wireless: at76c50x: use native hex_pack_byte() method

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: "John W. Linville" <linville@tuxdriver.com>
Tested-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 8 insertions, 10 deletions

diff --git a/drivers/net/wireless/at76c50x-usb.c b/drivers/net/wireless/at76c50x-usb.c
index 298601436ee2..39322d4121b7 100644
--- a/drivers/net/wireless/at76c50x-usb.c
+++ b/drivers/net/wireless/at76c50x-usb.c
@@ -500,10 +500,9 @@ exit:
 
 #define HEX2STR_BUFFERS 4
 #define HEX2STR_MAX_LEN 64
-#define BIN2HEX(x) ((x) < 10 ? '0' + (x) : (x) + 'A' - 10)
 
 /* Convert binary data into hex string */
-static char *hex2str(void *buf, int len)
+static char *hex2str(void *buf, size_t len)
 {
         static atomic_t a = ATOMIC_INIT(0);
         static char bufs[HEX2STR_BUFFERS][3 * HEX2STR_MAX_LEN + 1];
@@ -514,18 +513,17 @@ static char *hex2str(void *buf, int len)
         if (len > HEX2STR_MAX_LEN)
                 len = HEX2STR_MAX_LEN;
 
-        if (len <= 0) {
-                ret[0] = '\0';
-                return ret;
-        }
+        if (len == 0)
+                goto exit;
 
         while (len--) {
-                *obuf++ = BIN2HEX(*ibuf >> 4);
-                *obuf++ = BIN2HEX(*ibuf & 0xf);
+                obuf = pack_hex_byte(obuf, *ibuf++);
                 *obuf++ = '-';
-                ibuf++;
         }
-        *(--obuf) = '\0';
+        obuf--;
+
+exit:
+        *obuf = '\0';
 
         return ret;
 }