diff --git a/fs/sdcardfs/dentry.c b/fs/sdcardfs/dentry.c
index e6f8e9edf8a9..64494a50e250 100644
--- a/fs/sdcardfs/dentry.c
+++ b/fs/sdcardfs/dentry.c
@@ -82,11 +82,7 @@ static int sdcardfs_d_revalidate(struct dentry *dentry, unsigned int flags)
 		spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
 	}
 
-	if (dentry->d_name.len != lower_dentry->d_name.len) {
-		__d_drop(dentry);
-		err = 0;
-	} else if (strncasecmp(dentry->d_name.name, lower_dentry->d_name.name,
-				dentry->d_name.len) != 0) {
+	if (!qstr_case_eq(&dentry->d_name, &lower_dentry->d_name)) {
 		__d_drop(dentry);
 		err = 0;
 	}
@@ -166,7 +162,7 @@ static int sdcardfs_cmp_ci(const struct dentry *parent,
 	}
 	*/
 	if (name->len == len) {
-		if (strncasecmp(name->name, str, len) == 0)
+		if (str_n_case_eq(name->name, str, len))
 			return 0;
 	}
 	return 1;
diff --git a/fs/sdcardfs/derived_perm.c b/fs/sdcardfs/derived_perm.c
index c0d5a9d72bde..925692f0d20c 100644
--- a/fs/sdcardfs/derived_perm.c
+++ b/fs/sdcardfs/derived_perm.c
@@ -282,7 +282,7 @@ static void __fixup_perms_recursive(struct dentry *dentry, struct limit_search *
 	if (needs_fixup(info->perm)) {
 		list_for_each_entry(child, &dentry->d_subdirs, d_child) {
 			spin_lock_nested(&child->d_lock, depth + 1);
-			if (!(limit->flags & BY_NAME) || !strncasecmp(child->d_name.name, limit->name, limit->length)) {
+			if (!(limit->flags & BY_NAME) || qstr_case_eq(&child->d_name, &limit->name)) {
 				if (d_inode(child)) {
 					get_derived_permission(dentry, child);
 					fixup_tmp_permissions(d_inode(child));
diff --git a/fs/sdcardfs/packagelist.c b/fs/sdcardfs/packagelist.c
index 56d643f4a9ee..68f8f4571615 100644
--- a/fs/sdcardfs/packagelist.c
+++ b/fs/sdcardfs/packagelist.c
@@ -251,8 +251,7 @@ static void fixup_all_perms_name(const struct qstr *key)
 	struct sdcardfs_sb_info *sbinfo;
 	struct limit_search limit = {
 		.flags = BY_NAME,
-		.name = key->name,
-		.length = key->len,
+		.name = QSTR_INIT(key->name, key->len),
 	};
 	list_for_each_entry(sbinfo, &sdcardfs_super_list, list) {
 		if (sbinfo_has_sdcard_magic(sbinfo))
@@ -265,8 +264,7 @@ static void fixup_all_perms_name_userid(const struct qstr *key, userid_t userid)
 	struct sdcardfs_sb_info *sbinfo;
 	struct limit_search limit = {
 		.flags = BY_NAME | BY_USERID,
-		.name = key->name,
-		.length = key->len,
+		.name = QSTR_INIT(key->name, key->len),
 		.userid = userid,
 	};
 	list_for_each_entry(sbinfo, &sdcardfs_super_list, list) {
diff --git a/fs/sdcardfs/sdcardfs.h b/fs/sdcardfs/sdcardfs.h
index 042f989f0bea..0778eb063b63 100644
--- a/fs/sdcardfs/sdcardfs.h
+++ b/fs/sdcardfs/sdcardfs.h
@@ -470,8 +470,7 @@ extern void packagelist_exit(void);
 #define BY_USERID	(1 << 1)
 struct limit_search {
 	unsigned int flags;
-	const char *name;
-	size_t length;
+	struct qstr name;
 	userid_t userid;
 };
 
@@ -612,6 +611,11 @@ static inline bool str_case_eq(const char *s1, const char *s2)
 	return !strcasecmp(s1, s2);
 }
 
+static inline bool str_n_case_eq(const char *s1, const char *s2, size_t len)
+{
+	return !strncasecmp(s1, s2, len);
+}
+
 static inline bool qstr_case_eq(const struct qstr *q1, const struct qstr *q2)
 {
 	return q1->len == q2->len && str_case_eq(q1->name, q2->name);