From: Daniel Rosenberg <drosen@google.com>
Date: Wed, 15 Feb 2017 04:47:17 +0000 (-0800)
Subject: ANDROID: sdcardfs: Fix incorrect hash
X-Git-Tag: release-20171130_firefly~4^2~100^2~232
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=9068b415feec9fb4c04ee586d3d047dcfc0dc8a9;p=firefly-linux-kernel-4.4.55.git

ANDROID: sdcardfs: Fix incorrect hash

This adds back the hash calculation removed as part of
the previous patch, as it is in fact necessary.

Signed-off-by: Daniel Rosenberg <drosen@google.com>
Bug: 35307857
Change-Id: Ie607332bcf2c5d2efdf924e4060ef3f576bf25dc
---

diff --git a/fs/sdcardfs/lookup.c b/fs/sdcardfs/lookup.c
index 9135866b7766..6b595e892316 100644
--- a/fs/sdcardfs/lookup.c
+++ b/fs/sdcardfs/lookup.c
@@ -221,6 +221,7 @@ static struct dentry *__sdcardfs_lookup(struct dentry *dentry,
 	struct dentry *lower_dentry;
 	const struct qstr *name;
 	struct path lower_path;
+	struct qstr dname;
 	struct sdcardfs_sb_info *sbi;
 
 	sbi = SDCARDFS_SB(dentry->d_sb);
@@ -306,11 +307,14 @@ static struct dentry *__sdcardfs_lookup(struct dentry *dentry,
 		goto out;
 
 	/* instatiate a new negative dentry */
-	lower_dentry = d_lookup(lower_dir_dentry, name);
+	dname.name = name->name;
+	dname.len = name->len;
+	dname.hash = full_name_hash(dname.name, dname.len);
+	lower_dentry = d_lookup(lower_dir_dentry, &dname);
 	if (lower_dentry)
 		goto setup_lower;
 
-	lower_dentry = d_alloc(lower_dir_dentry, name);
+	lower_dentry = d_alloc(lower_dir_dentry, &dname);
 	if (!lower_dentry) {
 		err = -ENOMEM;
 		goto out;