gfs2: Partially revert gfs2_inode_lookup change

Commit c412a97c changed delete_work_func() to always perform an
inode lookup when gfs2_try_evict() fails.  This doesn't make sense as a
gfs2_try_evict() failure indicates that the inode is likely still in
use.  Revert that change.

Fixes: c412a97c ("gfs2: Use TRY lock in gfs2_inode_lookup for UNLINKED inodes")
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

fs/gfs2/glock.c

@@ -1082,6 +1082,7 @@ static void delete_work_func(struct work_struct *work)
 			if (gfs2_queue_delete_work(gl, 5 * HZ))
 				return;
 		}
+		goto out;
 	}
 
 	inode = gfs2_lookup_by_inum(sdp, no_addr, gl->gl_no_formal_ino,
@@ -1094,6 +1095,7 @@ static void delete_work_func(struct work_struct *work)
 		d_prune_aliases(inode);
 		iput(inode);
 	}
+out:
 	gfs2_glock_put(gl);
 }