From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 5 Jun 2012 13:10:31 +0000 (+0200)
Subject: vfs: do_last(): clean up retry
X-Git-Tag: upstream/snapshot3+hdmi~6890^2~140
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f60dc3db6e24b7c36445cf1feb56b34c799074b3;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

vfs: do_last(): clean up retry

Move the lookup retry logic to the bottom of the function to make the normal
case simpler to read.

Reported-by: David Howells <dhowells@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/namei.c b/fs/namei.c
index 6bdb8d7..183a769 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2614,22 +2614,11 @@ finish_open_created:
 		goto exit;
 	od->mnt = nd->path.mnt;
 	filp = finish_open(od, nd->path.dentry, NULL);
-	if (filp == ERR_PTR(-EOPENSTALE) && save_parent.dentry && !retried) {
-		BUG_ON(save_parent.dentry != dir);
-		path_put(&nd->path);
-		nd->path = save_parent;
-		nd->inode = dir->d_inode;
-		save_parent.mnt = NULL;
-		save_parent.dentry = NULL;
-		if (want_write) {
-			mnt_drop_write(nd->path.mnt);
-			want_write = false;
-		}
-		retried = true;
-		goto retry_lookup;
-	}
-	if (IS_ERR(filp))
+	if (IS_ERR(filp)) {
+		if (filp == ERR_PTR(-EOPENSTALE))
+			goto stale_open;
 		goto out;
+	}
 	error = open_check_o_direct(filp);
 	if (error)
 		goto exit_fput;
@@ -2659,6 +2648,23 @@ exit_fput:
 	fput(filp);
 	goto exit;
 
+stale_open:
+	/* If no saved parent or already retried then can't retry */
+	if (!save_parent.dentry || retried)
+		goto out;
+
+	BUG_ON(save_parent.dentry != dir);
+	path_put(&nd->path);
+	nd->path = save_parent;
+	nd->inode = dir->d_inode;
+	save_parent.mnt = NULL;
+	save_parent.dentry = NULL;
+	if (want_write) {
+		mnt_drop_write(nd->path.mnt);
+		want_write = false;
+	}
+	retried = true;
+	goto retry_lookup;
 }
 
 static struct file *path_openat(int dfd, const char *pathname,