list(struct nfs_client *new,
 			atomic_inc(&pos->cl_count);
 			spin_unlock(&nn->nfs_client_lock);
 
-			if (prev)
 			nfs_put_client(prev);
 			prev = pos;
 
@@ -517,7 +516,6 @@ int nfs40_walk_client_list(struct nfs_client *new,
 		atomic_inc(&pos->cl_count);
 		spin_unlock(&nn->nfs_client_lock);
 
-		if (prev)
 		nfs_put_client(prev);
 		prev = pos;
 
@@ -549,7 +547,6 @@ int nfs40_walk_client_list(struct nfs_client *new,
 
 	/* No match found. The server lost our clientid */
 out:
-	if (prev)
 	nfs_put_client(prev);
 	dprintk("NFS: <-- %s status = %d\n", __func__, status);
 	return status;
@@ -641,7 +638,6 @@ int nfs41_walk_client_list(struct nfs_client *new,
 			atomic_inc(&pos->cl_count);
 			spin_unlock(&nn->nfs_client_lock);
 
-			if (prev)
 			nfs_put_client(prev);
 			prev = pos;
 
@@ -675,7 +671,6 @@ int nfs41_walk_client_list(struct nfs_client *new,
 	/* No matching nfs_client found. */
 	spin_unlock(&nn->nfs_client_lock);
 	dprintk("NFS: <-- %s status = %d\n", __func__, status);
-	if (prev)
 	nfs_put_client(prev);
 	return status;
 }