[PATCH] fat: don't use custom hex_to_bin()

[Andy Shevchenko <andriy.shevchenko@linux.intel.com>]

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
---
 fs/fat/namei_vfat.c |   22 ++++++----------------
 1 files changed, 6 insertions(+), 16 deletions(-)

diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index bb3f29c..09cec4c 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -21,6 +21,8 @@
 #include <linux/slab.h>
 #include <linux/buffer_head.h>
 #include <linux/namei.h>
+#include <linux/kernel.h>
+
 #include "fat.h"
 
 /*
@@ -505,7 +507,6 @@ xlate_to_uni(const unsigned char *name, int len, unsigned char *outname,
 	     struct nls_table *nls)
 {
 	const unsigned char *ip;
-	unsigned char nc;
 	unsigned char *op;
 	unsigned int ec;
 	int i, k, fill;
@@ -530,21 +531,10 @@ xlate_to_uni(const unsigned char *name, int len, unsigned char *outname,
 						return -EINVAL;
 					ec = 0;
 					for (k = 1; k < 5; k++) {
-						nc = ip[k];
-						ec <<= 4;
-						if (nc >= '0' && nc <= '9') {
-							ec |= nc - '0';
-							continue;
-						}
-						if (nc >= 'a' && nc <= 'f') {
-							ec |= nc - ('a' - 10);
-							continue;
-						}
-						if (nc >= 'A' && nc <= 'F') {
-							ec |= nc - ('A' - 10);
-							continue;
-						}
-						return -EINVAL;
+						int val = hex_to_bin(ip[k]);
+						if (val < 0)
+							return -EINVAL;
+						ec = (ec << 4) | val;
 					}
 					*op++ = ec & 0xFF;
 					*op++ = ec >> 8;
-- 
1.7.6.3