[2.6.20 patch] v9fs_vfs_mkdir(): fix a double free

[Adrian Bunk <bunk@stusta.de>]

This patch fixes a double free of "dfid" introduced by
commit da977b2c7eb4d6312f063a7b486f2aad99809710 and spotted by the 
Coverity checker.

Signed-off-by: Adrian Bunk <bunk@stusta.de>

--- linux-2.6.20-rc6-mm3/fs/9p/vfs_inode.c.old	2007-02-02 17:11:10.000000000 +0100
+++ linux-2.6.20-rc6-mm3/fs/9p/vfs_inode.c	2007-02-02 17:39:12.000000000 +0100
@@ -583,21 +583,18 @@ static int v9fs_vfs_mkdir(struct inode *
 	v9fs_fid_clunk(v9ses, dfid);
 	inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb);
 	if (IS_ERR(inode)) {
 		err = PTR_ERR(inode);
 		inode = NULL;
-		goto clean_up_fids;
+		v9fs_fid_destroy(vfid);
+		goto error;
 	}
 
 	dentry->d_op = &v9fs_dentry_operations;
 	d_instantiate(dentry, inode);
 	return 0;
 
-clean_up_fids:
-	if (vfid)
-		v9fs_fid_destroy(vfid);
-
 clean_up_dfid:
 	v9fs_fid_clunk(v9ses, dfid);
 
 error:
 	return err;
-
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